Hybrid Tool + ReportStage1c review self-heal: 2026-06-04
12mm Gear Motor Sizing Tool and Decision Report (includes 12mm n20 gear motor + 12mm dc gear motor factories + 12mm 6v n20 150 rpm micro torque gear box motor aliases)
Use one canonical URL to finish two tasks in sequence: get an immediate motor-fit estimate, then verify decision quality with evidence, boundaries, alternatives, and risk controls for both sourcing-intent and engineering-intent aliases.
Published: 2026-05-09 | Last updated: 2026-06-04 | Review cadence: quarterly
Tool layer: quick sizing input
Enter boundary-safe values first. Invalid input is blocked and recoverable. Default preset mirrors a 6V / 150 rpm alias-screening case.
Result layer: interpreted outputNo result yet
Result includes interpretation, uncertainty, and the next executable action.
Empty state
No calculation yet. Enter inputs and run the estimator to generate a fit decision.
Stage1b gap audit and closure status
Audit-first enhancement: each high-impact content gap is tracked with explicit remediation status.
Gap closure ledger
Blocker/high gaps are closed in-page; unresolved items remain explicitly marked for follow-up.
| Gap found | Decision impact | Stage1b action | Status |
|---|---|---|---|
| Short alias `12mm n20 gear motor` was covered only indirectly through longer N20 wording. | High risk of under-answering the exact change keyword while still avoiding a duplicate route. | Added `12mm n20 gear motor` across hero copy, metadata, evidence ledger, FAQ, and alias anchor blocks while preserving canonical /learn/12mm-gear-motor. | Closed in stage1c (2026-06-04) |
| Factory-intent alias `12mm dc gear motor factories` was not explicitly covered in top-level intro, FAQ, and anchor blocks. | High risk of under-serving supplier-discovery intent on the canonical route despite one-URL strategy. | Added `12mm dc gear motor factories` across intro, FAQ, internal anchors, and route-level metadata while preserving the same hybrid tool/report URL. | Closed in stage1c (2026-05-25) |
| Alias coverage was still centered on `12mm 3v dc gear motor` and did not explicitly answer this change keyword. | High risk of mismatch between route intent and on-page decision guidance for `12mm 6v n20 150 rpm micro torque gear box motor` traffic. | Replaced alias intent layer (hero, anchors, FAQ, evidence rows) with `12mm 6v n20 150 rpm micro torque gear box motor` and kept one canonical route. | Closed in stage1b |
| The page did not quantify what “6V N20 150rpm” means at spec level (ratio semantics + motor variant spread). | High risk of treating alias wording as a single fixed SKU/performance point. | Added Pololu 150.58:1 exact-ratio fact and LP/MP/HP 6V no-load speed spread (90/150/210 rpm). | Closed in stage1b |
| Driver sizing risk around 150:1 variants was under-specified. | High risk of applying one current budget to LP/MP/HP variants despite large stall-current spread. | Added LP/MP/HP stall-current spread (0.36A/0.67A/1.6A) and tied it to RMS/peak driver checks. | Closed in stage1b |
| `150 rpm` label could be misread as loaded guaranteed speed. | High risk of quoting unloaded speed as contractual output-speed guarantee. | Added no-load boundary (+/-20% tolerance) and MP 6V max-efficiency point (110 rpm at 0.26 kg.cm) for loaded-speed interpretation. | Closed in stage1b |
| Encoder scaling impact at 150:1 was not surfaced in decision layer. | Medium-to-high risk of under-scoping MCU counter rate and closed-loop firmware budget. | Added encoder-resolution boundary: 12 CPR at motor shaft becomes ~1807 CPR after 150.58:1 reduction. | Closed in stage1b |
| Continuous-load risk near stall region was not anchored to explicit vendor guidance in this page. | High risk of overheating gears/driver by using peak or stall numbers as steady-state targets. | Added Pololu FAQ boundary (continuous operation should stay around or below ~25% of stall-current/torque region) and linked to release-gate checks. | Closed in stage1b |
| Cross-vendor normalized standard for alias wording to guaranteed electrical/thermal behavior is still unavailable. | Medium risk of treating vendor alias phrase as an engineering standard. | Kept this item explicitly open and marked as “pending confirmation / no reliable public dataset.” | Open (evidence pending) |
| The exact alias `12mm n20 gear motor` still lacked a mechanical package boundary. | High risk of buyers assuming “12mm” means a round cylindrical body instead of a 10x12mm gearbox-class N20 form factor. | Added Pololu package facts (10x12mm gearbox, 9mm x 3mm D shaft, +3.5mm on 1000:1 variants) and linked them to RFQ/mechanical release gates. | Closed in stage1b (2026-06-04) |
| The report did not show how to convert a short N20 marketplace phrase into comparable RFQ fields. | High risk of comparing supplier offers by headline rpm/voltage only while missing shaft geometry, exact ratio, winding class, and stall/duty boundaries. | Added alias-to-RFQ translation guidance across research delta, release gates, scenarios, and FAQ. | Closed in stage1b (2026-06-04) |
| One MP 6V 150:1 source link pointed to a non-matching Pololu product page. | High risk of making the 150rpm / 0.67A core data point difficult to reproduce. | Corrected the source ledger and factory benchmark link to the Pololu 150:1 Micro Metal Gearmotor MP 6V page. | Closed in stage1b (2026-06-04) |
| LP/MP/HP comparison lacked no-load current, stall torque, and max-output-power spread at the same 6V/150:1 class point. | High risk of selecting driver current, thermal budget, or expected output power from a single headline row. | Added variant envelope table with no-load current (40/70/100mA), stall torque (1.1/1.3/2.4kg.cm), and max output power (0.25/0.48/1.2W). | Closed in stage1b (2026-05-18) |
| Low-voltage driver discussion did not include encoder electrical limits. | High risk of approving 1.65V-2.6V control rails without validating encoder supply and logic-level compatibility. | Added encoder rail boundary (2.7V-18V Vcc, 10,000Ω pull-up) into summary, release gates, risks, scenarios, and tool boundary notes. | Closed in stage1b (2026-05-18) |
| On-page model heuristics (startup-current multiplier and ESR window) were not explicitly separated from public standards. | Medium-to-high risk of readers treating tool assumptions as universally validated constants. | Added model-assumption register with explicit certainty labels and “pending confirmation / no reliable public dataset” boundaries. | Closed in stage1b (2026-05-18) |
| Factory-selection guidance lacked a cross-factory evidence table with dated, vendor-published limits. | High risk of comparing `12mm dc gear motor factories` offers using non-comparable marketing labels only. | Added factory evidence snapshot (TT Motor + Pololu + FAULHABER) with explicit voltage/power/ratio windows and source dates, plus decision notes for apples-to-apples RFQ checks. | Closed in stage1b (2026-05-25) |
| The page did not define when IE-class references are in-scope vs out-of-scope for 12mm micro DC motors. | High risk of treating informal `IE2` wording as direct compliance proof for micromotor factory listings. | Added IEC 60034-30-1 scope boundary (0.12-1000kW, 50-1000V AC, DC commutator motors excluded) and paired it with EU 2019/1781 scope notes. | Closed in stage1b (2026-05-25) |
| Factory due-diligence workflow did not include certificate-verification and market-access timeline gates. | High risk of selecting suppliers with unverified certificates or missing market-entry compliance path. | Added IAF/ISO CertSearch evidence and EU/US market-access timeline gates (EU forced-labour application date + UFLPA enforcement baseline) with explicit RFQ actions. | Closed in stage1b (2026-05-25) |
Report summary: conclusions and key numbers
Core conclusions are paired with quantifiable context before deep-dive sections.
Canonical query volume
10 / month
`12mm gear motor` (US keyword snapshot in canonical change proposal, 2026-04-06).
