The RO50 KV108 Lite draws less current at its rating (3.4 A against 8.5 A), and is lighter (105 g against 195 g), narrower (61.7 mm against 70.5 mm) and shallower (14.5 mm against 15 mm). The RO60 KV115 Lite has more continuous torque (0.8 N·m against 0.3 N·m), more peak torque (2.4 N·m against 0.9 N·m) and a higher torque constant (0.094 N·m/A against 0.088 N·m/A), and turns faster at the output (4200 RPM against 2100 RPM).
The RO50 KV108 Lite is US$74 and the RO60 KV115 Lite is US$87. That is US$246.67 per rated N·m for the RO50 KV108 Lite and US$108.75 per rated N·m for the RO60 KV115 Lite.
| RO50 KV108 Lite | RO60 KV115 Lite | |
|---|---|---|
| Rated Torque (N·m) | 0.3 | 0.8 |
| OD (mm) | 61.7 | 70.5 |
| Weight (g) | 105 | 195 |
| Peak Torque (N·m) | 0.9 | 2.4 |
| Rated Voltage (V) | 24 | 48 |
| Maximum Torque Weight Ratio (N·m/kg) | 8.57 | 12.3 |
| Rated Speed (RPM) | 2100 | 4200 |
| No-Load Speed (RPM) | 2600 | 5230 |
| Rated Current (A) | 3.4 | 8.5 |
| Peak Current (A) | 9.3 | 40 |
| Height (mm) | 14.5 | 15 |
| Kv (RPM/V) | 108 | 115 |
| Kt (N·m/A) | 0.088 | 0.094 |
| Ke (V/kRPM) | 9.2 | 8.28 |
| Phase to Phase Resistance (mΩ) | 1035 | 300 |
| Phase to Phase Inductance (μH) | 460 | 395 |
| Inertia (g·cm²) | 327.21 | 800 |
| Mechanical Time Constant (ms) | 2.4 | 2.86 |
| Electrical Time Constant (ms) | 0.44 | 1.32 |
| Pole Pairs | 14 | 14 |
| Operation Ambient Temperature | -20℃~50℃ | -20℃~50℃ |
| Driving Way | FOC | FOC |
| Application | Cobot Arm, Exoskeleton | Cobot Arm, Exoskeleton |
| Winding Type | — | Star |
| Hall Sensor | — | No |
| Temperature Sensor | — | No |
Rows the two disagree on are marked; the figures are CubeMars'. To put any other two parts side by side, build your own comparison.