12P 12 mm Planetary Gearbox - Technical Datasheet v1.0¶
Status: Public engineering evaluation reference
Release date: 2026-10-06
The SigGear 12P is a 12 mm planetary gearbox platform with one- to four-stage configurations. Performance values below are consolidated from the current canonical product page. Mechanical-interface details are linked to the controlled 2D drawing reference released for this model.
Key Specifications¶
| Parameter | Public value |
|---|---|
| Nominal outer diameter | 12 mm |
| Number of stages | 1-4 |
| Gearbox length range | 11.35–19.60 mm |
| Reduction ratio range | 3.5:1–509.1:1 |
| Rated allowable torque range | 2.0–4.2 kgf·cm |
| Maximum momentary torque range | 4.0–8.4 kgf·cm |
| Efficiency range | 66–90% |
| Backlash at no load | ≤ 1.5° |
| Continuous permissible input speed | ≤ 8,000 rpm |
| Operating temperature range | −40 to 120 °C |
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 | 11.35 mm | 3.5 / 4 / 4.75 | 2.0 kgf·cm | 4.0 kgf·cm | 90% |
| 2 | 14.10 mm | 12.25 / 14 / 16 / 16.6 / 19 / 22.6 | 3.0 kgf·cm | 6.0 kgf·cm | 80% |
| 3 | 16.85 mm | 42.9 / 49 / 56 / 58.2 / 64 / 66.5 / 76 / 79 / 90.25 / 107.2 | 3.6 kgf·cm | 7.2 kgf·cm | 73% |
| 4 | 19.60 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 | 4.2 kgf·cm | 8.4 kgf·cm | 66% |
Published Load / Shaft Limits¶
| Parameter | Public value |
|---|---|
| Radial load, 10 mm from flange | ≤ 0.8 kgf |
| Shaft axial load | ≤ 0.25 kgf |
| Thrust shaft play | ≤ 0.04 mm |
Only values currently published for 12P are shown. Do not transfer limits from another frame size.
Motor Matching Reference¶
- Adapted DC motor nominal voltage: 3–36 VDC
- Adapted DC motor power: below 4 W
These are motor-matching conditions, not electrical ratings of the mechanical gearbox.
Mechanical Interface and CAD¶
View 12P Mechanical Interface v1.0
Download 12P Simplified STEP - 4-Stage Reference
A simplified public 4-stage STEP reference is released for early packaging and mechanical Design-In. The detailed full-assembly STEP remains configuration-controlled and request-only because it contains internal planetary transmission geometry.
For final CAD, provide the selected ratio, stage count and motor interface.
Request CAD / Controlled Drawing
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
Related Product¶
Engineering Contact¶
Wanrong Wang
International Sales / Sales Engineer, SigGear
wangwanrong@siggear.com