Precision Micro Planetary Gear Motors - OEM Customization for EU &amp; US Markets

Encoder micro planetary gear motor

Ratio Window: Compact 6-12mm platform review; final stack by drawing
Torque Reference: Light-duty g.cm range; verify winding, gear stack, and duty
Gear Material: POM or hybrid stages for quiet compact mechanisms
Best-Fit Buyer Use: Small locks, lab devices, medical handheld modules, compact adjusters, and optical trim.
RFQ Emphasis: Loaded speed, continuous torque, shaft/flange drawing, and duty cycle.

10mm

Standard RFQ

Ratio Window: 5:1-1000:1 reference window
Torque Reference: 100 g.cm-1.5 kg.cm reference window
Gear Material: POM, hybrid, or metal stages when backlash and life rise
Best-Fit Buyer Use: Precision instruments, miniature pumps, compact automation, and feedback drives.
RFQ Emphasis: Gear ratio, output RPM, encoder/Hall target, backlash limit, and connector space.

12mm / N20 class

Standard RFQ

Low-backlash micro planetary gear motor

Ratio Window: 5:1-1000:1 reference window
Torque Reference: 100 g.cm-1.5 kg.cm reference window
Gear Material: POM, hybrid, or metal stages by stall and noise requirement
Best-Fit Buyer Use: Smart locks, vending locks, curtains, meters, and compact consumer OEM devices.
RFQ Emphasis: Torque margin, stall condition, output interface, annual volume, and cost target.

16mm

Standard RFQ

Ratio Window: 4:1-1500:1 reference window
Torque Reference: 0.5-5.5 Nm reference window
Gear Material: Hybrid or metal stages for torque reserve and wear control
Best-Fit Buyer Use: Robotics modules, medical devices, valve actuators, optical assemblies, and compact fixtures.
RFQ Emphasis: Life profile, noise/backlash limit, loaded current, and sample acceptance criteria.

22mm

Standard RFQ

Micro BLDC planetary gear motor

Ratio Window: 4:1-1500:1 reference window
Torque Reference: 0.5-5.5 Nm reference window
Gear Material: Metal gear stages for shock load, stall load, and service life
Best-Fit Buyer Use: Service robots, AGV auxiliary motion, valve actuators, and industrial mechanisms.
RFQ Emphasis: Load curve, shock load, bearing support, feedback resolution, and thermal duty.

36mm

BLDC / custom RFQ

Ratio Window: 3:1-512:1 reference window
Torque Reference: 9.3-35 Nm reference window
Gear Material: Alloy, MIM, or hardened metal stages by load profile
Best-Fit Buyer Use: AGV wheels, mower drive modules, heavy automation axes, and battery equipment.
RFQ Emphasis: Driver current limit, thermal path, radial load, shaft interface, and duty cycle.

42mm

Custom RFQ

Custom Shaft and Flange Quality Controls

Ratio Window: 3:1-512:1 reference window
Torque Reference: 9.3-35 Nm reference window
Gear Material: Alloy, MIM, or hardened metal stages with shaft support review
Best-Fit Buyer Use: Heavy compact actuators, drive wheels, outdoor equipment, and industrial axes.
RFQ Emphasis: Full load case, installation CAD, shaft interface, annual volume, and target lead time.

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.

Fast RFQ Routing

Enter From the Detail the Buyer Already Knows

Some buyers know diameter first, others know the load, the CAD constraint, or the application failure risk. Route each starting point into the right page before asking for a formal quote.

Buyer Situation	Start Here	Route Next	Evidence to Send
Envelope is fixed, but ratio and torque are still open	Compare 6mm-42mm products	Request CAD / STEP	Maximum OD and length, shaft/flange drawing, target voltage, loaded RPM, torque, duty cycle, and quantity.
Torque, output speed, or gear ratio needs a first estimate	Open sizing calculator	Shortlist product families	Motor speed, target output RPM, load torque, efficiency assumption, stage count concern, and current limit.
Application risk is clearer than the motor type	Browse applications	Example: Robotics & AGV	Use case, load profile, noise or backlash requirement, duty cycle, environment, feedback need, and test method.
Noise, backlash, gear material, or life risk may decide the design	Compare POM vs metal gears	Align quality evidence	Acoustic limit, shock or stall event, grease constraint, life cycles, material preference, and acceptance limits.
The project is ready for sampling or supplier review	Open RFQ page	Review OEM workflow	Drawing revision, prototype quantity, annual forecast, destination, compliance scope, sample test plan, and timeline.

Envelope is fixed, but ratio and torque are still open

Start Here: Compare 6mm-42mm products
Route Next: Request CAD / STEP
Evidence to Send: Maximum OD and length, shaft/flange drawing, target voltage, loaded RPM, torque, duty cycle, and quantity.

