The RO80 KV105 Lite has more continuous torque (1.3 N·m against 1.2 N·m) and more peak torque (4.5 N·m against 3.8 N·m), is lighter (265 g against 348 g) and shallower (17.7 mm against 31.8 mm), and turns faster at the output (4000 RPM against 2365 RPM). The RI75-PH KV70 draws less current at its rating (7.28 A against 15 A), and is narrower (70 mm against 88.6 mm).
The RO80 KV105 Lite is US$117 and the RI75-PH KV70 is US$156. That is US$90.00 per rated N·m for the RO80 KV105 Lite and US$130.00 per rated N·m for the RI75-PH KV70.
| RO80 KV105 Lite | RI75-PH KV70 | |
|---|---|---|
| Rated Torque (N·m) | 1.3 | 1.2 |
| OD (mm) | 88.6 | 70 |
| Weight (g) | 265 | 348 |
| Peak Torque (N·m) | 4.5 | 3.8 |
| Rated Voltage (V) | 48 | 48 |
| Rated Speed (RPM) | 4000 | 2365 |
| No-Load Speed (RPM) | 4800 | 3360 |
| Rated Current (A) | 15 | 7.28 |
| Peak Current (A) | 55 | 24.2 (Ref) |
| Maximum Torque Weight Ratio (N·m/kg) | 15.1 | — |
| Height (mm) | 17.7 | 31.8 |
| Kv (RPM/V) | 105 | — |
| Kt (N·m/A) | 0.087 | — |
| Ke (V/kRPM) | 9.07 | — |
| Phase to Phase Resistance (mΩ) | 120 | 495 |
| Phase to Phase Inductance (μH) | 103 | 673 |
| Inertia (g·cm²) | 1600 | 416 |
| Mechanical Time Constant (ms) | 2.95 | — |
| Electrical Time Constant (ms) | 0.86 | 0.0013 |
| Pole Pairs | 21 | 14 |
| Winding Type | Delta | — |
| Operation Ambient Temperature | -20℃~50℃ | — |
| Hall Sensor | No | — |
| Temperature Sensor | No | — |
| Driving Way | FOC | — |
| Application | Cobot Arm, Exoskeleton | — |
Rows the two disagree on are marked; the figures are CubeMars'. To put any other two parts side by side, build your own comparison.