12mm/N20 and compact micro planetary gear motor assemblies for smart door locks, electric curtains, vending release modules, and building automation mechanisms.
Solution recommendations are confirmed by RFQ after the real load, envelope, quantity, and validation scope are reviewed.
Application Buyer Review Path
Application buyers usually need more than a product suggestion. Use this review path to connect mechanical fit, controls, quote scope, and validation evidence before a sample is approved.
| Buyer Role | Decision Check | Page Evidence | Next Step |
|---|---|---|---|
| Mechanical / System Engineering | Load path, available OD and length, shaft datum, flange geometry, cable exit, radial load, and mating CAD revision. | Application intake, implementation focus, selection logic, CAD/STEP panel, and related product routes. | Request CAD / STEP |
| Electrical / Controls | Voltage window, current limit, driver type, feedback signal, EMI concern, braking behavior, and duty cycle. | Evaluation matrix, feedback route, validation package, and sample test evidence request. | Review encoder options |
| Procurement / Program | Prototype quantity, annual volume, sample timing, quote scope, destination, and approved supplier workflow. | RFQ checklist, WhatsApp handoff, email template, export file scope, and related OEM support links. | Send RFQ |
| Quality / NPI | Drawing revision, CTQ dimensions, torque-speed test condition, noise/backlash method, EOL limits, and lot traceability. | Production and QC flow, risk controls, validation package, and buyer-defined evidence scope. | Quality evidence |
Application RFQ Intake
The first review should capture load, speed, space, validation, and compliance constraints, not just a motor part number. This keeps the recommended gear ratio, shaft, feedback, and test plan tied to the real machine.
| RFQ Input | Examples to Provide | Engineering Output |
|---|---|---|
| Load and motion profile | Continuous torque, peak torque, stall/jam event, stroke, angle, wheel load, or pump cycle. | Frames the motor diameter, winding, ratio, gear material, and torque reserve before sample selection. |
| Speed, timing, and ratio boundary | No-load RPM, loaded output RPM, actuation time, known ratio, or acceptable speed tolerance. | Creates the candidate ratio table with rated-load speed, current, efficiency, and thermal expectation. |
| Noise, backlash, and repeatability | dB limit, measurement distance, arcmin or degree backlash target, reversing frequency, positioning need. | Separates POM, hybrid, metal, low-backlash, encoder, and Hall-feedback paths early. |
| Envelope and interface control | Target OD, max length, shaft drawing, flange datum, cable exit, connector, mating CAD revision. | Prevents CAD/STEP mismatch and keeps shaft, mounting, harness, and packaging changes visible. |
| Validation and production scope | Prototype quantity, annual volume, life target, destination, RoHS/REACH, ISO file, packing rules. | Defines sample evidence, EOL test limits, compliance files, lead time, and production quote assumptions. |
| Evaluation Metric | Typical Range | Buyer Relevance |
|---|---|---|
| Frame Size | 10mm/12mm N20/N30 plus 6mm-16mm compact OD | Smart locks and home automation modules leave little space for motor length, cable bend radius, and gearbox diameter. |
| Actuation Duty Profile | Short intermittent unlock, pull, or dispense pulses | Short actuations require high stall margin without wasting battery capacity or overheating inside a sealed enclosure. |
| Self-lock Holding | Ratio- and mechanism-dependent | Door locks, curtains, and vending release mechanisms need defined holding or back-drive behavior after power is removed. |
| Cycle Life Target | Buyer-defined tens-of-thousands cycle target | Access-control and smart home products need repeated-cycle validation under real latch, rail, or spring loading before pilot approval. |
| Acoustic Target | Application-defined dB limit | Residential, hotel, and indoor automation products need quiet motion without sacrificing positive latch or rail movement. |
Sample Qualification Plan
These checks help engineering, procurement, and quality teams turn the application discussion into sample acceptance criteria before CAD freeze or pilot procurement.
