Hybrid Tool + ReportStage1b research update: 2026-04-20
Vibration Motor Fit Tool and Decision Report (includes `10 mm disc vibration motor` alias intent)
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.
Published: 2026-04-20 | Last updated: 2026-04-20 | Review cadence: quarterly
Tool layer: quick sizing input
Enter boundary-safe values first. Invalid input is blocked and recoverable.
Boundary: 2.0V to 5.0V (tool acceptance). 10mm ERM reference PN window: 2.3V to 3.6V.
Boundary: 8,000 to 15,000 rpm.
Boundary: 0.3G to 2.5G.
Boundary: 5% to 100%.
If the result is inconclusive, use the design-review CTA instead of forcing a procurement choice.
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 |
|---|---|---|---|
| Core conclusions cited only marketing listing values, without PN-level datasheet limits and test conditions. | High risk of treating class-level examples as hard qualification limits. | Added PN-level ERM/LRA datasheet boundaries (start voltage/current, max operating voltage, response timings, test-load context). | Closed in stage1b enhancement (2026-04-20) |
| Comparison section lacked concrete counterexample triggers for ERM-to-LRA migration. | High risk of selecting architecture by intuition instead of boundary data. | Added boundary trigger matrix with explicit limit, source, and minimum corrective action. | Closed in stage1b enhancement (2026-04-20) |
| Regulatory and shipping requirements for coin-cell consumer products were not represented in decision flow. | High risk of late-stage compliance rework or shipment blocking. | Added CPSC 16 CFR 1263 / UL 4200A and UN38.3 test-summary gates in risk+FAQ guidance. | Closed in stage1b enhancement (2026-04-20) |
| `10 mm disc vibration motor` alias intent was not explicitly answered on a canonical hybrid page. | High risk of duplicate routes and split keyword signals. | Built one canonical hybrid page at `/learn/vibration-motor` with alias anchors and FAQ coverage. | Closed in stage1b baseline (2026-04-20) |
| Tool guidance lacked numeric boundaries for voltage, rpm, amplitude, and duty. | High risk of using out-of-range requests as procurement-ready outputs. | Added strict input ranges, boundary state messaging, and alternate CTA paths. | Closed in stage1b baseline (2026-04-20) |
| Report layer had no reproducible ERM vs LRA decision table for 10mm disc use cases. | High risk of wrong actuator family selection during RFQ pre-screening. | Added comparison matrix with frequency/amplitude/driver-complexity/cost dimensions. | Closed in stage1b baseline (2026-04-20) |
| Battery suitability discussion ignored coin-cell current-class mismatch against motor start current. | Medium-to-high risk of false starts and brownout loops in compact designs. | Added explicit CR2032 baseline vs high-drain class notes and mitigation actions. | Closed in stage1b baseline (2026-04-20) |
Report summary: conclusions and key numbers
Core conclusions are paired with quantifiable context before deep-dive sections.
Canonical URL
/learn/vibration-motor
`10 mm disc vibration motor` is handled as alias_merge on one URL.
Alias volume (US)
0 / month
OpenSpec snapshot for this alias change (2026-04-07).
Router intent split
do 0.50 / know 0.50
Hybrid mode chosen because tool and report intent are balanced.
10mm ERM datasheet boundary
2.3V start max, 3.6V max op
Precision Microdrives 310-103.004 datasheet (R001-V003, 2021; accessed 2026-04-20).
10mm ERM electrical ceiling
90 mA rated max, 150 mA start max
With inertial test load, 310-103.004 datasheet (accessed 2026-04-20).
10mm LRA reference
2 Vrms @ 175 Hz, 0.5V start max
Precision Microdrives C10-100 datasheet (R006-PROD, 2024; accessed 2026-04-20).
Haptic driver rail
2.0V to 5.2V
TI DRV2605L datasheet Rev. D; LRA frequency support 125-300Hz.
