High-torque, low-backlash metal planetary gear motors for AGV/AMR drive wheels, service robot joints, robot vacuum chassis lift modules, inspection crawlers, and compact UAV or small robotic actuators.
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 |
|---|---|---|
| Torque Density | 16/22mm for mid-load modules; 36/42mm BLDC candidates for heavy drive axes | Helps select a motor frame that fits compact robot spaces without losing start torque or continuous torque margin. |
| Backlash Target | <8-12 arcmin economy, <3-7 arcmin high precision, <1-2 arcmin ultra-precision request review | Low-backlash targets reduce positioning drift in robot joints, lift modules, steering, and reversing drive cycles. |
| Radial and Axial Load Rating | By frame size, shaft geometry, bearing stack, and flange support | Defines whether drive wheel loads need reinforced output support. |
| Feedback Resolution | Encoder CPR, Hall signal, or controller-defined feedback | Supports odometry, speed matching, joint repeatability, stall detection, and production EOL signal checks. |
| Thermal Rise and Efficiency | Voltage, load, duty cycle, and chassis heat-path dependent | Battery-powered robots need enough torque reserve without overheating enclosed motor cavities. |
| Back-drive and Braking Behavior | Ratio, motor type, load, and brake strategy dependent | Determines if the AGV will roll down a ramp when power is cut. |
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 |
|---|---|---|---|
| Drive load and traction | Will the motor keep start torque and speed margin with the real payload, wheel, ramp, and voltage sag? | Payload, wheel diameter, ramp angle, ground speed, voltage window, current limit, and loaded current trace. | Starts cleanly at minimum voltage, meets loaded speed, and stays below agreed current and temperature limits. |
| Shock and gearbox survival | Can the gear stack survive wall contact, wheel impact, stall, or service-robot collision events? | Impact assumption, stall duration, controller current limit, shaft load direction, and post-test backlash check. | No tooth damage, no abnormal noise rise, and backlash or output play remains inside the agreed limit. |
| Feedback and navigation signal | Can the controller read stable Hall or encoder signals for odometry, speed match, or joint repeatability? | Encoder CPR, signal voltage, pinout, cable length, shielding route, driver input, and EOL signal criteria. | Signal edges remain stable under loaded motion, cable movement, and current spikes on the target controller. |
| Battery and thermal duty | Does the selected motor protect runtime and thermal margin during repeated start-stop missions? | Mission duty sequence, ambient temperature, enclosure heat path, current limit, and continuous/peak torque split. | Thermal rise stabilizes inside the buyer limit while duty-cycle current stays within the battery budget. |
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 |
|---|---|---|
| AGV/AMR wheel versus robot joint or lift axis | Use reinforced output bearings, metal gear stages, and BLDC or encoder feedback for wheel loads; use compact low-backlash DC or coreless builds for lighter joints, grippers, and lift modules. | Wheel load, radial force direction, shaft coupling, joint repeatability, lift load, and expected impact events. |
| Frame size and torque class | Review 16mm and 22mm gear motors for compact mid-load modules, then move to 36mm or 42mm BLDC planetary motors when continuous torque, payload, or wheel load rises. | Available diameter and length, output torque, speed target, ratio, thermal path, and life target. |
| Low backlash versus shock robustness and cost | Choose the lowest backlash class only where repeatability matters; high shock wheel modules may need a stronger metal gear stack and current limiting more than ultra-low backlash. | Backlash target in arcmin, reversing frequency, impact profile, acceptable cost band, and measurement method. |
| Closed-loop navigation requirement | Choose encoder or Hall feedback when odometry, speed matching, or stall detection must be confirmed by the controller. | Pulse count, voltage, controller input type, cable length, and target positioning resolution. |
| Battery runtime versus torque reserve | Compare BLDC and brushed planetary options against continuous torque, peak current, duty cycle, and thermal path. | Battery voltage window, current limit, duty sequence, ambient temperature, and chassis heat path. |
| Hold, brake, or freewheel behavior | Define whether the axis must hold position, resist back-drive, or coast freely before choosing ratio, motor type, brake strategy, or mechanical compliance. | Ramp angle, payload, power-cut state, emergency stop behavior, and acceptable rollback distance. |
| Stage | Control Point | Buyer Evidence |
|---|---|---|
| Motion axis requirement review | Classify the module as drive wheel, joint, lift, gripper, crawler, or UAV mechanism, then freeze torque, speed, backlash, feedback, and envelope targets. | Module drawing, torque-speed target, backlash target, feedback requirement, and operating sequence. |
| Backlash, torque, and impact validation | Measure output speed, current draw, backlash, thermal rise, noise, encoder signal stability, and shock response under representative load. | Sample test report with voltage, load, temperature, backlash method, impact notes, and feedback checks. |
| Cable, feedback, and thermal review | Validate connector pinout, cable strain relief, Hall or encoder signal quality, thermal path, and controller current limit before pilot tooling. | Pinout drawing, cable route, EOL signal criteria, current limit, and thermal run record. |
| Pilot and production release | Freeze shaft drawing, flange geometry, connector pinout, EOL speed/current/noise/backlash limits, packaging protection, and lot traceability. | Approved drawing revision, EOL criteria, lot label 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. Backlash must be treated as an application target, so the RFQ should include the arcmin or degree limit, torque load, direction changes, and measurement method.
State the allowed output free play under a known preload or torque condition. Economy, high-precision, and ultra-precision targets can be reviewed, but final values depend on frame size, ratio, gear material, and production tolerance.
BLDC is usually preferred when runtime, thermal margin, and closed-loop control matter. Brushed DC can still fit cost-sensitive or lighter duty modules when the duty cycle and life target are realistic.
Yes. Custom output shafts, flats, D-cuts, flanges, brackets, encoder options, Hall feedback, cable length, and connector pinouts can be reviewed from the module drawing.
Start-stop durability depends on load, shock, current limit, and thermal path; sample tests should reproduce the duty profile before release.
Yes, we offer integrated polyurethane (PU) wheels mounted directly to the planetary gearbox flange.
For high-risk environments, inline slip clutches, current limits, or mechanical compliance can be reviewed to reduce shock transfer into the gear teeth.
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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