| Workstream | Buyer Question | Evidence to Prepare | Pass Signal |
|---|---|---|---|
| Latch or rail force margin | Will the motor unlock, pull, or dispense under worst-case seal, curtain rail, or spring friction? | Load curve, torque peak, travel angle or stroke, actuation time, voltage sag, and current limit. | Completes the actuation inside target time at minimum voltage without current cutoff or missed reset. |
| Jam and end-stop behavior | Does the drive survive blocked latch, curtain end stop, or vending gate jam events? | Jam load, end-stop frequency, stall duration, controller cutoff logic, and post-test current/noise checks. | No gear damage or abnormal noise rise, and current cutoff protects the gearbox in the agreed blocked condition. |
| Battery and quiet indoor operation | Can the actuator stay quiet while preserving battery life across repeated access cycles? | Battery chemistry, pulse length, standby leakage limit, dB method, housing condition, and cycle count. | Actuation noise, current draw, and battery pulse budget remain inside buyer-defined limits through the test sequence. |
| Housing and harness fit | Will shaft, flange, cable exit, and connector fit the lock body or smart-home enclosure after CAD freeze? | Mating CAD, shaft profile, flange datum, cable bend radius, connector model, and installation sequence. | The sample installs without cable interference, shaft mismatch, or connector strain in the buyer assembly. |
Product Family Routing
A solution page should make the next product review obvious. Match the dominant application signal to a product family, then send the listed inputs so engineering can confirm the route.
| Application Signal | Recommended Product Route | Inputs to Confirm | Review |
|---|---|---|---|
| High torque, shock load, wheel load, breakaway torque, or jam condition | High-torque miniature gear motors or metal gear micro planetary drives with reinforced gear stack review. | Share continuous torque, peak torque, stall time, shaft load, duty cycle, and current limit. | High torque motors |
| Quiet patient-adjacent, indoor, optical, or residential motion target | Low-noise, coreless, POM, or hybrid gear stage route before moving to metal gears. | Share dB limit, measurement distance, enclosure condition, load, temperature, and life target. | Low noise motors |
| Positioning, odometry, repeatability, stall detection, or closed-loop control | Encoder or Hall-feedback planetary gear motor with defined signal and EOL checks. | Share CPR, signal voltage, controller input, cable route, pinout, and target resolution. | Encoder motors |
| Custom shaft, flange, connector, harness, bracket, or module packaging | Custom OEM micro drive assembly with drawing revision, tooling boundary, and production handoff. | Attach mating drawing, shaft profile, flange datum, connector model, packing rule, and annual volume. | OEM assemblies |
| Material, backlash, noise, and durability tradeoff is not frozen | POM, hybrid, MIM metal, or low-backlash route reviewed against the real application load. | Share noise target, reversing frequency, backlash limit, shock condition, grease concern, and cost band. | Material guide |
| Decision Point | Recommended Path | Validation Input |
|---|---|---|
| Smart lock versus curtain or vending load | Start from the real mechanism load case: latch release needs high short-pulse torque, curtains need smooth pull force, and vending modules need reliable spring or gate release. | Load curve, travel angle or stroke, actuation time, end-stop behavior, and reset condition. |
| 12mm/N20 envelope versus torque reserve | Use 10mm/12mm N20 or N30 platforms when envelope and cost dominate, then move to a larger gearbox only if torque, shaft load, or life margin requires it. | Available diameter, motor length, shaft load, torque peak, target speed, and mounting CAD. |
| Self-lock holding versus manual override | Review ratio, gear material, lubricant, and mechanical release path together so holding force does not block emergency or manual override requirements. | Holding torque, back-drive limit, load direction, power-off behavior, override force, and safety requirement. |
| Noise versus lock force | Use POM or hybrid low-noise stages for indoor comfort, and reserve metal stages for high latch force, shock load, or vending impact. | Noise limit, measurement distance, housing condition, torque peak, shock condition, and repeated-cycle friction data. |
| Battery current versus actuation time | Select winding and ratio around peak current, pulse duration, and standby leakage instead of optimizing no-load speed alone. | Battery chemistry, current limit, voltage sag, pulse length, duty interval, target actuation time, and driver protection. |
| Stage | Control Point | Buyer Evidence |
|---|---|---|
| Application requirement mapping | Translate smart lock, curtain, or vending mechanism loads into envelope, ratio, shaft, motor, wire, and gear material candidates. | Application load matrix, interface drawing, torque baseline, current limit, and assumption list. |
| Fixture-based sample validation | Check unlock, pull, or dispense current, stall margin, actuation time, noise, direction, holding behavior, and reset repeatability on a buyer-like fixture. | Sample report with voltage, load fixture, current, speed, noise, holding, and pass/fail mechanism notes. |
| Cycle-life and pilot control | Run the buyer-defined repeated-cycle plan and monitor current rise, noise drift, output play, gear wear, cable strain, and end-stop marks before pilot approval. | Cycle-life summary, inspection photos, EOL limits, and approved sample revision. |
| Production control | Apply EOL speed, current, noise, direction, and optional stall checks, then pack by revision to protect shafts, flanges, and cable exits. | EOL inspection limits, lot labels, packaging plan, and outgoing inspection record. |
Design Freeze Risk Check
Most application failures are not caused by the gear ratio alone. Close these checks before the motor family, drawing revision, and validation method are locked.