Torque, output speed, or gear ratio needs a first estimate

Start Here: Open sizing calculator
Route Next: Shortlist product families
Evidence to Send: Motor speed, target output RPM, load torque, efficiency assumption, stage count concern, and current limit.

Application risk is clearer than the motor type

Start Here: Browse applications
Route Next: Example: Robotics & AGV
Evidence to Send: Use case, load profile, noise or backlash requirement, duty cycle, environment, feedback need, and test method.

Noise, backlash, gear material, or life risk may decide the design

Start Here: Compare POM vs metal gears
Route Next: Align quality evidence
Evidence to Send: Acoustic limit, shock or stall event, grease constraint, life cycles, material preference, and acceptance limits.

The project is ready for sampling or supplier review

Start Here: Open RFQ page
Route Next: Review OEM workflow
Evidence to Send: Drawing revision, prototype quantity, annual forecast, destination, compliance scope, sample test plan, and timeline.

Customization Range

Tune the Motor Around the Assembly, Not the Other Way Around

A viable compact drive usually depends on mechanical interfaces, winding and feedback choices, and gearbox behavior. Use the RFQ stage to define these boundaries before sample tooling starts.

Area	What Can Change
Mechanical fit	Output shaft length, D-cut, thread, cross-hole, key feature, flange, mounting holes, gearbox length, housing orientation.
Electrical package	Rated voltage, winding, no-load and loaded speed, current limit, cable length, terminal, JST/Molex-style connector, pinout.
Feedback and control	Magnetic or optical encoder, Hall sensor, CPR/PPR target, AB or ABZ output, logic voltage, shielded lead requirements.
Gearbox behavior	Gear ratio, POM or metal gears, low-noise grease, low-backlash carrier, peak torque margin, life-test profile.

Mechanical fit

What Can Change: Output shaft length, D-cut, thread, cross-hole, key feature, flange, mounting holes, gearbox length, housing orientation.

Electrical package

What Can Change: Rated voltage, winding, no-load and loaded speed, current limit, cable length, terminal, JST/Molex-style connector, pinout.

Feedback and control

What Can Change: Magnetic or optical encoder, Hall sensor, CPR/PPR target, AB or ABZ output, logic voltage, shielded lead requirements.

Gearbox behavior

What Can Change: Gear ratio, POM or metal gears, low-noise grease, low-backlash carrier, peak torque margin, life-test profile.

Sample to Production Path

De-Risk the Program Before Batch Orders

Plan the work in stages so engineering, procurement, and quality teams know what evidence is needed before each approval gate.

Step 01

Spec review

Usually 1-2 business days

Confirm diameter, length, loaded output speed, torque, duty cycle, noise, backlash, drawing status, and quantity target.

Step 02

Engineering sample

7-15 days for platform review; 2-3 weeks for deeper sample work

Modify standard gear ratio, winding, shaft, flange, cable, or feedback package and return measurable sample evidence.

Step 03

Pilot build

After sample sign-off

Lock inspection items, acceptance limits, packaging, labeling, revision control, and pilot quantity before ramp.

Step 04

Repeat production

Forecast and batch schedule

Maintain end-of-line checks, lot records, outgoing inspection, export packaging, and shipment timing for repeat orders.

Quality Control

Inspection Points to Agree Before Sampling

Review Quality Plan

Checkpoint	Typical Checks	Buyer Value
Incoming material	Gear material, bearings, magnets, shafts, windings, housings	Reduces lot variation before assembly starts.
Gearbox assembly	Gear mesh, carrier fit, lubrication, axial play, backlash target	Protects noise, wear, and reversing accuracy.
Electrical and load test	No-load current, speed, load behavior, temperature rise, noise	Confirms the sample performs under the expected duty window.
Outgoing inspection	Visual check, label, packing, batch record, drawing revision	Keeps repeat shipments traceable for procurement teams.

Incoming material

Typical Checks: Gear material, bearings, magnets, shafts, windings, housings
Buyer Value: Reduces lot variation before assembly starts.

Gearbox assembly

Typical Checks: Gear mesh, carrier fit, lubrication, axial play, backlash target
Buyer Value: Protects noise, wear, and reversing accuracy.

Electrical and load test

Typical Checks: No-load current, speed, load behavior, temperature rise, noise
Buyer Value: Confirms the sample performs under the expected duty window.

Outgoing inspection

Typical Checks: Visual check, label, packing, batch record, drawing revision
Buyer Value: Keeps repeat shipments traceable for procurement teams.

Which Product Family Fits Your Constraint?

Use this matrix to compare architecture fit, buyer profile, and core metrics before opening a detailed RFQ thread.

Family	Best Fit	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.

Micro DC Planetary Gear Motor

Best Fit: 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.
Key Metric: Diameter Range: 6mm - 42mm
Why It Matters: Determines the physical space required for integration.

