Compact micro planetary gear motors for smart locks, cabinet locks, and latch mechanisms where stall torque, noise, and battery current must be balanced.
| Evaluation Metric | Typical Range | Buyer Relevance |
|---|---|---|
| Frame Size | 6mm-16mm OD | Lock bodies leave little space for motor length, cable bend radius, and gearbox diameter. |
| Duty Profile | Short intermittent cycles | Short actuations require high stall margin without wasting standby battery capacity. |
| Acoustic Target | Application-defined dB limit | Residential and hotel locks need quiet operation without sacrificing positive latch movement. |
| Decision Point | Recommended Path | Validation Input |
|---|---|---|
| Torque margin for latch release | Start from worst-case unlock torque, then select ratio and frame size with stall margin instead of choosing by no-load RPM. | Latch torque curve, travel angle or stroke, target unlock time, and end-stop behavior. |
| Noise versus lock force | Use low-noise gear material or hybrid stages when acoustic comfort matters, and reserve metal stages for high seal friction. | Noise limit, measurement distance, housing condition, and repeated-cycle friction data. |
| Cable and shaft integration | Freeze shaft profile, flange datum, cable exit, and connector before pilot builds to avoid housing interference. | 2D shaft drawing, mating lock CAD, connector drawing, and installation sequence. |
| Stage | Control Point | Buyer Evidence |
|---|---|---|
| Mechanism review | Confirm latch force, travel, shaft engagement, and cable clearance against buyer CAD before sample configuration. | Approved interface drawing, torque baseline, and connector/cable option list. |
| Sample acceptance | Check unlock current, stall torque, noise, direction, and cycle repeatability under a buyer-like latch load. | Sample report with current, speed, noise, and pass/fail latch test notes. |
| Production control | Apply EOL speed/current/noise checks and pack by revision to protect shafts and cable exits. | EOL inspection limits, lot labels, packaging plan, and outgoing inspection record. |
Yes. Send the shaft profile, engagement length, and housing drawing so the shaft and flange can be matched to the lock mechanism.
Brushed DC and coreless planetary motors are common when cost, short duty cycle, and compact size are the main constraints.
Measure unlock torque margin, current draw, noise, and repeated cycle behavior under worst-case latch friction.
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