Product categories for compact OEM sourcing, from 6mm-42mm brushed and BLDC planetary gear motors to encoder drives, miniature gearboxes, and custom assemblies.
Use this page as a pre-RFQ navigator: pick the product family, capture the correct engineering inputs, and move directly to sample validation criteria that buyers can approve.
Constraint-First Shortlist
Many RFQs begin with only one hard constraint: envelope, noise, positioning, torque, or a drawing-controlled interface. Use this shortlist to route the first conversation into a product page and the evidence needed before sampling.
| Starting Constraint | Product Shortlist | First Engineering Check | Proof to Prepare | Next Step |
|---|---|---|---|---|
| Fixed 6mm-12mm envelope or N20-class housing | Micro DC planetary gear motor | Can the gearbox length, shaft datum, and current limit fit the mechanism without forcing a housing redesign? | Maximum OD and length, shaft drawing, target voltage, loaded RPM, latch or fixture load, and annual volume. | Request CAD / STEP |
| Low-noise handheld, medical, or indoor device | Low-noise micro planetary motor | Does the gear material, grease, winding, and enclosure method hold the buyer-defined acoustic limit? | Noise target, distance and fixture method, duty cycle, enclosure condition, current limit, and sample test window. | Compare gear materials |
| Reversing motion, homing, or repeat positioning | Encoder micro planetary gear motor | Can feedback resolution, backlash, and cable routing support the controller and repeatability target? | Backlash limit, encoder CPR/PPR, controller input voltage, shaft load direction, move profile, and connector space. | Review backlash guide |
| Shock load, jam event, or higher torque density | High-torque miniature gear motor | Does the frame, gear material, shaft support, and thermal path survive the real load case rather than only a catalog torque point? | Load curve, peak or stall torque, duty cycle, shock assumption, radial load, voltage sag, and thermal limit. | Estimate ratio and torque |
| Drawing-based shaft, flange, harness, or module assembly | Custom OEM micro drive assembly | Which catalog platform can be modified before a full custom assembly, tooling, or validation package is needed? | 2D/3D drawing, shaft/flange datum, cable exit, connector, label and packing rules, forecast, and sample quantity. | Review OEM workflow |
Diameter RFQ Navigator
Use this matrix to narrow the first platform candidate by external diameter, product family, ratio range, torque window, gear material, and RFQ evidence. Values are buyer reference windows; the final winding, stage count, output speed, efficiency, and CAD envelope are confirmed against load profile and duty cycle.
| OD Class | Product Path | Ratio Window | Torque Reference | Gear Material | Best-Fit Buyer Use | RFQ Emphasis | Track |
|---|---|---|---|---|---|---|---|
| 6mm | Coreless / micro DC planetary gear motor | 5:1-700:1 reference window | 5-480 g.cm reference; approx. 10.8 mN.m stall check | POM, hybrid, or 4Cr13 metal stages by load and noise target | Endoscope tools, optical focus, micro servos, miniature valves, and handheld mechanisms. | Max length, shaft diameter, current limit, noise target, and installation clearance. | Standard RFQ |
| 8mm | Micro DC planetary gear motor | Compact 6-12mm platform review; final stack by drawing | Light-duty g.cm range; verify winding, gear stack, and duty | POM or hybrid stages for quiet compact mechanisms | Small locks, lab devices, medical handheld modules, compact adjusters, and optical trim. | Loaded speed, continuous torque, shaft/flange drawing, and duty cycle. | Standard RFQ |
| 10mm | Encoder micro planetary gear motor | 5:1-1000:1 reference window | 100 g.cm-1.5 kg.cm reference window | POM, hybrid, or metal stages when backlash and life rise | Precision instruments, miniature pumps, compact automation, and feedback drives. | Gear ratio, output RPM, encoder/Hall target, backlash limit, and connector space. | Standard RFQ |
| 12mm / N20 class | Micro DC planetary gear motor | 5:1-1000:1 reference window | 100 g.cm-1.5 kg.cm reference window | POM, hybrid, or metal stages by stall and noise requirement | Smart locks, vending locks, curtains, meters, and compact consumer OEM devices. | Torque margin, stall condition, output interface, annual volume, and cost target. | Standard RFQ |
| 16mm | Low-backlash micro planetary gear motor | 4:1-1500:1 reference window | 0.5-5.5 Nm reference window | Hybrid or metal stages for torque reserve and wear control | Robotics modules, medical devices, valve actuators, optical assemblies, and compact fixtures. | Life profile, noise/backlash limit, loaded current, and sample acceptance criteria. | Standard RFQ |
| 22mm | High-torque miniature gear motor | 4:1-1500:1 reference window | 0.5-5.5 Nm reference window | Metal gear stages for shock load, stall load, and service life | Service robots, AGV auxiliary motion, valve actuators, and industrial mechanisms. | Load curve, shock load, bearing support, feedback resolution, and thermal duty. | Standard RFQ |
| 36mm | Micro BLDC planetary gear motor | 3:1-512:1 reference window | 9.3-35 Nm reference window | Alloy, MIM, or hardened metal stages by load profile | AGV wheels, mower drive modules, heavy automation axes, and battery equipment. | Driver current limit, thermal path, radial load, shaft interface, and duty cycle. | BLDC / custom RFQ |
| 42mm | High-torque miniature gear motor | 3:1-512:1 reference window | 9.3-35 Nm reference window | Alloy, MIM, or hardened metal stages with shaft support review | Heavy compact actuators, drive wheels, outdoor equipment, and industrial axes. | Full load case, installation CAD, shaft interface, annual volume, and target lead time. | Custom RFQ |
Common neighboring frames such as 20mm, 24mm, 28mm, and 32mm are handled during RFQ review when the listed diameter class is close but not enough for torque, life, or thermal margin. Final feasibility, drawings, sample timing, and production pricing are confirmed after review of drawings, load profile, validation scope, and volume forecast.