Alias query volume snapshot
0 / month
`12mm n20 gear motor`, `12mm dc gear motor factories`, and `12mm 6v n20 150 rpm micro torque gear box motor` are merged into this canonical URL (alias-merge proposals).
N20 naming boundary
10 x 12 mm gearbox class
Pololu uses 10x12mm gearbox cross-section / N20-family wording; `12mm n20 gear motor` still needs PN-level voltage, ratio, and motor variant before RFQ.
N20 package drawing boundary
10 x 12 mm + 3mm D shaft
Pololu category/drawing pages list a 9mm output shaft and +3.5mm length for 1000:1 variants; do not assume a round 12mm cylindrical envelope.
N20 1000:1 length exception
25.6mm vs 29.1mm OL max
Pololu 2024 dimension drawing separates all non-1000:1 versions from 1000:1 overall-length limits.
N20 150:1 exact ratio boundary
150.58:1
Pololu Micro Metal Gearmotors datasheet Rev 6.2 (published 2026-02).
6V 150:1 no-load speed spread
90/150/210 rpm
Same ratio but LP/MP/HP variants differ materially (Pololu specs, accessed 2026-05-14).
6V 150:1 stall-current spread
0.36A/0.67A/1.6A
LP/MP/HP electrical load window is not interchangeable for driver sizing.
6V 150:1 no-load current spread
40/70/100 mA
At the same ratio and voltage, no-load current still spans about 2.5x from LP to HP (Pololu specs, accessed 2026-05-18).
6V 150:1 max output power spread
0.25/0.48/1.2 W
LP-to-HP output power window is about 4.8x at the same nominal ratio (Pololu specs, accessed 2026-05-18).
150rpm interpretation boundary
Typical no-load target only
Pololu uses typical no-load speed with ±20% tolerance; loaded speed requires torque-line interpolation.
Encoder output resolution cue
~1807 CPR
A 12 CPR motor-shaft encoder becomes ~1807 CPR after 150.58:1 gearbox reduction.
Encoder rail boundary
2.7V-18V Vcc
Pololu encoder outputs are pulled up to Vcc through 10,000Ω; low-voltage control rails below 2.7V need interface planning.
Gear ratio envelope
4:1 to 1024:1
maxon GPX10 catalog page (EN-373, accessed 2026-04-26).
GPX10 stage efficiency window
90% to 59%
1 to 5 stages on maxon EN-373; higher stage counts trade efficiency for ratio.
RE10 boundary reference (PN256105)
12V, 12,500 rpm, 1.55 mNm
maxon product page (accessed 2026-04-26), with NRND lifecycle flag.
Driver floor split
2.7V vs 1.65V
TI DRV8833 (2.7V min) and DRV8212 (1.65V min) product pages (accessed 2026-04-26).
Driver current boundary
1.5A RMS / 2A peak
TI DRV8833 product page (accessed 2026-04-26).
DRV8833 UVLO boundary
2.6V fall / ~2.69V recover
DRV8833 datasheet Rev.E with 90mV UVLO hysteresis (accessed 2026-04-26).
DRV8212 thermal derate cue
RDS(on) ~1.5x at 85C
DRV8212 datasheet thermal example; keep VM ripple planning target near 10% before bench validation.
Brushed speed-life planning
4k-9k rpm preferred zone
maxon DC motor selection guide (2019) links this zone to better efficiency and life tradeoff.
REACH Candidate List
253 entries
ECHA Candidate List table shows 253 results (accessed 2026-05-09); legal obligations remain tied to Candidate List entries.
SVHC intentions registry boundary
273 unique entries
ECHA registry page (last updated 2026-02-04; accessed 2026-05-09) tracks intentions-until-outcome and is not the same dataset as Candidate List obligations.
ECHA source-transition boundary
Legacy list retained until 2026-07
Candidate List/registry pages signal transition to ECHA CHEM; evidence records must preserve source system and retrieval date.
SCIP market-duty trigger
Since 2021-01-05
ECHA SCIP + Directive (EU) 2018/851 for EU-supplied articles with Candidate List SVHC above 0.1% w/w.
Factory data comparability boundary
2.4-12V / 0.5W vs IE scope 0.12-1000kW
Vendor micro-motor pages and IEC IE-class scope use different envelopes; do not infer regulatory IE class equivalence from search labels.
Accredited cert verification capacity
3/day search + 30/day verify
IAF CertSearch public limits are finite; plan supplier-certificate screening workflow upfront for multi-factory RFQs.
Reference lifecycle caveat
RE10 PN256105: NRND
Treat as class-level boundary data, not default production continuity.
Who this is suitable for
- Need a fast pre-RFQ shortlist for 12mm direct-drive vs geared options.
- Need to interpret `12mm n20 gear motor` without assuming one universal voltage, ratio, or current class.
- Need to compare 12mm dc gear motor factories options without splitting into multiple keyword pages.
- Need to verify whether a 12mm 6v n20 150 rpm micro torque gear box motor should stay direct-drive or move to a gearhead.
- Need output-speed/torque feasibility check before choosing ratio and driver class.
- Need one decision memo with alias intent, evidence boundaries, and sourcing actions.
Who this is not suitable for
- Safety-critical products needing certified thermal/lifetime tests.
- Projects requiring guaranteed output-speed tolerance without supplier test data.
- Applications with explosive atmosphere compliance or IP67 guarantee.
- Mass production release without bench validation and sample approval.
Methods and evidence
Transparent formulas, dated sources, and explicit known/unknown boundaries.
Method flow
Input to estimate to boundary check to action path.
| Method block | Formula / rule | Decision value |
|---|---|---|
| Mechanical power estimate | P = 2 * pi * n / 60 * T | Converts speed and torque into shaft mechanical load. |
| Rated current estimate | I = P / (V * eta) + I_idle | Adds efficiency + idle current to avoid optimistic sizing. |
| Geared output speed estimate | n_out ~= n_motor / i | Provides first-pass speed estimate before tolerance and load corrections. |
| Startup surge estimate | I_start ~= 2.4 * I_rated | Used for driver and power rail margin planning. |
| Startup droop guardrail | V_min ~= V_nom - I_start * ESR | Checks whether rail sag can cross UVLO boundaries during startup transients. |
| Bulk-capacitance first pass | C_bulk >= I_step * dt / dV | Use datasheet-level ripple targets as initial sizing, then validate with oscilloscope waveforms. |
| Driver thermal check | P_driver ~= I_rms^2 * RDS(on) | RMS current governs thermal stress; peak-current labels are not continuous-use guarantees. |
| Direct-drive speed margin | speed_margin = n_ref_max - n_target | Flags when target speed exceeds RE10-class 14k rpm reference envelope. |
| Brushed speed-life window | Prefer ~4,000-9,000 rpm for life/efficiency tradeoff | At low-speed targets, a gearhead path is often more practical than forcing direct-drive operation. |
| Nominal-to-exact ratio guardrail | n_out exact ~= n_motor / i_exact | For high-ratio gearheads, use exact ratio and tolerance instead of nominal shorthand. |
| Alias-to-RFQ conversion | Search phrase -> voltage + exact ratio + winding class + shaft + load profile + duty | Converts `12mm n20 gear motor` from marketplace wording into comparable supplier fields. |
| N20 package-release check | Envelope = 10x12mm gearbox + 9mm x 3mm D shaft; 1000:1 adds length | Prevents mechanical release based on the word `12mm` alone. |
| GPX10 stage-penalty check | eta_max(1..5) = 90%, 81%, 73%, 65%, 59% | Stage count increases ratio but typically lowers efficiency and increases backlash. |
| REACH article communication gate | SVHC > 0.1% (w/w) => Art.33 info flow; Art.7(2) notification when applicable | RoHS-only declarations are not sufficient for EU article-level chemical communication workflows. |
| SVHC dataset boundary check | Candidate List entries != Registry intentions entries | Use Candidate List for legal obligations and use Registry of intentions for forward-looking watchlists only. |
| Confidence score | Base 91 - condition penalties | Reduces confidence in high duty, high heat, low voltage cases. |
Source ledger
Time markers and certainty labels are mandatory for trust. Last refreshed: 2026-05-25.