| Failure Mode | Early Signal | Prevention |
|---|---|---|
| Torque reserve disappears after the real fixture is installed | No-load speed looks acceptable, but current rises or motion stalls under seal friction, wheel load, spring force, or end-stop impact. | Quote against continuous, peak, and stall conditions with voltage sag, current limit, duty cycle, and thermal path included. |
| CAD fit passes once, then fails after shaft or connector revision | The gearbox OD fits the enclosure, but the shaft flat, flange datum, cable exit, connector, or bend radius changes late. | Freeze drawing revision, mating CAD, cable route, shaft datum, and connector clearance before pilot release. |
| Noise or backlash is rejected because the method was unclear | Buyer and supplier use different load, distance, preload, fixture, background noise, or backlash measurement conditions. | Define dB distance, load fixture, backlash preload, direction changes, and pass/fail limit before sample testing. |
| Thermal, EMI, or feedback issues appear only in pilot build | Bench samples pass, but enclosure heat path, controller current limit, cable routing, or encoder signal quality changes in the real device. | Validate the motor with buyer-like enclosure, driver, cable route, duty profile, and EOL signal checks. |
| Approved samples drift when the program moves to production | Prototype BOM, gear material, grease, label, packing, or EOL limit is not tied to an approved revision. | Keep approved sample record, BOM option, drawing revision, EOL criteria, lot labels, and outgoing inspection plan together. |
Validation Package
Application pages should lead toward drawings, sample evidence, and production assumptions. These files are scoped during RFQ so buyers know what can be verified before design freeze.
| Evidence | What It Includes | Buyer Use |
|---|---|---|
| Performance check | Voltage, no-load speed, rated-load speed, current, torque point, ratio, and temperature note. | Confirms the selected motor matches the required operating point before pilot procurement. |
| Mechanical file set | Outline drawing, shaft/flange revision, STEP/IGES availability, cable exit, connector, and label notes. | Lets mechanical teams freeze enclosure, mating part, harness route, and incoming inspection dimensions. |
| Application-specific test note | Noise, backlash, cycle life, thermal rise, radial load, EMI, or holding-force check as required. | Turns the market- or device-specific concern into a measurable sample approval criterion. |
| Production and export file | BOM option, EOL speed/current limits, RoHS/REACH or buyer file scope, packing, shipment destination. | Keeps repeat orders aligned after prototype approval and reduces qualification drift. |
CAD / STEP Request
Share the mating envelope and target duty data so sales engineering can confirm whether an existing outline drawing, STEP/IGES file, or custom shaft and flange proposal is suitable for your project.
Installation envelope, mounting pattern, shaft interface, and cable exit.
Voltage, loaded speed, torque, gear ratio, duty cycle, noise, and backlash limits.
Preferred CAD format, drawing revision, prototype quantity, destination, and compliance notes.
CAD files are shared by project fit and revision status. For custom shafts, flanges, cable routing, or gearbox interfaces, attach the mating drawing so the first CAD exchange uses the correct mechanical boundary.
Yes. Send the shaft profile, engagement length, housing drawing, and installation sequence so the shaft and flange can be matched to the lock, curtain, or release mechanism.
Often yes at platform level, but the ratio, shaft, wire exit, current limit, and validation fixture should be selected separately for each load case.
No. High ratios can improve back-drive resistance, but holding behavior depends on gear ratio, friction, load direction, lubrication, and the final mechanism.
Define the cycle count, voltage, load fixture, temperature, duty interval, end-stop condition, and pass/fail limits for current, noise, output play, and actuation time.
Brushed DC and coreless planetary motors are common when cost, short duty cycle, and compact size are the main constraints.
Measure torque margin, current draw, noise, direction, holding behavior, and repeated-cycle performance under the worst-case latch, curtain rail, or dispenser load.
Application Qualification Review
Send the application module, target load, speed, torque, envelope, voltage, quantity, drawing status, and validation concerns. Sales engineering can then confirm whether this solution route, another product family, or an OEM assembly path is safer.
WhatsApp: +86 18857971991. Email: [email protected].
Inquiry Email
Include OD/length, voltage, torque, loaded speed, ratio, drawings, quantity, and destination.
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+86 18857971991
Fast channel for clarifying specs, drawings, and sample timing.