Generic H-bridge rail
VM 0-11V, logic 1.8-7V
TI DRV8837 datasheet Rev. F (PWM IN1/IN2 interface).
CR coin-cell continuous drain
CR2032 0.2 mA / BR2032 0.03 mA
Panasonic coin-cell lineup document valid as of Sep 2022 (accessed 2026-04-20).
US compliance gate
16 CFR 1263 + UL 4200A-2023
CPSC Reese's Law guidance for products using button/coin batteries.
Who this is suitable for
- Need a fast go/no-go check for 10mm disc ERM under 2V to 5V rails.
- Need to map target feel (G) to realistic rpm/current bounds before RFQ.
- Need one canonical page that serves both keyword-intent execution and technical due diligence.
- Need explicit next action when result is conditional or boundary-failing.
Who this is not suitable for
- Safety-critical haptics that require certified reliability qualification data.
- Programs that need guaranteed lifetime without PN-level endurance reports.
- Architectures that mandate coin-cell direct drive with no power-path redesign.
- Final release sign-off without waveform, thermal, and adhesive validation.
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 |
|---|---|---|
| Frequency conversion | f(Hz) = rpm / 60 | Converts motor-speed input to vibration frequency for haptic target mapping. |
| Estimated RMS vibration | G_est ~= (rpm / 12200) * (V / 3.0) * env_factor | Uses a 10mm ERM reference point; output is screening-grade, not qualification-grade. |
| Operating current estimate | I_run ~= base + speed/load/duty penalties | Models current envelope needed for pre-RFQ power-path screening. |
| Startup current estimate | I_start ~= 1.9 * I_run (conservative screen) | Uses margin above one cited 10mm ERM ratio (~150mA/90mA ~= 1.67) to reduce false-safe screening outcomes. |
| Confidence score | Base 92 - boundary penalties | Penalizes high duty, high amplitude, and rail mismatch conditions. |
Source ledger
Time markers and certainty labels are mandatory for trust. Last refreshed: 2026-04-20.
| Source | Date | Coverage | Known / Unknown |
|---|---|---|---|
| data/keywords/vibration-motor_broad-match_us_2026-03-29.alias-merge-checklist.csv | 2026-03-29 | Alias mapping: `10 mm disc vibration motor` -> canonical `/learn/vibration-motor`. | Known |
| OpenSpec change: add-kw-10-mm-disc-vibration-motor-page | 2026-04-07 | No dedicated alias route, canonical-only merge decision. | Known |
| Precision Microdrives 310-103.004 datasheet (R001-V003) | 2021-03 (accessed 2026-04-20) | 3.0V rated, 3.6V max operating, 2.3V max start, 90mA max rated current, 150mA max start current, and dynamic lag/rise/stop timings. | Known |
| Precision Microdrives C10-100 LRA datasheet (R006-PROD) | 2024-06 (accessed 2026-04-20) | 10mm LRA reference includes 2Vrms rated operation at 175Hz, max start voltage 0.5Vrms, response timings, and resonance constraints. | Known |
| Precision Microdrives AB-028 comparison guide | Accessed 2026-04-20 | ERM vs LRA behavior and use-case framing for architecture-level comparison. | Known |
| TI DRV2605L datasheet (Rev. D) | 2024-10 (accessed 2026-04-20) | 2.0V-5.2V supply, integrated effect library, ERM closed-loop drive, and LRA frequency support (125-300Hz). | Known |
| TI DRV8837 datasheet (Rev. F) | 2020-03 (accessed 2026-04-20) | Brushed H-bridge path with VM 0V-11V and VCC 1.8V-7V; supports PWM/phase control but does not provide haptic effect libraries. | Known |
| Panasonic lithium coin battery overview/data table | Valid as of 2022-09 (accessed 2026-04-20) | CR2032 nominal 3.0V, 225mAh at 0.2mA continuous to 2.0V; BR2032 comparison baseline at 0.03mA continuous. | Known |
| CPSC guidance: Reese's Law for button cell or coin batteries | Guidance updated 2025-03-10 (accessed 2026-04-20) | U.S. consumer products with accessible button/coin batteries are expected to meet warning and child-resistance requirements under 16 CFR 1263 and labeling requirements under 16 CFR 1263.4. | Known with market scope (US consumer products) |
| CPSC final rule notice and compliance date | Published 2023-09-21 (accessed 2026-04-20) | CPSC states products must be tested to ANSI/UL 4200A-2023 and comply by 2024-03-19 for covered products. | Known with regulatory scope |
| IATA Knowledge Hub: lithium battery shipping | Published 2025-01-31 (accessed 2026-04-20) | Highlights that test summaries are required for lithium cells/batteries under UN38.3 context in shipping workflows. | Known with logistics scope |
| On-page estimator model | 2026-04-20 | Fast screening of current/thermal/confidence for tool-layer actioning. | Known |
| Supplier PN-level endurance reports (publicly sparse) | Pending | High-duty life curves and enclosure-coupled amplitude retention over time. | 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: 2026-04-20. Facts without stable public evidence stay in the pending block.