| Source | Date | Coverage | Known / Unknown |
|---|---|---|---|
| openspec/changes/add-kw-12mm-gear-motor-page/proposal.md | 2026-04-06 | Canonical route and keyword snapshot context (`12mm gear motor`, volume 10/month in proposal). | Known |
| openspec/changes/archive/2026-06-04-add-kw-12mm-n20-gear-motor-page/specs/rwa-pages/spec.md | 2026-06-04 | Alias `12mm n20 gear motor` -> `/learn/12mm-gear-motor`; no dedicated route. | Known |
| openspec/changes/add-kw-12mm-6v-n20-150-rpm-micro-torque-gear-box-motor-page/specs/rwa-pages/spec.md | 2026-04-06 | Alias `12mm 6v n20 150 rpm micro torque gear box motor` -> `/learn/12mm-gear-motor`. | Known |
| openspec/changes/archive/2026-05-25-add-kw-12mm-dc-gear-motor-factories-page/specs/rwa-pages/spec.md | 2026-05-25 | Alias `12mm dc gear motor factories` -> `/learn/12mm-gear-motor`. | Known |
| OpenSpec change: add-kw-12mm-n20-gear-motor-page | 2026-06-04 | Short N20 alias remains on the same canonical route with tool-first and report-layer continuity. | Known |
| OpenSpec change: add-kw-12mm-6v-n20-150-rpm-micro-torque-gear-box-motor-page | 2026-05-14 | No standalone alias route; canonical-only decision. | Known |
| OpenSpec change: add-kw-12mm-dc-gear-motor-factories-page | 2026-05-25 | Factory-intent alias remains on the same canonical route with tool-first and report-layer continuity. | Known |
| ISO Survey | Published 2025-09-23 (accessed 2026-05-25) | ISO confirms the survey has been running since 1993 and now counts certificates uploaded to IAF CertSearch. | Known |
| IAF CertSearch transitioning-period FAQ | Accessed 2026-05-25 | States at least monthly upload expectation for ISO/IEC 17021-1 accredited certificates and public-user limits (3/day search, 30/day verification). | Known with platform scope |
| IEC 60034-30-1:2025 scope page | Published 2025-12-01 (accessed 2026-05-25) | IE-class standard scope is line-operated AC motors (0.12-1000kW, 50-1000V) and excludes mechanical-commutator DC motors. | Known |
| EUR-Lex Regulation (EU) 2019/1781 (motor ecodesign) | Accessed 2026-05-25 | Scope language targets induction electric motors without brushes, with rated voltage above 50V and rated output between 0.12kW and 1000kW. | Known |
| TT Motor GM12-N20VA product page | Accessed 2026-05-25 | Factory page lists 2.4-12V input, 1-1200 rpm output-speed window, max power 0.5W, and continuous current 30-60mA. | Known with vendor scope |
| TT Motor GM12-N30VA product page | Accessed 2026-05-25 | Factory page lists ratio options from 3 to 1000 and torque claim up to 0.1Nm. | Known with vendor scope |
| FAULHABER 12/5 gearhead product page | Accessed 2026-05-25 | Lists torque up to 30mNm, intermittent torque up to 100mNm, continuous input speed up to 5,000rpm, and max exact ratio 161.384. | Known with vendor scope |
| EUR-Lex Regulation (EU) 2024/3015 (forced labour) | Published 2024-12-12 (accessed 2026-05-25) | Regulation enters into force on 2024-12-13 and generally applies from 2027-12-14, creating lead-time pressure for importer due-diligence workflows. | Known |
| U.S. CBP / DHS UFLPA baseline | Effective 2022-06-21 (accessed 2026-05-25) | UFLPA enforcement presumption is active for U.S. imports; factory screening for regional supply-chain exposure is required for U.S.-bound programs. | Known with jurisdiction scope |
| Pololu Micro Metal Gearmotors datasheet (Rev 6.2) | Published 2026-02 (accessed 2026-05-14) | 10x12mm form factor family; exact ratios for each nominal ratio (150:1 maps to 150.58:1), and no-load speed/current tolerance notes (about +/-20% speed, +/-50% current). | Known with vendor scope |
| Pololu Micro Metal Gearmotors category page | Accessed 2026-06-04 | States the family has 10x12mm gearboxes, 9mm-long 3mm D-shaped output shaft, 3.5mm extra gearbox length on 1000:1 versions, and that this form factor is sometimes referred to as N20 motors. | Known with vendor scope |
| Pololu Micro Metal Gearmotor dimension drawing | Drawing date 2024-04-03 (accessed 2026-06-04) | No-encoder precious-metal-brush drawing lists overall length max 25.6mm for non-1000:1 variants and 29.1mm for 1000:1 variants. | Known with drawing scope |
| Pololu 150:1 Micro Metal Gearmotor LP 6V specs | Accessed 2026-05-14 | Typical no-load speed 90 rpm and stall current 0.36A for LP 6V variant at 150:1 nominal ratio. | Known with vendor scope |
| Pololu 150:1 Micro Metal Gearmotor MP 6V specs | Accessed 2026-06-04 | Typical no-load speed 150 rpm, stall current 0.67A, and max-efficiency point near 110 rpm / 0.26 kg.cm for MP 6V 150:1 variant. | Known with vendor scope |
| Pololu 150:1 Micro Metal Gearmotor HP 6V specs | Accessed 2026-05-14 | Typical no-load speed 210 rpm and stall current 1.6A for HP 6V 150:1 variant, showing non-interchangeable electrical envelope versus LP/MP. | Known with vendor scope |
| Pololu 150:1 HP 6V FAQ | Accessed 2026-05-14 | Pololu advises continuous operation around/below about 25% of stall current or torque and warns high-ratio gears can be damaged if stalled. | Known with boundary |
| maxon RE10 product page (Part No. 256105) | Accessed 2026-04-26 | 12V reference with 12,500 rpm no-load speed, 14,000 rpm max speed, 1.55 mNm nominal torque, 0.36A stall current, and NRND lifecycle flag. | Known |
| maxon GPX10 catalog page (EN-373) | Accessed 2026-04-26 | Reduction 4:1/16:1/64:1/256:1/1024:1 with 1-5 stages; max efficiency 90/81/73/65/59%; average backlash 1.5°-2.5°; continuous input speed 12,000 rpm; catalog page marks data as provisional. | Known with provisional boundary |
| FAULHABER Precision Gearheads Technical Information | Accessed 2026-04-26 | Intermittent torque should be limited to short intervals and <=5% duty cycle; exceeding continuous torque can reduce service life; recommended motor steady-state temperature 60-70C to protect lubricant. | Known with boundary |
| FAULHABER DC Motors Technical Information | Accessed 2026-04-26 | Brushed-motor operational lifetime about 1,000-5,000 h under typical load, from several hundred hours to >25,000 h depending on conditions; PWM recommendation at/above 20 kHz. | Known with scope |
| TI DRV8833 product page + datasheet | Accessed 2026-05-09 | VM range 2.7V-10.8V, full-scale output current 1.5A RMS, peak output current 2A, and 360mOhm HS+LS RDS(on) at 25C. | Known |
| TI DRV8833 datasheet (Rev.E) | Accessed 2026-05-09 | UVLO falling threshold around 2.6V with 90mV hysteresis and >=10uF VM bulk-capacitance recommendation for motor supply stability. | Known |
| TI DRV8212 product page | Accessed 2026-05-09 | VM range 1.65V-12V, peak output current 4A, and 280mOhm HS+LS RDS(on) typical on product page. | Known with boundary |
| TI DRV8212 datasheet (Rev.B) | Accessed 2026-05-09 | UVLO thresholds are 1.65V rising / 1.30V falling with 80mV hysteresis and about 3.8us UVLO deglitch; current capability depends on PCB/system thermal design and thermal examples derate RDS(on) by ~1.5x at 85C. | Known with boundary |
| TI Application Report SLVA505A | Published 2024-07 (accessed 2026-05-09) | Driver current limits are thermally constrained by RMS current and conduction losses scale with I^2 * RDS(on). | Known |
| EUR-Lex Directive 2011/65/EU (RoHS baseline) | Accessed 2026-04-26 | RoHS framework and Annex II concentration-limit structure for homogeneous materials. | Known |
| EUR-Lex Directive (EU) 2015/863 | Accessed 2026-04-26 | Annex II expanded to 10 substances including DEHP/BBP/DBP/DIBP at 0.1%; general applicability from 2019-07-22 and medical/monitoring categories from 2021-07-22. | Known |