Micro BLDC Planetary Gear Motor

Best Fit: 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.
Key Metric: Lifespan: 10,000+ hours
Why It Matters: Important when maintenance access is limited in industrial or regulated device programs.

Encoder Micro Planetary Gear Motor

Best Fit: Best for robotics, automation, optics, and actuator teams that need supplier-supported feedback resolution, wiring control, and acceptance tests for repeatable movement.
Key Metric: Encoder CPR: 3 - 1000 CPR
Why It Matters: Dictates the positioning resolution capability of the system.

Miniature Planetary Gearboxes

Best Fit: For teams that already have a motor supplier but need high-quality reduction gearheads.
Key Metric: Gear Ratio: 3:1 to 1000:1
Why It Matters: Determines the exact output speed and torque multiplication.

Custom OEM Micro Drive Assemblies

Best Fit: For product teams looking to outsource a complete electromechanical subassembly to a single accountable supplier.
Key Metric: Integration Level: Turnkey Modules
Why It Matters: Reduces internal assembly work and keeps quality controls under one coordinated build plan.

Coreless Micro Planetary Gear Motors

Best Fit: 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.
Key Metric: Rotor Inertia: Extremely Low
Why It Matters: Supports fast start/stop response.

Low Backlash Micro Planetary Gear Motors

Best Fit: 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.
Key Metric: Backlash: < 30 arc-minutes
Why It Matters: Important for limiting lost motion in reversing systems.

Low Noise Micro Planetary Motors

Best Fit: 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.
Key Metric: Acoustic Emission: < 45 dBA at 30cm
Why It Matters: Helps compare samples against buyer-defined comfort or equipment noise targets.

High Torque Miniature Gear Motors

Best Fit: 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.
Key Metric: Peak Torque Capability: Up to 3x nominal
Why It Matters: Determines the ability to push through unexpected mechanical jams.

Metal Gear Micro Planetary Drives

Best Fit: 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.
Key Metric: Operating Temperature: -30°C to +120°C
Why It Matters: Metal gears can tolerate temperature and load conditions that may deform plastics.

Durable 10mm, 12mm, 16mm, 22mm, 36mm, and 42mm micro planetary gear motors for compact industrial automation modules, smart meters, metering pumps, dispensers, fixtures, and enclosed 12V/24V OEM equipment.

Frame and Torque Class: 10/12mm to 36/42mm

View application fit →

Engineering Decision Hub

Convert Technical Research Into a Faster RFQ

Use these engineering tools and guides before sending drawings or sample requests. They turn open questions about ratio, torque, gear material, CAD fit, backlash, reliability, and second-source sourcing into clearer RFQ evidence.

Start with calculator Request CAD / STEP

Sizing Tool

Gear Ratio & Torque Calculator

Estimate output RPM, torque multiplication, stage count, and efficiency before asking for a quote.

Use when voltage, motor speed, target ratio, load torque, and duty cycle are still being narrowed.

Open calculator

Material Decision

POM vs MIM Metal Gears

Compare plastic, hybrid, MIM, and machined metal gear routes by noise, torque, life, and cost risk.

Use when the program is balancing quiet operation against shock load, stall events, or wear margin.

Compare materials

Mechanical Evidence

CAD / STEP Request

Turn an envelope, shaft, flange, cable exit, or connector question into a clearer engineering review.

Use before sample work when the motor has to fit a fixed housing, fixture, lock, valve, or instrument.

Prepare CAD request

Second-Source Strategy

Maxon / FAULHABER Alternative

Evaluate when a China-built custom micro drive can support cost-down, localization, or supply resilience.

Use when the buyer needs premium-brand benchmarking without claiming one-to-one replacement.

Review alternative path

Accuracy Risk

Backlash Measurement Guide

Define how to measure reversing play, fixture stiffness, load direction, and acceptance limits.

Use for optics, robotics, valves, metering, and any mechanism where repeat positioning matters.

Read backlash guide

Reliability Review

Premature Failure Analysis

Map early gearbox failure back to overload, lubrication, gear material, heat, shock, or assembly causes.

Use when sample testing exposes noise growth, stripped gears, current drift, heat rise, or life-test gaps.

Read failure guide

Inquiry Parameters

Send the Constraints That Drive Motor Selection

A concise RFQ speeds up feasibility feedback, sample timing, and quote accuracy. Include drawings where available, even if they are still provisional.

Open RFQ Page

01Target outer diameter and maximum length

02Rated voltage and available current

03No-load speed and loaded output speed

04Required continuous torque and peak or stall torque

05Gear ratio or target output RPM

06Duty cycle, expected life, and operating temperature

07Noise and backlash limits if applicable

08Shaft, flange, mounting, or housing drawing

09Encoder, Hall sensor, cable, and connector requirements

10Prototype quantity, annual quantity, destination, and compliance notes

Knowledge Base

Latest Engineering Guides

Practical buyer-side checklists, decision frameworks, and technical insights from our motion engineering team.

