By Tolerance Labs engineering team. Specs from the makers’ published data.
17 models: 0.01–8.5 N·m peak torque, 0.01–0.58 kg weight, 12–36 V supply voltage. Every model is below with its key specs and US price.
WK motors are frameless outrunners, a stator and rotor only, for building into joints and gimbals.
| Model | Torque (peak / max) | Output speed | Supply voltage | Weight | Price |
|---|---|---|---|---|---|
| WK1105 | 0.01 N·m | 850 rpm | 12 V | 0.006 kg | $41.90 |
| WK1806 | 0.06 N·m | 800 rpm | 12 V | 0.012 kg | $41.90 |
| WK2806 | 0.09 N·m | 950 rpm | 12 V | 0.026 kg | $41.90 |
| WK2205 | 0.12 N·m | 792 rpm | 12 V | 0.014 kg | $41.90 |
| WK3506 | 0.15 N·m | 467 rpm | 12 V | 0.032 kg | $42.90 |
| WK3510 | 0.16 N·m | 363 rpm | 12 V | 0.047 kg | $44.90 |
| WK4315 | 0.42 N·m | 238 rpm | 24 V | 0.11 kg | $52.90 |
| WK4310 | 0.49 N·m | 504 rpm | 24 V | 0.078 kg | $50.90 |
| WK5215 | 0.53 N·m | 140 rpm | 24 V | 0.167 kg | $56.90 |
| WK5225 | 0.77 N·m | 110 rpm | 24 V | 0.281 kg | $67.90 |
| WK5515 | 1.26 N·m | 264 rpm | 24 V | 0.196 kg | $56.90 |
| WK6010 | 1.59 N·m | 294 rpm | 36 V | 0.156 kg | $56.90 |
| WK8110 | 2.4 N·m | 349 rpm | 24 V | 0.206 kg | $67.90 |
| WK6025 | 2.68 N·m | 504 rpm | 36 V | 0.345 kg | $73.90 |
| WK8115-4 | 4.11 N·m | 372 rpm | 36 V | 0.313 kg | $83.90 |
| WK8115-1 | 5.17 N·m | 954 rpm | 24 V | 0.313 kg | $83.90 |
| WK10025 | 8.5 N·m | 168 rpm | 36 V | 0.576 kg | $140.90 |
Picks within the series
- Most torque: WK10025 (8.5 N·m peak)
- Most torque per kilogram: WK8115-1 (16.52 N·m/kg)
- Lightest: WK1105 (0.01 kg)
More
See everything from Steadywin, and the guides Building a custom joint with frameless torque motors and How to size a robot joint motor. Size a joint with the joint torque calculator.