| ECHA news: ECHA adds three hazardous chemicals to the Candidate List | Published 2025-06-25 (accessed 2026-05-09) | ECHA reiterates article obligations: suppliers communicate safe use above 0.1% w/w, and importers/producers notify ECHA within six months from inclusion date (example inclusion date: 2025-06-25). | Known |
| ECHA Candidate List table | Accessed 2026-05-09 | Candidate List table shows 253 results, states the website list is the authentic version for legal obligations, and notes legacy-page maintenance until July 2026 during ECHA CHEM transition. | Known |
| ECHA Registry of SVHC intentions until outcome | Accessed 2026-05-09 | Registry page states last updated 2026-02-04 and contains 273 unique substances/entries; it also notes transition to ECHA CHEM (available since 2025-09-16), and the registry tracks intentions-until-outcome rather than current Candidate List obligations. | Known |
| ECHA: Information on Candidate List substances in articles | Accessed 2026-05-09 | Legacy substances-in-articles dataset reports last update at 2019-12-18 and indicates no further updates, redirecting users to SCIP and ECHA CHEM-era data sources. | Known with limitation |
| ECHA SCIP database guidance | Accessed 2026-04-26 | SCIP submissions are required for EU-supplied articles containing Candidate List SVHC above 0.1% w/w; submission timing is tied to market placement duties. | Known with role boundary |
| EUR-Lex Directive (EU) 2018/851 (Waste Framework update) | Accessed 2026-04-26 | Article 9 provisions establish article-level information obligations that feed SCIP workflows for SVHC-containing products in EU supply chains. | Known |
| maxon: The selection of brushed DC motor (Technical article 130) | Published 2019-11 (accessed 2026-04-26) | Brushed operation often prefers ~4,000-9,000 rpm for efficiency/life tradeoff; cited life ranges vary from <100 h to >10,000 h depending on commutation system and load. | Known with scope |
| On-page sizing model (this tool) | 2026-05-14 | Pre-RFQ current/power/fit scoring; not a substitute for PN-level endurance validation. | Known |
| Cross-vendor standard mapping `12mm 6v n20 150 rpm micro torque gear box motor` query wording to electrical/thermal limits | Pending | No reliable public standard dataset found; vendor PNs remain authoritative. | Pending confirmation / no reliable public dataset |
Stage1b research delta
Only net-new, source-verifiable information is included here. Each row states scope and decision consequence.
New evidence-backed decision facts
Update date: 2026-05-25. Facts without stable public evidence stay in the pending block.
| Topic | New fact | Applicable condition | Decision effect | Certainty |
|---|---|---|---|---|
| Short N20 alias boundary | `12mm n20 gear motor` identifies the common 12mm/N20 gearmotor class, but it does not specify voltage, exact ratio, winding power class, encoder, or gearbox material. | Applies to search and sourcing triage before a supplier PN or datasheet is selected. | Keep the query merged to the canonical page and convert the search phrase into PN-level RFQ fields before comparing offers. | Known with alias-scope boundary |
| N20 package boundary | Pololu describes its Micro Metal Gearmotors as a 10x12mm gearbox family with a 9mm-long, 3mm-diameter D-shaped output shaft, and notes this form factor is sometimes referred to as N20 motors. | Applies to mechanical screening when a search result or RFQ uses `12mm n20 gear motor` without a drawing. | Treat the alias as a package-family clue; require drawing-controlled envelope, mounting screw depth, shaft flat orientation, and connector/encoder protrusion before mechanical release. | Known with vendor scope |
| 1000:1 package counterexample | Pololu dimension data separates all non-1000:1 versions (25.6mm overall length max without encoder) from 1000:1 versions (29.1mm), a 3.5mm length delta. | Applies when a high-ratio N20 quote is substituted into a housing designed around a lower-ratio sample. | Do not approve housing tooling from one ratio sample; re-check exact ratio, overall length, and encoder connector side for every candidate PN. | Known with drawing scope |
| N20 high-ratio torque-damage boundary | Pololu Rev 6.2 warns the highest ratios can damage themselves beyond rated loads and lists recommended instantaneous torque limits around 20kg.mm for most ratios and 25kg.mm for 380:1/1000:1 versions. | Applies to stalls, hard stops, wheel impacts, and actuator end-stop events in compact gearmotor applications. | Add mechanical stops/current limiting and avoid treating higher ratio as a free way to obtain more continuous torque. | Known with vendor scope |
| Alias semantics boundary (`6V N20 150rpm`) | Pololu Rev 6.2 maps nominal 150:1 to exact 150.58:1 and explicitly treats speed/current figures as typical no-load values. | Applies to Pololu micro metal gearmotor family and should be treated as vendor-scope evidence, not a global N20 standard. | Do not treat alias wording as a frozen production spec; convert to exact ratio + vendor PN before RFQ commitment. | Known with vendor scope |
| LP/MP/HP split at same ratio | At 6V and nominal 150:1, Pololu LP/MP/HP variants list about 90/150/210 rpm no-load speed and 0.36/0.67/1.6A stall current. | Same nominal ratio does not imply same electrical load, speed, or thermal behavior across motor variants. | Split RFQ branches by LP/MP/HP motor type and re-run driver/rail sizing per branch. | Known with vendor scope |
| 150rpm is not loaded-speed guarantee | For MP 6V 150:1, Pololu lists ~150 rpm no-load and max-efficiency near 110 rpm at 0.26 kg.cm. | Output-speed commitments must be derived from torque-speed interpolation under application load, not from catalog no-load headline. | Quote loaded-speed range (min/typ/max) in RFQ, not a single no-load rpm value. | Known with vendor scope |
| Encoder scaling boundary at high ratio | Pololu encoder note states 12 counts/rev on motor shaft, which scales to about 1807 counts/rev at output for 150.58:1. | Applies when selecting integrated encoder variants or external closed-loop control assumptions. | Validate MCU counter bandwidth and filtering plan before freezing loop frequency. | Known with boundary |
| Continuous-duty near-stall risk | Pololu FAQ guidance recommends keeping continuous operation around/below ~25% of stall current/torque and warns high-ratio gears can be damaged by prolonged stall. | Guidance is vendor-specific but directly relevant to `150 rpm` class micro gearmotor duty planning. | Treat stall-region operation as short-event exception only and enforce current-limit + duty-cycle gates. | Known with boundary |
| 12mm direct-drive boundary | maxon RE10 Part 256105 currently lists a 12V nominal point with 12,500 rpm no-load speed, 14,000 rpm max speed, 1.55 mNm nominal torque, 0.36A stall current, and NRND status. | Reference is one public PN, used as a class-level boundary indicator rather than a universal motor limit. | Use this PN for class-level boundary checks, not as default continuity-safe sourcing for mass-production RFQs. | Known |
| Stage-count tradeoff (GPX10) | maxon EN-373 catalog shows 1-5 stage efficiency falling from 90% to 59% and average backlash increasing from 1.5 degrees to 2.5 degrees, with 12,000 rpm continuous input speed limit. | Catalog data is platform-specific and explicitly provisional. | When selecting high ratios, reserve margin for stage losses/backlash growth and lock final commitments only on quote-controlled data. | Known with provisional boundary |