How to Calculate Planetary Gear Ratio and Output Torque

A practical engineering guide to calculating planetary gear reduction ratio, output speed, output torque, efficiency losses, stage count, and RFQ data for micro planetary gear motor projects.

2026/08/05

Gear Motor Failure Analysis: Micro-pitting and Tooth Flank Wear in Micro Planetary Gearboxes

Diagnose micro planetary gearbox failures by reading wear patterns, micro-pitting, lubricant breakdown, backlash growth, shaft loads, and validation data before pilot release.

How to Choose the Right Micro Planetary Gear Motor for Your Application

A comprehensive buyer-side engineering guide on sizing, torque requirements, gear materials, and selecting the optimal micro planetary gear motor architecture.

Chat with Engineers Send RFQ by Email

Explore All Guides→

Procurement Quick Facts

Ranges to plan samples, pilot runs, and repeat supply discussions.

7-15 Days

Platform Prototype Review

For standard-platform modifications after specification approval; full custom tooling is confirmed by RFQ.

4-6 Weeks

Mass Production

Typical batch window after sample sign-off and revision lock.

1,000 Pcs

Pilot MOQ Target

Confirm by platform, tooling scope, and demand forecast.

EOL Checks

Defined End-of-Line Checks

Current, speed, direction, noise, and packing checks scoped by program.

Frequently Asked Technical Questions

RFQ and Prototype Support

Send the Parameters for Engineering Review

Share the constraint set, drawing status, quantity, and schedule so we can recommend a motor family, customization path, sample lead time, and quote basis.

Inquiry Email

[email protected]

Email app

Include OD/length, voltage, torque, loaded speed, ratio, drawings, quantity, and destination.

Instant Chat

+86 18857971991

Chat on WhatsApp

Fast channel for clarifying specs, drawings, and sample timing.

6-42 mm Precision Drive Sourcing

Precision Micro Planetary Gear Motors - OEM Customization for EU & US Markets

From 6mm to 42mm. Low backlash, high torque, custom ratios, shafts, encoders, and prototype support for compact robotics, medical devices, smart actuators, and OEM automation.

6-42 mm ODDC / BLDC / coreless3:1-1000:1 ratiosEncoder / Hall options7-15 day platform reviewPilot to repeat production

Product Range First

Start with diameter, length, loaded speed, torque, and gear material before choosing a motor family.

Custom Interfaces

Shafts, flanges, windings, harnesses, connectors, encoders, and Hall sensors can be matched to your assembly.

Inspection Records

Incoming, assembly, current, speed, noise, and outgoing records aligned to buyer requirements.

Buyer-Critical Engineering Scope

Choose by Performance, Interface, Validation, and Supply Path

Confirm the range, customization scope, quality evidence, and production timing that usually decide whether a compact motor program can move into sampling.

Motor and Gearbox Range

DC, BLDC, coreless, encoder-equipped, low-noise, low-backlash, high-torque, metal gear, and gearbox-only configurations for compact assemblies.

Ratio and Interface Fit

Tune ratio, winding, shaft, flange, mounting geometry, cable, connector, encoder, Hall sensor, lubrication, and packaging around your design.

Validation Before Scale-Up

Plan current, speed, load, noise, backlash, temperature, life-test, and outgoing inspection records before approving samples.

Prototype and Batch Planning

Use a clear path from drawing review to samples, pilot quantity, revision control, packing, and repeat delivery.

Core Supply Window

Range, Torque, and Test Evidence

Use these high-level ranges to decide whether a standard platform can be modified or a deeper custom program is needed.

6-42 mm

6mm - 42mm

Outer diameter coverage for tight enclosures and compact mechanisms.

0.1-30 N-m

0.1 to 30 N·m

Typical project coverage from small precision mechanisms to compact actuators.

EOL QA

Traceable QA

Incoming, assembly, current, speed, noise, load, and outgoing records can be aligned to the RFQ.

Engineering Trust Path

Build Confidence Before You Release Annual Volume

Overseas OEM buyers need more than catalog pictures. The RFQ path should prove that the motor, gearbox, interface, test limits, and shipment controls can survive from prototype to repeat production.

Chat with Engineers on WhatsApp Review Quality & Testing

WhatsApp: +86 18857971991. Certification, PPAP/APQP, RoHS, REACH, and material-document scope should be confirmed during RFQ for each program.

Immediate engineering channel

WhatsApp-first RFQ clarification

Use WhatsApp when the buyer needs to clarify drawings, load profile, CAD scope, or sample timing before a formal PO package is ready.

Share OD, voltage, torque, speed, duty cycle, and drawing screenshots
Confirm whether a standard 6mm-42mm platform can be modified
Escalate CAD / STEP, shaft, flange, encoder, or harness questions early

Factory validation path

NPI gates before repeat production

Move from feasibility to samples, pilot build, and repeat supply with buyer-visible checkpoints instead of treating the first quote as the final design.