Application Routing
Diameter defines the envelope, but the application decides which risk to validate first. Use this routing table to move from product browsing into the correct solution page, first product candidate, and RFQ evidence package.
| Application | Solution Route | First Product Candidate | Diameter Focus | Buyer Trigger | RFQ Evidence |
|---|---|---|---|---|---|
| Smart locks and compact access modules | Smart Lock & Smart Home Actuators | 10mm/12mm N20 DC planetary gear motor | 10mm/12mm N20 plus 6mm-16mm compact OD | Latch force, self-lock behavior, battery current, cable exit, and cycle life | Latch load curve, target open time, shaft/flange drawing, noise target, and annual volume |
| Medical handhelds, pumps, and instruments | Medical Devices | Low-noise or coreless compact planetary drive | 6mm/8mm/10mm compact low-noise platforms | Acoustic comfort, low current, smooth start, traceability, and validation files | Duty cycle, current limit, noise method, material-file scope, and sample test plan |
| Robotics, AGV, and auxiliary motion axes | Robotics & AGV | 16mm-42mm high-torque planetary motor | 16mm/22mm/36mm/42mm torque platforms | Torque reserve, backlash, shock load, feedback, radial load, and thermal duty | Payload, wheel or joint load, ramp angle, speed target, duty cycle, and feedback requirement |
| Smart valves and flow-control actuators | Valve Actuators | 16mm/22mm metal gear planetary drive | 10mm/12mm light valves; 16mm/22mm breakaway torque | Aged-valve torque, open time, hard end stops, sealing, and stall current | Valve torque curve, travel angle, voltage window, shaft interface, and life cycles |
| Optics, camera modules, and lab instruments | Optical Instruments | 6mm-12mm encoder micro planetary motor | 6mm/10mm/12mm positioning platforms | Backlash, repeatability, low vibration, feedback resolution, and connector space | Positioning resolution, backlash target, output RPM, shaft/flange drawing, and noise limit |
| Industrial automation, pumps, and dispensers | Industrial Automation | 10mm-42mm durable metal gear planetary drive | 10mm/12mm/16mm/22mm/36mm/42mm production platforms | Repeatable torque, duty cycle, jam protection, cable control, and EOL limits | Load curve, duty cycle, thermal rise, OQC criteria, connector drawing, and annual forecast |
Gear Material Selection
The same motor diameter can behave very differently once noise, stall load, backlash, heat, and wear targets are applied. Use the material guide to prepare the gear-stage assumptions buyers should include in the first RFQ.
Compact brushed DC planetary gear motors from 6mm to 42mm for OEM teams that need practical torque, simple control electronics, configurable ratios, and a clear path from sample validation to repeat production.
Best for high-volume OEMs that need reliable cost-performance motion, short sample cycles, and enough customization flexibility to lock the shaft, voltage, gear material, and cable interface before tooling.
Long-life brushless DC planetary gear motors for OEM products that need continuous duty, electronic speed control, low electrical noise, and better service life than brushed DC platforms in the same compact envelope.
Ideal for industrial, medical, and service devices where buyers need long duty cycles, predictable thermal behavior, and an agreed driver strategy before the mechanical package is released.
Closed-loop micro planetary gear motors with magnetic or optical feedback for OEM motion systems that need measurable speed, direction, homing, or positioning data instead of open-loop timing assumptions.
Best for robotics, automation, optics, and actuator teams that need supplier-supported feedback resolution, wiring control, and acceptance tests for repeatable movement.
Standalone precision planetary gearboxes from 6mm to 42mm for engineering teams that already have a motor platform but need a validated reduction stage, input pinion match, output interface, and production inspection plan.
For teams that already have a motor supplier but need high-quality reduction gearheads.
Fully integrated custom micro drive modules combining the motor, planetary gearbox, shaft, flange, encoder, wiring harness, connector, labels, and project-specific inspection gates under one production record.
