By Tolerance Labs engineering team. Specs from the makers’ published data.
13 models: 0.23–12 N·m peak torque, 0.04–0.71 kg weight, 24–48 V supply voltage. Every model is below with its key specs and US price.
RI motors are inrunners with a large hollow center; RO motors are outrunners with more torque for their diameter. Both come as a stator and rotor to build into your own joint.
| Model | Torque (peak / max) | Output speed | Supply voltage | Weight | Price |
|---|---|---|---|---|---|
| RI30 KV260 | 0.23 N·m | 4,110 rpm | 24 V | 0.04 kg | $52.90 |
| RO40 KV140 Lite | 0.6 N·m | 2,450 rpm | 24 V | 0.06 kg | $52.90 |
| RI60 KV120 | 1.63 N·m | 1,440 rpm | 24 V | 0.156 kg | $99.90 |
| RI50 KV100 | 1.67 N·m | 1,090 rpm | 24 V | 0.181 kg | $62.90 |
| RO60 KV115 | 2.4 N·m | 4,200 rpm | 48 V | 0.248 kg | $86.90 |
| RO60 KV115 Lite | 2.4 N·m | 4,200 rpm | 48 V | 0.248 kg | $78.90 |
| RI70 KV95 | 2.68 N·m | 1,270 rpm | 24 V | 0.27 kg | $125.90 |
| RO80 KV105 | 4 N·m | 3,600 rpm | 48 V | 0.352 kg | $116.90 |
| RO80 KV105 Lite | 4 N·m | 3,600 rpm | 48 V | 0.352 kg | $106.90 |
| RI80 V2.0 KV75 | 4.1 N·m | 1,135 rpm | 24 V | 0.411 kg | $134.90 |
| RI100 KV105 | 4.95 N·m | 1,370 rpm | 24 V | 0.5 kg | $150.90 |
| RO100 KV55 | 12 N·m | 2,000 rpm | 48 V | 0.71 kg | $174.90 |
| RO100 KV55 Lite | 12 N·m | 2,000 rpm | 48 V | 0.71 kg | $159.90 |
Picks within the series
- Most torque: RO100 KV55 (12 N·m peak)
- Most torque per kilogram: RO100 KV55 (16.9 N·m/kg)
- Lightest: RI30 KV260 (0.04 kg)
More
See everything from CubeMars, 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.