Requirement review, DFM, and failure-mode assumptions
Sample checks for speed, current, noise, backlash, temperature, and load
Pilot-run EOL limits, PFMEA/APQP-style risk list, and revision control

Inspection evidence

Controls tied to the approved sample

Agree measurable evidence at RFQ stage so quality teams can compare sample approval, pilot output, and recurring shipments by the same limits.

Incoming material, gear inspection, motor matching, and assembly checks
Program-defined EOL tests for direction, speed, current, noise, and wiring
Outgoing inspection, lot label, packing, and change-control records

NPI Workflow

Five Gates From Requirement Review to OQC

View OEM Capabilities

Gate	Buyer Input	Factory Evidence
01 Feasibility	Envelope, load, output RPM, torque, voltage, duty cycle, noise, backlash, and target quantity	Motor family, gear ratio, material route, feedback option, and risk questions for RFQ closure
02 DFM / DFMEA	2D / 3D drawing, shaft and flange datums, cable route, connector, sealing, and controller limits	Interface review, material tradeoff, assembly constraint notes, and first-article inspection focus
03 Engineering Sample	Prototype quantity, load fixture, acceptance method, test duration, and preferred report format	Loaded speed, current, temperature rise, noise, backlash, stall response, and feedback signal checks
04 Pilot / PPAP Scope	Pilot quantity, CTQ list, failure definition, packaging, label, and compliance document requirements	PFMEA/APQP-style risk list, EOL limits, fixture notes, outgoing inspection record, and sample sign-off
05 Repeat Supply	Forecast, delivery cadence, drawing revision lock, destination, and change-notice expectations	Lot traceability, OQC summary, revision control, packing standard, and shipment coordination

01 Feasibility

Buyer Input: Envelope, load, output RPM, torque, voltage, duty cycle, noise, backlash, and target quantity
Factory Evidence: Motor family, gear ratio, material route, feedback option, and risk questions for RFQ closure

02 DFM / DFMEA

Buyer Input: 2D / 3D drawing, shaft and flange datums, cable route, connector, sealing, and controller limits
Factory Evidence: Interface review, material tradeoff, assembly constraint notes, and first-article inspection focus

03 Engineering Sample

Buyer Input: Prototype quantity, load fixture, acceptance method, test duration, and preferred report format
Factory Evidence: Loaded speed, current, temperature rise, noise, backlash, stall response, and feedback signal checks

04 Pilot / PPAP Scope

Buyer Input: Pilot quantity, CTQ list, failure definition, packaging, label, and compliance document requirements
Factory Evidence: PFMEA/APQP-style risk list, EOL limits, fixture notes, outgoing inspection record, and sample sign-off

05 Repeat Supply

Buyer Input: Forecast, delivery cadence, drawing revision lock, destination, and change-notice expectations
Factory Evidence: Lot traceability, OQC summary, revision control, packing standard, and shipment coordination

Buyer Decision Points

What Engineering Buyers Need to Confirm First

Shortlist a micro drive by capability, custom fit, inspection evidence, and the path from sample approval to repeat production.

Product capability

Compact planetary drive packages

Select a platform by envelope, output speed, torque margin, gear material, and duty cycle before starting detailed RFQ.

6-42 mm outer diameter coverage
DC, BLDC, coreless, encoder, and gearbox-only options
Single-stage to multi-stage reduction planning

Customization range

Interfaces matched to your assembly

Bring the motor into your mechanical and electrical architecture without forcing a catalog shaft or wire exit.

D-cut, threaded, cross-drilled, extended, or drawing-based shafts
Custom flanges, mounting holes, cables, terminals, and connectors
Winding, voltage, speed, ratio, encoder, and Hall sensor matching

Quality control

Inspection gates buyers can request

Define acceptance evidence early so samples, pilot builds, and repeat production are judged by the same rules.

Incoming material and gear inspection
No-load current, speed, load, noise, and final checks
Batch records, sample sign-off, and outgoing inspection support

Engineering support

Prototype to repeat supply path

Use drawing review and sample feedback to lock the configuration before moving into pilot and volume production.

Application duty and constraint review
Sample modifications when standard platforms fit
Pilot-run and production lead-time planning

Featured Drive Units

Explore our core families of micro planetary gear motors and encoder-equipped compact drive assemblies.

View Full Portfolio→

Diameter RFQ Navigator

Choose the 6mm-42mm Platform Before Freezing Ratio or Torque

Request CAD review Estimate ratio Choose material Compare families

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

6mm

Standard RFQ

Coreless / micro DC planetary gear motor

Ratio Window: 5:1-700:1 reference window
Torque Reference: 5-480 g.cm reference; approx. 10.8 mN.m stall check
Gear Material: POM, hybrid, or 4Cr13 metal stages by load and noise target
Best-Fit Buyer Use: Endoscope tools, optical focus, micro servos, miniature valves, and handheld mechanisms.
RFQ Emphasis: Max length, shaft diameter, current limit, noise target, and installation clearance.

