RFQ Checklist
- Output speed (RPM) and output torque requirements
- Gearbox type (planetary/spur) and maximum diameter limit
- Radial and axial load applied to the shaft
- Backlash tolerance, noise limit, and lifetime cycles
Micro brushless gear motors combining compact planetary or spur gearboxes with BLDC efficiency for high-torque, low-speed actuation.
Best-fit buyer
For automation and actuator engineers who need high torque at low speeds without the wear issues of brushed gear motors.
Validate Before Sampling
RFQ Data That Changes the Quote
| Stage | Buyer Input | Factory / QC Checkpoint | Decision Output |
|---|---|---|---|
| RFQ feasibility review | Output speed (RPM) and output torque requirements; Gearbox type (planetary/spur) and maximum diameter limit | Balance motor speed and gear ratio against target output torque | Feasibility notes, missing parameters, and sample direction. |
| Sample definition and validation | Radial and axial load applied to the shaft; Backlash tolerance, noise limit, and lifetime cycles | Gearbox Backlash: 1° to 3° for planetary, < 10 arc-min for precision | Controlled sample scope with measurable acceptance criteria. |
| Pilot lot and repeat production | Pilot quantity, annual forecast, revision baseline, and destination | Stripped planetary gears from emergency stops: Evaluate the Maximum Permissible Dynamic Torque of the gearbox, not just the motor stall torque. | Pilot records tied to mechanical efficiency ($eta$) and outgoing inspection. |
| Metric | Typical Range | Why It Matters |
|---|---|---|
| Gearbox Backlash | 1° to 3° for planetary, < 10 arc-min for precision | Critical for trajectory precision in robotic joints and repeatability in medical dosing. |
| Mechanical Efficiency ($eta$) | 90% (1-stage) dropping to 60% (4-stage) | Directly determines the motor continuous torque required to reach the target output payload. |
| Output bearing load | Radial and axial load checked against shaft, gearhead, and duty cycle | Side load can shorten gearbox and bearing life even when torque looks acceptable. |
We can review motor-plus-gearbox assemblies and define the test scope around output speed, torque, backlash, load, duty cycle, and acceptance criteria before pilot supply.
Provide output speed, continuous torque, peak torque, duty cycle, backlash target, radial and axial load, package limit, voltage, feedback, and lifetime cycles.
Inquiry Email
Include motor type, OD, voltage, speed, load, quantity, and destination.