| Low-voltage driver path split | TI DRV8833 lists 2.7V minimum VM with 1.5A RMS / 2A peak, while TI DRV8212 lists 1.65V minimum VM with 4A peak and 1.65V / 1.30V UVLO thresholds in datasheet Rev.B. | DRV8212 product page emphasizes peak current; continuous thermal capability still requires datasheet + PCB thermal validation. | For 1.65V-2.7V programs, do not auto-reject architecture, but force a driver thermal validation gate before RFQ freeze. | Known with boundary |
| Startup UVLO recovery boundary (DRV8833) | DRV8833 datasheet sets VM undervoltage lockout around 2.6V falling with about 90mV hysteresis, and recommends >=10uF VM bulk capacitance. | Nominal rail checks are insufficient when startup surge causes transient droop. | Use startup waveform capture and UVLO recovery margin checks before freezing 2.7V-class driver paths. | Known |
| DRV8212 thermal and ripple boundary | DRV8212 datasheet Rev.B states current capability depends heavily on PCB/system thermal design, shows UVLO hysteresis around 80mV with about 3.8us UVLO deglitch, uses ~1.5x RDS(on) derating at 85C in thermal examples, and calls for local bulk capacitance sizing by system ripple targets. | Peak-current label (4A) does not provide continuous-current approval by itself. | Keep DRV8212 as a valid low-voltage option, but require thermal modeling + bench validation as a release gate. | Known with boundary |
| Nominal-ratio counterexample + stall-current margin | Pololu data shows nominal 150:1 corresponds to exact 150.58:1 and continuous operation should stay around or below ~25% of stall current/torque region. | Tolerance and load guidance are vendor-family-specific but directly illustrate common micro-gearmotor pitfalls. | Do not commit exact output rpm from nominal labels and avoid designing continuous operation close to stall regions. | Known with vendor scope |
| Driver capability boundary | TI DRV8833 guidance lists 1.5A RMS continuous and 2A peak output current with 360mOhm combined HS+LS on-resistance. | Applies when DRV8833-class topology is selected for brushed 12mm systems. | Map estimator rated current to RMS limit and startup surge to peak limit before driver selection is frozen. | Known |
| Driver thermal interpretation rule | TI SLVA505A states motor-driver thermal stress is governed by RMS current and conduction losses scale with I^2 * RDS(on). | Rule is generic to MOSFET-based H-bridges and should be applied alongside each driver datasheet. | Do not treat peak-current labels as steady-state capability; run thermal checks on RMS current profile. | Known |
| Gearhead overload duty boundary | FAULHABER precision gearhead guidance limits intermittent torque use to short intervals and <=5% duty cycle, and recommends motor steady-state temperature around 60C-70C to protect lubricant life. | Applies as boundary guidance; exact duty allowances vary by gearhead family. | Treat intermittent torque as exception mode; force thermal + duty evidence in RFQ technical package. | Known with boundary |
| Brushed speed-life planning window | maxon brushed-motor selection guidance highlights ~4,000-9,000 rpm as an efficiency/life-friendly operating zone and reports life ranging from under 100 h to over 10,000 h depending on load and commutation system. | Values are architecture- and duty-dependent, so they are planning boundaries rather than guaranteed contractual metrics. | For low-speed targets, prefer gearhead architecture over forcing low-rpm direct-drive operation. | Known with boundary |
| RoHS scope boundary | Directive (EU) 2015/863 extends Annex II to 10 restricted substances, including four phthalates at 0.1%, with staged applicability dates in 2019 and 2021. | Applies to covered EEE categories and relevant exemption context. | RFQ compliance packs must include phthalate declarations, not just Pb/Cd/Hg style metal declarations. | Known |
| REACH article communication boundary | ECHA Candidate List news release dated 2025-06-25 reiterates Article 33/7 duties: communicate safe-use information above 0.1% w/w in articles and notify ECHA within six months from the inclusion date when Article 7(2) conditions apply. | Article 33 communication and Article 7(2) notification applicability depend on article-level composition and supply-chain role. | Add REACH article-level declarations and six-month notification checks to RFQ compliance gate, not only RoHS declarations. | Known |
| Candidate List vs intentions-registry boundary | As retrieved on 2026-05-09, Candidate List table shows 253 results while Registry of SVHC intentions (last updated 2026-02-04) shows 273 unique entries. | Registry entries reflect intentions-until-outcome and are not equivalent to legally effective Candidate List entries. | Use Candidate List counts for Article 33/7 and SCIP legal screening; use intentions registry for horizon-scanning only. | Known |
| SCIP execution boundary | ECHA SCIP guidance and Directive (EU) 2018/851 establish article-level submission duties for EU-supplied products containing Candidate List SVHC above 0.1% w/w. | Applies to article suppliers placing applicable products on the EU market; role and composition data define exact obligation path. | Add a dedicated SCIP checklist step (role, threshold, submission ID traceability) before procurement release. | Known with role boundary |
| Cross-factory parameter spread (same 12mm label) | TT Motor GM12-N20VA publicly lists 2.4-12V and max 0.5W, while TT GM12-N30VA lists ratio up to 1000; FAULHABER 12/5 lists torque up to 30mNm and exact ratio up to 161.384. | Each row is factory-specific public data and test context is not harmonized across brands. | Build RFQ comparison sheets with normalized test conditions (voltage, load, temperature, duty) before ranking factories. | Known with vendor scope |
| IE-class scope vs micromotor listings | IEC 60034-30-1 IE class scope covers line-operated AC motors (0.12-1000kW, 50-1000V) and excludes mechanical commutator DC motors; EU 2019/1781 scope similarly targets >50V, 0.12-1000kW induction motors. | Many 12mm brushed gearmotor listings are low-voltage DC and below this kW range. | Do not treat generic `IE2` wording on micromotor pages as direct evidence of EU ecodesign-class compliance. | Known |
| Certificate verification workflow capacity boundary | IAF CertSearch public access indicates 3/day search and 30/day verification limits, while ISO Survey states certificate counts are sourced from IAF CertSearch. | High-volume factory-shortlist projects can hit public-query limits if verification is deferred to late stages. | Schedule certificate verification early and log issuer/accreditation IDs as mandatory RFQ metadata. | Known with platform scope |
| Market-access timeline split (EU vs US forced-labour rules) | EU Regulation 2024/3015 entered into force on 2024-12-13 and generally applies from 2027-12-14, while U.S. UFLPA enforcement has been effective since 2022-06-21. | Applicability depends on destination market and importer role, not only on motor technical specs. | Add destination-market compliance branch in factory RFQ gates instead of one global checkbox. | Known with jurisdiction scope |
Pending confirmation / no reliable public data
Evidence is insufficient for strong conclusions in these areas.