8mm

Standard RFQ

Encoder micro planetary gear motor

Ratio Window: Compact 6-12mm platform review; final stack by drawing
Torque Reference: Light-duty g.cm range; verify winding, gear stack, and duty
Gear Material: POM or hybrid stages for quiet compact mechanisms
Best-Fit Buyer Use: Small locks, lab devices, medical handheld modules, compact adjusters, and optical trim.
RFQ Emphasis: Loaded speed, continuous torque, shaft/flange drawing, and duty cycle.

10mm

Standard RFQ

Ratio Window: 5:1-1000:1 reference window
Torque Reference: 100 g.cm-1.5 kg.cm reference window
Gear Material: POM, hybrid, or metal stages when backlash and life rise
Best-Fit Buyer Use: Precision instruments, miniature pumps, compact automation, and feedback drives.
RFQ Emphasis: Gear ratio, output RPM, encoder/Hall target, backlash limit, and connector space.

12mm / N20 class

Standard RFQ

Low-backlash micro planetary gear motor

Ratio Window: 5:1-1000:1 reference window
Torque Reference: 100 g.cm-1.5 kg.cm reference window
Gear Material: POM, hybrid, or metal stages by stall and noise requirement
Best-Fit Buyer Use: Smart locks, vending locks, curtains, meters, and compact consumer OEM devices.
RFQ Emphasis: Torque margin, stall condition, output interface, annual volume, and cost target.

16mm

Standard RFQ

Ratio Window: 4:1-1500:1 reference window
Torque Reference: 0.5-5.5 Nm reference window
Gear Material: Hybrid or metal stages for torque reserve and wear control
Best-Fit Buyer Use: Robotics modules, medical devices, valve actuators, optical assemblies, and compact fixtures.
RFQ Emphasis: Life profile, noise/backlash limit, loaded current, and sample acceptance criteria.

22mm

Standard RFQ

Micro BLDC planetary gear motor

Ratio Window: 4:1-1500:1 reference window
Torque Reference: 0.5-5.5 Nm reference window
Gear Material: Metal gear stages for shock load, stall load, and service life
Best-Fit Buyer Use: Service robots, AGV auxiliary motion, valve actuators, and industrial mechanisms.
RFQ Emphasis: Load curve, shock load, bearing support, feedback resolution, and thermal duty.

36mm

BLDC / custom RFQ

Ratio Window: 3:1-512:1 reference window
Torque Reference: 9.3-35 Nm reference window
Gear Material: Alloy, MIM, or hardened metal stages by load profile
Best-Fit Buyer Use: AGV wheels, mower drive modules, heavy automation axes, and battery equipment.
RFQ Emphasis: Driver current limit, thermal path, radial load, shaft interface, and duty cycle.

42mm

Custom RFQ

Custom Shaft and Flange Quality Controls

Ratio Window: 3:1-512:1 reference window
Torque Reference: 9.3-35 Nm reference window
Gear Material: Alloy, MIM, or hardened metal stages with shaft support review
Best-Fit Buyer Use: Heavy compact actuators, drive wheels, outdoor equipment, and industrial axes.
RFQ Emphasis: Full load case, installation CAD, shaft interface, annual volume, and target lead time.

Fast RFQ Routing

Enter From the Detail the Buyer Already Knows

Some buyers know diameter first, others know the load, the CAD constraint, or the application failure risk. Route each starting point into the right page before asking for a formal quote.

Buyer Situation	Start Here	Route Next	Evidence to Send
Envelope is fixed, but ratio and torque are still open	Compare 6mm-42mm products	Request CAD / STEP	Maximum OD and length, shaft/flange drawing, target voltage, loaded RPM, torque, duty cycle, and quantity.
Torque, output speed, or gear ratio needs a first estimate	Open sizing calculator	Shortlist product families	Motor speed, target output RPM, load torque, efficiency assumption, stage count concern, and current limit.
Application risk is clearer than the motor type	Browse applications	Example: Robotics & AGV	Use case, load profile, noise or backlash requirement, duty cycle, environment, feedback need, and test method.
Noise, backlash, gear material, or life risk may decide the design	Compare POM vs metal gears	Align quality evidence	Acoustic limit, shock or stall event, grease constraint, life cycles, material preference, and acceptance limits.
The project is ready for sampling or supplier review	Open RFQ page	Review OEM workflow	Drawing revision, prototype quantity, annual forecast, destination, compliance scope, sample test plan, and timeline.

Envelope is fixed, but ratio and torque are still open

Start Here: Compare 6mm-42mm products
Route Next: Request CAD / STEP
Evidence to Send: Maximum OD and length, shaft/flange drawing, target voltage, loaded RPM, torque, duty cycle, and quantity.