| Topic | New fact | Applicable condition | Decision effect | Certainty |
|---|---|---|---|---|
| 10mm ERM hard electrical limits | The cited 310-103.004 datasheet publishes 2.3V max start voltage, 3.6V max operating voltage, 90mA max rated current, and 150mA max start current. | Applies to that PN and listed inertial-load setup, not all 10mm ERM motors. | Requests above 3.6V or with insufficient startup-current margin are downgraded to boundary review/fallback. | Known with PN scope |
| ERM dynamic response boundary | The same ERM datasheet shows lag/rise/stop around 40ms / 87ms / 67ms and MTTF around 132.9 hours under vendor test conditions. | Frequency depends on actual drive voltage and load coupling. | Use ERM for alert-class haptics; for sharper transient response, force explicit LRA comparison before RFQ freeze. | Known with test-condition scope |
| 10mm LRA measurable counterexample | C10-100 datasheet lists 2Vrms @ 175Hz operation, 0.5Vrms max start, and faster lag (~11ms) than the cited ERM. | LRA behavior depends on resonance tracking and frequency control near the PN resonance. | When response sharpness or waveform fidelity is priority, route to LRA evaluation instead of forcing ERM. | Known with PN scope |
| Driver architecture boundary | DRV2605L supports ERM/LRA haptic control with 125-300Hz LRA frequency support, while DRV8837 is a generic H-bridge (VM 0-11V, VCC 1.8-7V). | A wide VM range does not imply haptic waveform quality or resonance control equivalence. | Keep DRV2605L-class path for nuanced haptics; reserve DRV8837-class path for simpler brushed-drive envelopes. | Known with architectural scope |
| Coin-cell chemistry boundary | Panasonic lists CR2032 capacity at 0.2mA continuous (225mAh) and BR2032 at 0.03mA baseline, far below typical motor startup bursts. | Capacity and baseline drain numbers are not direct pulse-current guarantees. | Coin-cell-only direct-drive is treated as conditional/not-fit unless power path is redesigned. | Known with chemistry and test-condition scope |
| Regulatory and logistics gate | CPSC guidance and final-rule notice specify U.S. requirements under 16 CFR 1263 / ANSI-UL 4200A-2023; IATA guidance highlights UN38.3 test-summary expectations for shipping flows. | Applies to covered consumer products and applicable battery-shipping channels. | Add compliance and shipping document checks before RFQ lock when coin cells are in-scope. | Known with jurisdiction and logistics scope |
Pending confirmation / no reliable public data
Evidence is insufficient for strong conclusions in these areas.