| Open question | Why evidence is insufficient | Decision impact |
|---|---|---|
| Cross-vendor, normalized life curves for 12mm gear motor outputs under matched duty/load profiles. | Public datasets use different rigs, lubrication packages, and load profiles. | Cannot issue strong life claims; procurement should require PN-level endurance report. |
| Public standard linking alias phrase `12mm 6v n20 150 rpm micro torque gear box motor` to guaranteed electrical/thermal limits. | No reliable cross-vendor public standard was identified in this iteration. | Alias-wording-only purchasing remains high-risk without PN-level datasheets. |
| Backlash growth vs service life across different 12mm gearhead platforms. | Most public publications report initial backlash but not life-cycle drift under matched duty. | Backlash-sensitive applications need vendor endurance data before freezing architecture. |
| Continuous-current derating model for DRV8212-class low-voltage paths under specific PCB thermal designs. | Datasheet confirms method-level thermal dependencies, but no universal continuous-current number exists without board-specific thermal characterization. | Low-voltage rails can be misclassified as safe if peak-current figures are used without thermal qualification. |
| Cross-vendor normalized mapping from alias wording to LP/MP/HP-class electrical envelopes. | Public pages use inconsistent naming and test conditions; no harmonized registry links one alias phrase to one guaranteed 12mm N20 motor profile. | Procurement decisions based on search phrase alone can mis-spec current budget, output-speed tolerance, and thermal plan. |
| Public cross-market taxonomy proving all `N20`, `GA12-N20`, and `12mm gear motor` listings share the same package drawing. | Vendor pages use overlapping words but different gearbox dimensions, shaft lengths, voltage tables, and model-code conventions. | Alias normalization can guide content routing, but purchase release still needs drawing-controlled supplier PN evidence. |
| Universal performance profile for `12mm n20 gear motor` across marketplaces and factories. | The short alias describes a frame/gearbox family, while voltage, ratio, winding, and test fixture vary by supplier PN. | Do not quote the alias phrase alone; require PN-level datasheet and sample test data before release. |
| Public, factory-level pass-rate/PPM datasets for 12mm gearmotor production lots. | Accredited certification and catalog claims are public, but recurring lot-quality metrics are usually private between customer and supplier. | Factory ranking still needs NDA-backed process capability and outgoing-inspection evidence. |
Factory evidence and qualification gates
For `12mm dc gear motor factories` intent, published specs and market-access gates must be reviewed together.
Factory published-parameter snapshot
Values are source-dated and kept vendor-scoped. Unknown or non-harmonized test conditions remain explicit.
| Factory / reference | Published window | Retrieved | Boundary | Decision use | Source |
|---|---|---|---|---|---|
| TT Motor GM12-N20VA | 2.4-12V, 1-1200rpm, max 0.5W, 30-60mA continuous current | Accessed 2026-05-25 | Factory page does not provide one harmonized duty/temperature fixture aligned with other vendors in this table. | Use as sourcing lead only; request full PN datasheet with test conditions before quoting load/speed guarantees. | Open source |
| TT Motor GM12-N30VA | Ratio 3-1000, torque up to 0.1Nm | Accessed 2026-05-25 | Peak torque statement is not equivalent to continuous torque rating without duty-cycle context. | Add continuous/intermittent torque rows and gearbox-life evidence as RFQ mandatory fields. | Open source |
| Pololu 150:1 MP 6V reference | 150rpm no-load, 0.67A stall current, ratio 150.58:1 exact | Accessed 2026-06-04 | Distributor-family data is strong for variant comparisons but remains vendor-family specific. | Use as benchmark baseline for RFQ test plans, not as a universal 12mm-factory specification. | Open source |
| FAULHABER 12/5 gearhead | Torque up to 30mNm, intermittent up to 100mNm, input speed up to 5,000rpm, exact ratio up to 161.384 | Accessed 2026-05-25 | Premium-gearhead figures are not directly interchangeable with commodity N20-style catalogs. | Normalize by output torque, duty, backlash, and lifecycle requirements before cost ranking. | Open source |
Factory qualification gate table
Each gate links one dated fact to a concrete RFQ action.
| Gate | Dated fact | Risk if skipped | Required action | Reference |
|---|---|---|---|---|
| Accredited certificate authenticity gate | ISO Survey (published 2025-09-23) states certificate counts are sourced from IAF CertSearch. | Certificate screenshots without accreditation checks can hide expired or non-accredited claims. | Capture certificate number, issuing body, accreditation body, and CertSearch verification record in RFQ package. | https://www.iso.org/the-iso-survey.html |
| High-volume verification capacity gate | IAF CertSearch public limits are 3/day search and 30/day verification (accessed 2026-05-25). | Late-stage bulk checks can stall award timing when many candidate factories are screened simultaneously. | Front-load certificate verification during shortlist creation and store evidence snapshots. | https://support.iafcertsearch.org/iaf-certsearch-faq/iaf-certsearch-faq/transitioning-period-faq |
| IE-class applicability boundary gate | IEC 60034-30-1:2025 scope is 0.12-1000kW, 50-1000V line-operated AC motors, and excludes mechanical-commutator DC motors. | Treating `IE2` wording on micromotor listings as automatic regulatory compliance can cause wrong compliance claims. | Map each quoted motor to actual standard scope before accepting efficiency-class statements. | https://webstore.iec.ch/en/publication/91195 |
| EU ecodesign scope gate | EU Regulation 2019/1781 scope language targets induction motors without brushes above 50V and 0.12-1000kW. | Micromotor RFQs can inherit irrelevant compliance assumptions when scope is not checked. | Record “in-scope/out-of-scope + rationale” for each destination market compliance statement. | https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32019R1781 |
| Forced-labour market-entry timeline gate | EU Regulation 2024/3015 entered into force 2024-12-13 and generally applies from 2027-12-14; U.S. UFLPA enforcement has applied since 2022-06-21. | Factory acceptance can fail at customs if destination-market forced-labour controls are not planned upfront. | Branch RFQ compliance tasks by destination market (EU/US) and require traceability declarations before shipment. | https://eur-lex.europa.eu/eli/reg/2024/3015/oj/eng |
Alternative comparison
Use reproducible dimensions (voltage, torque, response, cost, fit) instead of generic claims.
Option comparison table
If a value is unavailable in your project context, keep it as N/A and request supplier evidence.
| Option | Voltage band | Torque band | Dynamic response | Cost class | Best-fit scenario | Boundary / counterexample |
|---|---|---|---|---|---|---|
| 12mm direct-drive (RE10-class reference) | 3V-12V (PN-specific) | 1-8 mNm (class-level planning range) | Very fast | Low to medium | Good for compact high-speed, low-load tasks | Counterexample: low-speed or sustained medium/high torque requests usually require gearing; brushed planning guidance highlights ~4k-9k rpm efficiency/life zone and RE10 Part 256105 is NRND. |
| 12mm motor + GPX10-class gearhead | 3V-12V (motor-dependent) | 35-1000 mNm (catalog stage-dependent) | Medium | Medium | Good when output torque and lower output rpm dominate requirements | High ratio adds efficiency/backlash penalties (max efficiency 90%->59%, backlash 1.5°->2.5°); catalog values are provisional. |
| 10x12 micro metal gearmotor class (commodity reference) | 3V-6V | Vendor- and ratio-specific | Fast | Low to medium | Useful for cost-sensitive builds needing common ratio options | Ratio nomenclature and tolerance must be read from exact-ratio tables, not nominal labels alone; continuous load should stay well below stall-current regions. |
| Mini BLDC + gearhead | 5V-12V | 15-120 mNm (architecture-dependent) | Fast | Medium to high | Better lifetime/noise at the cost of controller complexity | Often unsuitable for low-voltage and cost-constrained 12mm programs. |
Driver window and rail boundary
Low-voltage rails need explicit driver-window mapping, not one-line pass/fail labels.
Driver envelope table
Keep unknowns visible: peak-current labels alone are insufficient for continuous thermal approval.
| Driver path | VM window | Current window | Conduction reference | Best-fit use | Boundary / counterexample |
|---|---|---|---|---|---|
| TI DRV8833 | 2.7V-10.8V | 1.5A RMS / 2A peak | 360mOhm HS+LS | Mainstream low-voltage rails above 2.7V with known RMS profile and startup sag margin. | VM UVLO falls near 2.6V (about 90mV hysteresis). Rail droop can still trigger UVLO even when nominal VM is above 2.7V. |
| TI DRV8212 | 1.65V-12V | 4A peak (continuous value depends on thermal design) | 280mOhm HS+LS | 1.65V-2.7V rails that need integrated H-bridge path and lower conduction-loss reference. | Datasheet UVLO uses VCC thresholds (1.65V rising / 1.30V falling); current capability and ripple tolerance are PCB-dependent and must be validated. |
Risk and mitigation
Covers misuse risk, cost risk, and scenario mismatch risk with direct mitigation actions.