Torque, output speed, or gear ratio needs a first estimate

Start Here: Open sizing calculator
Route Next: Shortlist product families
Evidence to Send: Motor speed, target output RPM, load torque, efficiency assumption, stage count concern, and current limit.

Application risk is clearer than the motor type

Start Here: Browse applications
Route Next: Example: Robotics & AGV
Evidence to Send: Use case, load profile, noise or backlash requirement, duty cycle, environment, feedback need, and test method.

Noise, backlash, gear material, or life risk may decide the design

Start Here: Compare POM vs metal gears
Route Next: Align quality evidence
Evidence to Send: Acoustic limit, shock or stall event, grease constraint, life cycles, material preference, and acceptance limits.

The project is ready for sampling or supplier review

Start Here: Open RFQ page
Route Next: Review OEM workflow
Evidence to Send: Drawing revision, prototype quantity, annual forecast, destination, compliance scope, sample test plan, and timeline.

Customization Range

Tune the Motor Around the Assembly, Not the Other Way Around

A viable compact drive usually depends on mechanical interfaces, winding and feedback choices, and gearbox behavior. Use the RFQ stage to define these boundaries before sample tooling starts.

Area	What Can Change
Mechanical fit	Output shaft length, D-cut, thread, cross-hole, key feature, flange, mounting holes, gearbox length, housing orientation.
Electrical package	Rated voltage, winding, no-load and loaded speed, current limit, cable length, terminal, JST/Molex-style connector, pinout.
Feedback and control	Magnetic or optical encoder, Hall sensor, CPR/PPR target, AB or ABZ output, logic voltage, shielded lead requirements.
Gearbox behavior	Gear ratio, POM or metal gears, low-noise grease, low-backlash carrier, peak torque margin, life-test profile.

Mechanical fit

What Can Change: Output shaft length, D-cut, thread, cross-hole, key feature, flange, mounting holes, gearbox length, housing orientation.

Electrical package

What Can Change: Rated voltage, winding, no-load and loaded speed, current limit, cable length, terminal, JST/Molex-style connector, pinout.

Feedback and control

What Can Change: Magnetic or optical encoder, Hall sensor, CPR/PPR target, AB or ABZ output, logic voltage, shielded lead requirements.

Gearbox behavior

What Can Change: Gear ratio, POM or metal gears, low-noise grease, low-backlash carrier, peak torque margin, life-test profile.

Sample to Production Path

De-Risk the Program Before Batch Orders

Plan the work in stages so engineering, procurement, and quality teams know what evidence is needed before each approval gate.

Step 01

Spec review

Usually 1-2 business days

Confirm diameter, length, loaded output speed, torque, duty cycle, noise, backlash, drawing status, and quantity target.

Step 02

Engineering sample

7-15 days for platform review; 2-3 weeks for deeper sample work

Modify standard gear ratio, winding, shaft, flange, cable, or feedback package and return measurable sample evidence.

Step 03

Pilot build

After sample sign-off

Lock inspection items, acceptance limits, packaging, labeling, revision control, and pilot quantity before ramp.

Step 04

Repeat production

Forecast and batch schedule

Maintain end-of-line checks, lot records, outgoing inspection, export packaging, and shipment timing for repeat orders.

Quality Control

Inspection Points to Agree Before Sampling

Review Quality Plan

Checkpoint	Typical Checks	Buyer Value
Incoming material	Gear material, bearings, magnets, shafts, windings, housings	Reduces lot variation before assembly starts.
Gearbox assembly	Gear mesh, carrier fit, lubrication, axial play, backlash target	Protects noise, wear, and reversing accuracy.
Electrical and load test	No-load current, speed, load behavior, temperature rise, noise	Confirms the sample performs under the expected duty window.
Outgoing inspection	Visual check, label, packing, batch record, drawing revision	Keeps repeat shipments traceable for procurement teams.

Incoming material

Typical Checks: Gear material, bearings, magnets, shafts, windings, housings
Buyer Value: Reduces lot variation before assembly starts.

Gearbox assembly

Typical Checks: Gear mesh, carrier fit, lubrication, axial play, backlash target
Buyer Value: Protects noise, wear, and reversing accuracy.

Electrical and load test

Typical Checks: No-load current, speed, load behavior, temperature rise, noise
Buyer Value: Confirms the sample performs under the expected duty window.

Outgoing inspection

Typical Checks: Visual check, label, packing, batch record, drawing revision
Buyer Value: Keeps repeat shipments traceable for procurement teams.

Which Product Family Fits Your Constraint?

Use this matrix to compare architecture fit, buyer profile, and core metrics before opening a detailed RFQ thread.

Family	Best Fit	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.

Micro DC Planetary Gear Motor

Best Fit: 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.
Key Metric: Diameter Range: 6mm - 42mm
Why It Matters: Determines the physical space required for integration.