| Open question | Why evidence is insufficient | Decision impact |
|---|---|---|
| Long-cycle amplitude retention for 10mm discs bonded to real production housings. | Public datasets rarely include enclosure-coupled adhesive aging under matched duty cycles. | Cannot issue hard lifetime claims for amplitude drift without PN-level validation. |
| Cross-vendor acoustic spectra measured on identical fixture and mounting geometry. | Most public measurements are generated on different test rigs and filtering methods. | Noise comparisons remain directional; procurement decisions require your own bench data. |
| Battery aging impact on startup reliability for compact high-current bursts. | Open datasets do not normalize chemistry/temperature/state-of-health consistently. | Brownout and start-failure risk remains conditional until pack-level waveform capture. |
| Cross-vendor 10mm ERM-vs-LRA lifetime comparison on one unified fixture. | Public PN datasheets use different fixtures, waveforms, and duty assumptions, which blocks fair direct life ranking. | Architecture choice should use in-house A/B validation instead of a single normalized life claim. |
Alternative comparison
Use reproducible dimensions (voltage, amplitude, 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 |
|---|---|---|---|---|---|---|
| 10mm disc ERM (brushed) | 3.0V rated, 3.6V max op, 2.3V max start | 1.3G typ / 0.75G min (datasheet test load) | Lag 40ms, rise 87ms, stop 67ms (typical) | Low | General alerts and haptic cues in compact products. | 90mA rated max and 150mA start max constrain battery path; cited MTTF is test-condition specific. |
| 10mm LRA coin actuator | 2.0Vrms rated, 2.05Vrms max, 0.5Vrms max start | 1.5G typ / 1.0G min (datasheet test load) | Lag 11ms, rise 37ms, stop 21ms (typical) | Medium | Premium haptic profiles needing tighter effect consistency. | Requires resonance-aware drive; off-resonance or ERM-style drive can lose consistency quickly. |
| 12mm ERM disc | N/A (PN dependent; request supplier datasheet) | N/A (public fixture-normalized data unavailable) | Varies by PN and mounting stack | Low to medium | Higher-mass products where 10mm force margin is insufficient. | Larger diameter may break packaging constraints or raise audible output; no single public normalized baseline. |
| Dual 10mm ERM layout | N/A (architecture-specific rail design) | N/A (depends on phasing and fixture) | Pattern flexibility with control complexity | Medium | Products needing multiple haptic zones or stronger burst effects. | Current peaks, thermal load, and synchronization complexity increase substantially. |
Boundary trigger matrix
Each trigger includes a source-tied reason and a minimum executable action.
| Trigger condition | Why it matters | Source anchor | Minimum action |
|---|---|---|---|
| Input voltage > 3.6V for baseline 10mm ERM path | Cited ERM PN max operating voltage is 3.6V. | PMD 310-103.004 datasheet | Switch to high-voltage-qualified actuator/driver path or reduce rail before sample selection. |
| Input voltage < 2.3V for baseline 10mm ERM path | Cited ERM PN max start voltage is 2.3V with inertial load. | PMD 310-103.004 datasheet | Treat as startup-risk boundary; redesign power path or choose actuator with lower start threshold. |
| Predicted startup current exceeds battery burst capability | Coin-cell baseline continuous-drain classes are orders lower than startup bursts. | Panasonic CR/BR coin-cell table | Add reservoir/boost or move to battery architecture that can support startup transients. |
| Need sharp transient haptics with low lag/stop times | Cited LRA response timings are materially faster than cited ERM timings. | PMD C10-100 vs 310-103 datasheets | Run ERM/LRA A/B prototype with resonance-aware drive rather than forcing ERM-only path. |
| US consumer product uses replaceable coin battery access path | CPSC guidance cites 16 CFR 1263 + UL 4200A-2023 expectations for covered products. | CPSC guidance and final rule notice | Run compliance gate review before RFQ freeze to prevent redesign at launch stage. |
Risk and mitigation
Covers misuse risk, cost risk, and scenario mismatch risk with direct mitigation actions.