Risk matrix
| Risk | Impact | Probability | Mitigation path |
|---|---|---|---|
| Treating `12mm 6v n20 150 rpm micro torque gear box motor` alias phrase as a standardized performance specification | High | Medium | Require PN-level datasheet + drawing package and verify electrical constants before RFQ freeze. |
| Treating `12mm n20 gear motor` as a round 12mm motor envelope | High | Medium | Freeze housing and coupler geometry only after selected-PN drawing review; check 10x12mm gearbox profile, D-shaft geometry, connector protrusion, and ratio-specific length. |
| Substituting a 1000:1 N20 option into a housing validated on a lower-ratio sample | High | Medium | Treat 1000:1 as a package-length exception and require fit check plus end-stop torque/current limiting before approval. |
| Selecting ratio by nominal label only (ignoring exact ratio and tolerance) | High | High in high-ratio requests | Translate nominal ratio into exact-ratio/tolerance output-speed range and validate on load. |
| Interpreting driver peak-current rating as continuous current capability | High | Medium | Map estimated rated current to RMS limits and startup surge to peak limits, then run thermal checks with I^2 * RDS(on). |
| Operating above continuous gearhead torque envelope | High | Medium | Use vendor continuous/intermittent torque rows and duty-cycle limits as procurement gates. |
| Undersized startup current budget | High | Medium | Reserve >=2.4x rated current on driver + power path. |
| VM droop below motor-driver floor (or UVLO threshold) | Medium | Medium | Split low-voltage paths by driver floor (2.7V-class vs 1.65V-class), then verify transient droop and startup waveform on oscilloscope. |
| Nominal VM passes static check but fails UVLO during startup transients | High | Medium to high on weak battery rails | Validate UVLO margin with startup waveform capture and apply bulk-capacitance sizing from current-step + ripple targets. |
| Thermal drift at high duty cycle without endurance curves | Medium | Medium | Run duty derating and include enclosure thermal path review. |
| RoHS-only compliance assumed while REACH article obligations are skipped | High | Medium | Collect supplier declaration and exemption mapping plus REACH Candidate List article declarations (0.1% w/w communication and notification checks). |
| Using Registry of SVHC intentions count as if it were the legally effective Candidate List count | High | Medium | Log dataset type and date in compliance records; use Candidate List for legal obligations and reserve registry data for watchlist planning. |
| Candidate List legacy-page sunset during ECHA CHEM transition is not reflected in compliance evidence workflow | Medium | Medium | Add source-system/version tracking and refresh evidence from ECHA CHEM endpoints before any post-migration compliance sign-off. |
| REACH communication completed but SCIP submission duty is missed for EU article supply | High | Medium | Add explicit SCIP role/threshold review and require SCIP ID traceability before EU shipment release. |
| Using product-card peak current as continuous-current approval in low-voltage driver selection | High | Medium | Require datasheet thermal modeling and board-level validation before approving 1.65V-class paths for repetitive duty. |
| Using provisional catalog values as frozen procurement commitments | Medium | Medium | Treat catalog numbers as planning references and lock final commitments to supplier technical offers and drawings. |
| Selecting an NRND reference PN for new mass-production plans | High | Medium | Request active-production alternatives and lifecycle statements before awarding production RFQ. |
| Treating micromotor marketing `IE2` wording as direct regulatory proof | High | Medium | Check IEC/EU scope fit first (AC vs DC, voltage and kW envelope) before accepting IE-class claims in sourcing documents. |
| Factory certificates accepted without accreditation-path verification | High | Medium | Verify certificate IDs in IAF CertSearch and archive issuer/accreditation details in RFQ approval records. |
| Forced-labour compliance handled as one global checkbox across markets | High | Medium | Split compliance gates by destination market and apply EU 2027 timeline vs U.S. UFLPA active enforcement requirements separately. |
| Alias query interpreted as separate SKU | Medium | Medium | Keep one canonical URL and answer alias intent explicitly in FAQ. |
Pre-RFQ release gates
Each gate has a measurable check and a pass condition to prevent soft assumptions from entering purchase decisions.
Verification gate checklist
| Gate | Measurement | Pass condition | Reference basis |
|---|---|---|---|
| 150rpm loaded-speed gate | Measure output speed under real target torque, not only no-load bench condition. | Measured loaded-speed band is documented and accepted against tolerance; do not release based only on 150 rpm no-load headline. | Pololu 150:1 LP/MP/HP specs + datasheet tolerance notes |
| N20 package drawing gate | Verify gearbox cross-section, overall length by ratio, mounting screw limit, shaft length/diameter/flat, and encoder/connector protrusion against the selected PN drawing. | Assembly drawing matches the 10x12mm gearbox and 9mm x 3mm D-shaft assumptions; 1000:1 candidates account for +3.5mm length before tooling release. | Pololu category page + 2024 dimension drawing |
| Alias-to-RFQ field gate | Convert the phrase `12mm n20 gear motor` into structured fields: voltage, exact ratio, winding class, no-load/current tolerance, loaded torque-speed point, shaft/drawing, encoder, duty, and ambient. | Supplier comparison sheet has no blank engineering fields hidden behind the alias phrase. | Stage1b research delta + vendor datasheets |
| Motor-variant branch gate (LP/MP/HP) | Map selected PN to LP/MP/HP class and recalculate rail, current limit, and thermal margins. | Driver/power path is verified for variant stall-current envelope (0.36A to 1.6A at 6V family examples) with margin. | Pololu 150:1 LP/MP/HP specs |
| Current waveform gate | Capture startup peak and steady-state RMS current at min/nom/max voltage and target duty. | RMS current stays below selected driver continuous limit; startup peak respects pulse/thermal envelope. | TI DRV8833 + SLVA505A thermal interpretation |
| Rail-transient and UVLO gate | Record VM minimum and recovery behavior during startup at low-temperature and weak-battery conditions. | Startup droop stays above UVLO falling thresholds with recovery margin; if DRV8212-class path is used, control rail droops that approach UVLO longer than about 3.8us and keep VM ripple within the datasheet-oriented planning target before final validation. | TI DRV8833 + DRV8212 datasheets |
| Bulk-capacitance gate | Size and verify VM bulk capacitance from startup current step, expected pulse width, and allowable ripple. | Calculated and measured VM ripple is controlled (planning target <=10%), and minimum bulk-cap guidance is not below datasheet baseline values (for example >=10uF on DRV8833-class rails). | TI DRV8833 + DRV8212 power-supply sections |
| Gearhead duty gate | Map requested duty profile against continuous/intermittent torque definitions. | Intermittent overload remains short-interval and <=5% duty; continuous torque stays within rated envelope. | FAULHABER precision gearheads technical info |
| Steady-state thermal gate | Run stabilized thermal test at representative load and enclosure condition. | Motor steady-state temperature stays near 60C-70C guidance window for gearhead lubricant protection. | FAULHABER precision gearheads technical info |
| EU compliance gate | Collect RoHS Annex II + REACH Candidate List article declarations at PN and article level. | 0.1% w/w SVHC communication obligations are met and any required ECHA notification timeline is tracked. | EUR-Lex RoHS + ECHA Candidate List obligations |
| SVHC dataset-boundary gate | Record Candidate List count and Registry of SVHC intentions count with source URLs and retrieval dates in the compliance memo. | Procurement/legal decisions use Candidate List entries (253 from 2026-05-09 retrieval context), while intentions-registry counts (273, registry stamp 2026-02-04) are treated as horizon-scanning only. | ECHA Candidate List table + ECHA Registry of SVHC intentions |
| ECHA source-continuity gate | Track whether compliance evidence is sourced from legacy list pages or ECHA CHEM during migration. | Compliance records include source system and retrieval date; if release occurs after legacy-page sunset, refresh legal-duty evidence from ECHA CHEM endpoints before shipment approval. | ECHA Candidate List table + ECHA Registry transition banners |
| SCIP submission gate (EU article supply) | Determine supplier role, Candidate List concentration (>0.1% w/w) status, and EU market-placement timing for each article. | SCIP submission duty is resolved before shipment where required, and SCIP IDs are retained with procurement records. | ECHA SCIP + Directive (EU) 2018/851 |
| Accredited-certificate verification gate | Verify each shortlisted factory certificate against certification-body + accreditation-body records and archive retrieval timestamps. | Certificate metadata is complete and verification was completed before award freeze; verification workload stays within planned CertSearch capacity (3/30 public daily limits as baseline). | ISO Survey + IAF CertSearch FAQ |
| IE-class applicability gate | Map each efficiency or IE-class claim to standard scope (motor type, voltage, and kW range) before quoting compliance statements. | Claims are accepted only when the motor scope fits IEC/EU ranges (for IE class references, 0.12-1000kW and AC scope constraints are explicitly checked). | IEC 60034-30-1 + EUR-Lex 2019/1781 |
| Destination-market forced-labour gate | Branch due-diligence checks by destination market and verify applicable legal timeline before shipment planning. | EU-bound and U.S.-bound programs each have explicit forced-labour compliance artifacts and supplier traceability statements before PO release. | EUR-Lex 2024/3015 + U.S. CBP UFLPA |
Scenario examples
Each scenario includes assumptions, modeled output, and the minimum next action.