Micro BLDC Planetary Gear Motor

Best Fit: 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.
Key Metric: Lifespan: 10,000+ hours
Why It Matters: Important when maintenance access is limited in industrial or regulated device programs.

Encoder Micro Planetary Gear Motor

Best Fit: Best for robotics, automation, optics, and actuator teams that need supplier-supported feedback resolution, wiring control, and acceptance tests for repeatable movement.
Key Metric: Encoder CPR: 3 - 1000 CPR
Why It Matters: Dictates the positioning resolution capability of the system.

Miniature Planetary Gearboxes

Best Fit: For teams that already have a motor supplier but need high-quality reduction gearheads.
Key Metric: Gear Ratio: 3:1 to 1000:1
Why It Matters: Determines the exact output speed and torque multiplication.

Custom OEM Micro Drive Assemblies

Best Fit: For product teams looking to outsource a complete electromechanical subassembly to a single accountable supplier.
Key Metric: Integration Level: Turnkey Modules
Why It Matters: Reduces internal assembly work and keeps quality controls under one coordinated build plan.

Coreless Micro Planetary Gear Motors

Best Fit: 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.
Key Metric: Rotor Inertia: Extremely Low
Why It Matters: Supports fast start/stop response.

Low Backlash Micro Planetary Gear Motors

Best Fit: 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.
Key Metric: Backlash: < 30 arc-minutes
Why It Matters: Important for limiting lost motion in reversing systems.

Low Noise Micro Planetary Motors

Best Fit: 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.
Key Metric: Acoustic Emission: < 45 dBA at 30cm
Why It Matters: Helps compare samples against buyer-defined comfort or equipment noise targets.

High Torque Miniature Gear Motors

Best Fit: 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.
Key Metric: Peak Torque Capability: Up to 3x nominal
Why It Matters: Determines the ability to push through unexpected mechanical jams.

Metal Gear Micro Planetary Drives

Best Fit: 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.
Key Metric: Operating Temperature: -30°C to +120°C
Why It Matters: Metal gears can tolerate temperature and load conditions that may deform plastics.

Typical Applications

12mm/N20 and compact micro planetary gear motor assemblies for smart door locks, electric curtains, vending release modules, and building automation mechanisms.

Frame Size: 10mm/12mm N20/N30 plus 6mm-16mm compact OD

View application fit →

Application

Mechanical Evidence

CAD / STEP Request

Turn an envelope, shaft, flange, cable exit, or connector question into a clearer engineering review.

Use before sample work when the motor has to fit a fixed housing, fixture, lock, valve, or instrument.

Prepare CAD request

Second-Source Strategy

Maxon / FAULHABER Alternative

Evaluate when a China-built custom micro drive can support cost-down, localization, or supply resilience.

Use when the buyer needs premium-brand benchmarking without claiming one-to-one replacement.

Review alternative path

Accuracy Risk

Backlash Measurement Guide

Define how to measure reversing play, fixture stiffness, load direction, and acceptance limits.

Use for optics, robotics, valves, metering, and any mechanism where repeat positioning matters.

Read backlash guide

Reliability Review

Premature Failure Analysis

Map early gearbox failure back to overload, lubrication, gear material, heat, shock, or assembly causes.

Use when sample testing exposes noise growth, stripped gears, current drift, heat rise, or life-test gaps.

Read failure guide

Inquiry Parameters

Send the Constraints That Drive Motor Selection

A concise RFQ speeds up feasibility feedback, sample timing, and quote accuracy. Include drawings where available, even if they are still provisional.

Open RFQ Page

01Target outer diameter and maximum length

02Rated voltage and available current

03No-load speed and loaded output speed

04Required continuous torque and peak or stall torque

05Gear ratio or target output RPM

06Duty cycle, expected life, and operating temperature

07Noise and backlash limits if applicable

08Shaft, flange, mounting, or housing drawing

09Encoder, Hall sensor, cable, and connector requirements

10Prototype quantity, annual quantity, destination, and compliance notes

Knowledge Base

Latest Engineering Guides

Practical buyer-side checklists, decision frameworks, and technical insights from our motion engineering team.

How to Calculate Planetary Gear Ratio and Output Torque

A practical engineering guide to calculating planetary gear reduction ratio, output speed, output torque, efficiency losses, stage count, and RFQ data for micro planetary gear motor projects.

2026/08/05

Gear Motor Failure Analysis: Micro-pitting and Tooth Flank Wear in Micro Planetary Gearboxes

Diagnose micro planetary gearbox failures by reading wear patterns, micro-pitting, lubricant breakdown, backlash growth, shaft loads, and validation data before pilot release.

How to Choose the Right Micro Planetary Gear Motor for Your Application

A comprehensive buyer-side engineering guide on sizing, torque requirements, gear materials, and selecting the optimal micro planetary gear motor architecture.