32P 32 mm Planetary Gearbox - Technical Datasheet v1.0¶
Status: Approved for Public
Release date: 2026-09-28
The SigGear 32P is a 32 mm planetary gearbox platform with one- to four-stage configurations. The public data below is intended for preliminary selection and early mechanical design-in.
Key Specifications¶
| Parameter | Public value |
|---|---|
| Nominal outer diameter | 32 mm |
| Number of stages | 1-4 |
| Gearbox length range | 28.05-52.95 mm |
| Reduction ratio range | 3.5:1-509.1:1 |
| Rated allowable torque range | 35.0-80.0 kgf.cm |
| Maximum momentary torque range | 70.0-160.0 kgf.cm |
| Efficiency range | 66-90% |
| Backlash at no load | <= 1.2 deg |
| Continuous permissible input speed | <= 8,000 rpm |
| Operating temperature range | -40 to 120 C |
| Housing material | Steel |
| Gear material | Steel |
| Output bearing | Ball bearings |
| Radial load, 10 mm from flange | <= 8.0 kgf |
| Shaft axial load | <= 3.5 kgf |
| Radial play of shaft | <= 0.04 mm |
| Thrust play of shaft | <= 0.3 mm |
Maximum momentary torque is not a continuous working rating.
Stage, Ratio and Performance¶
| Stages | Gearbox body length L | Available ratios | Rated allowable torque | Maximum momentary torque | Efficiency |
|---|---|---|---|---|---|
| 1 | 28.05 mm | 3.5 / 4 / 4.75 | 35.0 kgf.cm | 70.0 kgf.cm | 90% |
| 2 | 36.35 mm | 12.2 / 14 / 16 / 16.6 / 19 / 22.6 | 50.0 kgf.cm | 100.0 kgf.cm | 80% |
| 3 | 44.65 mm | 42.9 / 49 / 56 / 58.2 / 64 / 66.5 / 76 / 79 / 90.2 / 107.2 | 65.0 kgf.cm | 130.0 kgf.cm | 73% |
| 4 | 52.95 mm | 150.1 / 171.5 / 196 / 203.7 / 224 / 232.7 / 256 / 266 / 276.4 / 304 / 315.9 / 361 / 375.1 / 428.7 / 509.1 | 80.0 kgf.cm | 160.0 kgf.cm | 66% |
Supply Configuration¶
SigGear can supply the planetary gearbox only, the motor only, or a matched motor + gearbox assembly according to the application requirements.
The adapted-motor reference for this gearbox family is:
- DC motor nominal voltage: 3-36 VDC
- Adapted DC motor power: below 100 W
These are motor-matching conditions, not electrical ratings of the mechanical gearbox.
Current Public CAD¶
The current downloadable STEP represents the 4-stage reference, corresponding to a 52.95 mm gearbox-body length.
Download Simplified STEP - 4-Stage Reference
For 1-, 2- or 3-stage CAD, request the selected ratio and configuration from SigGear.
Selection Information Required¶
Please provide:
- Required output speed or reduction ratio
- Continuous and momentary output torque
- Motor voltage, power and speed
- Motor shaft diameter and length
- Motor mounting-hole pattern and locating pilot
- Output-shaft requirements
- Radial and axial loads
- Duty cycle and ambient temperature
- Backlash, noise and service-life targets
- Prototype and annual quantity
Engineering Contact¶
Wanrong Wang
International Sales / Sales Engineer, SigGear
wangwanrong@siggear.com