Scenario table
| Scenario | Assumption | Estimated result | Action |
|---|---|---|---|
| Alias query assumes one fixed 6V 150rpm motor profile | Buyer requests `12mm 6v n20 150 rpm micro torque gear box motor` as if LP/MP/HP variants were electrically identical. | Conditional with high mis-spec probability. | Force PN-level branch selection (LP/MP/HP), then re-run driver current and thermal gates per branch. |
| Marketplace N20 sample does not match housing drawing | Team treats `12mm n20 gear motor` as a round 12mm body and skips gearbox/shaft drawing verification. | Conditional with high mechanical-release risk. | Request selected-PN drawing and verify gearbox profile, output shaft, mounting screws, and ratio-specific length before tooling release. |
| High-ratio N20 option used as a torque shortcut | Program moves from 150:1 to 1000:1 expecting more usable continuous torque in the same housing. | Conditional with gearbox-damage and length-change risk. | Check exact ratio, overall length, end-stop current limit, and instantaneous torque boundary before approving the substitution. |
| 150 rpm target quoted as guaranteed loaded speed | Program copies 150 rpm no-load headline into contract without load-line interpolation. | Conditional fit with high spec-risk. | Document loaded-speed min/typ/max at target torque and include tolerance envelope in RFQ. |
| 150:1 variant selected near stall-zone duty | Duty profile keeps operating point close to stall-region torque for long intervals. | Conditional fit (gearhead optional). | Apply ~25% stall-region continuous-duty guardrail and verify current + temperature on endurance bench. |
| Low-voltage brushed path near 2.7V driver floor | 2.0V rail with DRV8833-class floor constraints and startup surge | Conditional with architecture split required. | Evaluate 1.65V-class driver path (or boosted rail) and validate continuous thermal behavior before RFQ lock. |
| Nominal 2.9V rail dips below UVLO at startup | Cold battery ESR + startup surge push VM below the 2.6V-class UVLO falling boundary. | Conditional with high startup-reset risk. | Increase bulk capacitance, reduce startup current profile, and verify VM minimum with oscilloscope before component freeze. |
| Startup surge passes bench, but RMS current exceeds driver thermal envelope | Estimated rated current >1.5A with repetitive duty; selected driver only has 2A peak margin. | Conditional to not recommended for production without driver change. | Re-select driver on RMS thermal rating, then validate with current waveform and temperature-rise tests. |
| RFQ drafted against RE10 Part 256105 only | Program treats RE10 reference PN as default production part without lifecycle screening. | Conditional with sourcing continuity risk. | Add active-PN alternatives and lifecycle statement requirement before RFQ release. |
| EU shipment uses RoHS declaration only | Compliance packet omits REACH Candidate List article-level communication checks. | Conditional with compliance gap risk. | Add Article 33 information flow and Candidate List notification review into the procurement release checklist. |
| EU article shipment has SVHC >0.1% w/w but no SCIP dossier | Supply chain completed REACH communication but skipped WFD/SCIP submission workflow. | Conditional with legal release risk. | Run SCIP duty determination and submit/trace SCIP IDs before shipment approval. |
Alias coverage anchors
Internal anchors keep `12mm n20 gear motor`, `12mm dc gear motor factories`, and `12mm 6v n20 150 rpm micro torque gear box motor` traffic on this canonical page without split routes.
12mm n20 gear motor: quick tool input12mm n20 gear motor: result interpretation12mm n20 gear motor: method and evidence12mm n20 gear motor: FAQ decisions12mm dc gear motor factories: quick tool input12mm dc gear motor factories: result interpretation12mm dc gear motor factories: method and evidence12mm dc gear motor factories: FAQ decisions12mm 6v n20 150 rpm micro torque gear box motor: quick tool input12mm 6v n20 150 rpm micro torque gear box motor: result interpretation12mm 6v n20 150 rpm micro torque gear box motor: method and evidence12mm 6v n20 150 rpm micro torque gear box motor: FAQ decisions
Decision FAQ
Questions are grouped by intent, not glossary-only definitions.
B2B application fit, OEM options, and inquiry handoff
Move from estimator output to executable sourcing with factory customization scope and compliance-ready RFQ preparation.
Application fit
Projects that match this page's pre-RFQ scope.
- Teams screening 12mm motor + gearhead options for compact drivetrain programs.
- Programs consolidating `12mm gear motor`, `12mm n20 gear motor`, `12mm dc gear motor factories`, and `12mm 6v n20 150 rpm micro torque gear box motor` on one canonical URL.
- Projects that need explicit direct-drive vs gearhead boundaries before RFQ submission.
OEM options
Customization knobs available from factory-side engineering.
- Winding/Kv and no-load-speed tuning to match your voltage and output-speed envelope.
- Gearhead ratio, stage count, backlash target, shaft geometry, and connector customization.
- Lead-wire, insulation, and packaging customization aligned to your assembly flow.
Trust and compliance
Evidence gates required before production commitment.
- Collect RoHS/REACH declarations with homogeneous-material granularity before order release.
- Validate startup surge, thermal rise, and duty-cycle life on PN-level samples.
- Keep this page as pre-RFQ guidance; final claims require manufacturer qualification files.
Related fit check
12mm n20 gear motor: canonical alias anchors12mm dc gear motor factories: alias anchors on canonical page12mm gear motor: jump to tool input12mm gear motor: methods and evidence10mm gear motor: adjacent frame-size benchmark12 volt dc motors small: compact architecture selector6V DC motor boundary tool and report1000 rpm small DC motor: geared-vs-direct fit tool/report10mm coreless motor: coreless-specific benchmark route10mm brushless motor: brushed-vs-brushless decision tool/report12mm brushless motor: same-frame commutation decision route10mm coin vibration motor: haptic fit tool and report10mm vibration motor: cross-family fit tool and decision report1020 brushed coreless motors: dedicated fit tool and report