Risk matrix
| Risk | Impact | Probability | Mitigation path |
|---|---|---|---|
| Drive voltage below practical startup region for 10mm ERM | High | Medium to high | Treat <2.3V as boundary state; redesign rail or actuator class before sourcing. |
| Battery path cannot supply startup-current burst | High | High in coin-cell-only designs | Validate startup pulse on real pack; add reservoir/boost or change battery architecture. |
| Assuming generic H-bridge equals haptic driver capability | High | Medium | Separate motor-drive feasibility from haptic quality requirements; keep ERM/LRA control-fit review before driver freeze. |
| Target G set above realistic 10mm disc envelope | High | Medium | Shift to larger ERM, dual-motor layout, or LRA architecture as required. |
| High duty cycle causes thermal drift and amplitude drop | High | Medium | Apply duty derating, ramp profile, and thermal validation before release. |
| Mounting adhesive and enclosure coupling mismatch | Medium | Medium | Validate on final enclosure stack, not only free-air bench fixtures. |
| US coin-cell compliance gate discovered too late | High | Medium | When shipping to U.S. consumer channels, review 16 CFR 1263 and UL 4200A requirements during architecture phase, not at launch. |
| Missing UN38.3-aligned test-summary evidence for battery logistics | Medium to high | Medium | Collect battery transport documents and test summaries before pilot shipment planning. |
| Driver family selected without ERM/LRA control-fit check | Medium | Medium | Confirm actuator type, control mode, and supply envelope together in architecture review. |
| Alias intent interpreted as standalone route | Medium | Medium | Keep one canonical page and expose alias anchors across tool and FAQ sections. |
Scenario examples
Each scenario includes assumptions, modeled output, and the minimum next action.
Scenario table
| Scenario | Assumption | Estimated result | Action |
|---|---|---|---|
| Smartwatch alert module | 3.0V rail, 12,200 rpm target, 1.0G, 25% duty | Recommended with standard 10mm disc ERM class. | Request two PN samples and validate startup feel plus enclosure-coupled amplitude. |
| Coin-cell direct-drive prototype | CR2032-only rail, 12,000 rpm target, 1.1G, 30% duty | Conditional to not recommended depending pulse path. | Capture startup waveform and brownout behavior before selecting production BOM. |
| High-force handheld notification | 3.7V rail, 13,500 rpm target, 2.0G, 65% duty | Boundary review needed for 10mm disc class. | Evaluate 12mm ERM or LRA/dual-motor fallback architecture. |
| High-temperature enclosure | 3.0V rail, 12,000 rpm target, 1.2G, 50% duty, high ambient | Conditional due to thermal and adhesive risk. | Apply duty derating and run enclosure thermal validation. |
| Low-noise medical handheld | 3.3V rail, 10,500 rpm target, 0.8G, 35% duty, noise priority | Conditional with actuator-family comparison. | Run ERM vs LRA A/B test and choose based on measured acoustic profile. |
| US consumer wearable with replaceable coin cell | Coin-cell-powered alert product targeting U.S. consumer channels | Conditional pending compliance and transport evidence. | Run 16 CFR 1263 / UL 4200A check and collect battery shipping documentation before RFQ lock. |
Alias coverage anchors
Internal anchors keep `10 mm disc vibration motor` traffic on this canonical page without split routes.
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.
- Wearables, handheld controls, and alerts that target 10mm disc ERM-class vibration.
- Teams consolidating `vibration motor` and `10 mm disc vibration motor` intent on one canonical route.
- Projects needing early current and duty boundaries before supplier shortlist.
OEM options
Customization knobs available from factory-side engineering.
- Lead wire, FPC, connector, and adhesive stack customization for assembly flow.
- ERM/LRA actuator family selection with driver strategy alignment.
- Amplitude/noise/duty tuning through voltage profile and waveform ramp design.
Trust and compliance
Evidence gates required before production commitment.
- Collect RoHS/REACH declarations and battery shipping constraints at RFQ gate.
- Validate startup waveform, thermal rise, and adhesive retention on your enclosure stack.
- Treat this page as pre-RFQ guidance; final claims require supplier test packages.