For product teams looking to outsource a complete electromechanical subassembly to a single accountable supplier.
Low-inertia coreless micro motors paired with planetary gearheads for compact mechanisms that need smooth low-speed behavior, fast start/stop response, low cogging, and careful current control.
For designers needing rapid response times and smooth rotation at low speeds, especially where a small brushed motor can still meet the life target more simply than a BLDC system.
High-precision micro planetary gear motor assemblies engineered to reduce lost motion in reversing, indexing, optics, gimbal, and robotic positioning systems where backlash must be measured at the output under a defined load.
For mechatronics engineers where positional repeatability is a primary design constraint and where the team can define how backlash, stiffness, and repeatability will be measured in the final mechanism.
Acoustically optimized micro planetary gear motors using selected gear materials, grease, input-stage geometry, and fixture-aware testing for OEM products where motor noise affects comfort, perceived quality, or equipment acceptance.
For medical, consumer, and office-device OEMs where acoustic comfort is a product requirement and the buyer can define the dBA limit, test distance, enclosure, and operating load.
Heavy-duty miniature planetary gear motors with reinforced carriers, metal gear train options, and output support reviews for applications that need higher torque density without ignoring heat, shock, stall, and shaft loading limits.
For industrial equipment designers needing higher torque density in a small envelope, especially where the buyer can define continuous torque, peak torque, jam frequency, and controller cutoff behavior.
Durable micro planetary drives using powder metallurgy, machined steel, brass, or mixed metal gear stages when shock load, temperature, stall survival, humidity, or material compliance matters more than the lowest acoustic noise.
For engineers operating in harsh environments where plastic stages may be unsuitable and where material choice must be tied to temperature, shock, grease, corrosion, noise, and validation evidence.
| Product Family | Primary Buyer Focus | Key Metric | Why It Matters |
|---|---|---|---|
| Micro DC Planetary Gear Motor | Best for high-volume OEMs that need reliable cost-performance motion, short sample cycles, and enough customization flexibility to lock the shaft, voltage, gear material, and cable interface before tooling. | Diameter Range: 6mm - 42mm | Determines the physical space required for integration. |
| Micro BLDC Planetary Gear Motor | Ideal for industrial, medical, and service devices where buyers need long duty cycles, predictable thermal behavior, and an agreed driver strategy before the mechanical package is released. | Lifespan: 10,000+ hours | Important when maintenance access is limited in industrial or regulated device programs. |
| Encoder Micro Planetary Gear Motor | Best for robotics, automation, optics, and actuator teams that need supplier-supported feedback resolution, wiring control, and acceptance tests for repeatable movement. | Encoder CPR: 3 - 1000 CPR | Dictates the positioning resolution capability of the system. |
| Miniature Planetary Gearboxes | For teams that already have a motor supplier but need high-quality reduction gearheads. | Gear Ratio: 3:1 to 1000:1 | Determines the exact output speed and torque multiplication. |
| Custom OEM Micro Drive Assemblies | For product teams looking to outsource a complete electromechanical subassembly to a single accountable supplier. | Integration Level: Turnkey Modules | Reduces internal assembly work and keeps quality controls under one coordinated build plan. |
| Coreless Micro Planetary Gear Motors | For designers needing rapid response times and smooth rotation at low speeds, especially where a small brushed motor can still meet the life target more simply than a BLDC system. | Rotor Inertia: Extremely Low | Supports fast start/stop response. |
| Low Backlash Micro Planetary Gear Motors | For mechatronics engineers where positional repeatability is a primary design constraint and where the team can define how backlash, stiffness, and repeatability will be measured in the final mechanism. | Backlash: < 30 arc-minutes | Important for limiting lost motion in reversing systems. |
| Low Noise Micro Planetary Motors | For medical, consumer, and office-device OEMs where acoustic comfort is a product requirement and the buyer can define the dBA limit, test distance, enclosure, and operating load. | Acoustic Emission: < 45 dBA at 30cm | Helps compare samples against buyer-defined comfort or equipment noise targets. |
| High Torque Miniature Gear Motors | For industrial equipment designers needing higher torque density in a small envelope, especially where the buyer can define continuous torque, peak torque, jam frequency, and controller cutoff behavior. | Peak Torque Capability: Up to 3x nominal | Determines the ability to push through unexpected mechanical jams. |
| Metal Gear Micro Planetary Drives | For engineers operating in harsh environments where plastic stages may be unsuitable and where material choice must be tied to temperature, shock, grease, corrosion, noise, and validation evidence. | Operating Temperature: -30°C to +120°C | Metal gears can tolerate temperature and load conditions that may deform plastics. |
A selection of micro planetary gear motors, miniature gearboxes, and compact OEM drive assemblies from the product portfolio.
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.
Inquiry Email
Include OD/length, voltage, torque, loaded speed, ratio, drawings, quantity, and destination.
Instant Chat
+86 18857971991
Fast channel for clarifying specs, drawings, and sample timing.
