The RI85-PH KV85 has more continuous torque (2 N·m against 1.76 N·m) and more peak torque (5 N·m against 4.95 N·m), is lighter (411 g against 500 g) and narrower (85 mm against 104 mm), and turns faster at the output (3042 RPM against 1370/2100/2825 RPM). The RI100 KV105 without hall sensor draws less current at its rating (13.6 A against 16 A), and is shallower (26 mm against 27.3 mm).
The RI85-PH KV85 is US$166 and the RI100 KV105 without hall sensor is US$167. That is US$83.00 per rated N·m for the RI85-PH KV85 and US$94.89 per rated N·m for the RI100 KV105 without hall sensor.
| RI85-PH KV85 | RI100 KV105 without hall sensor | |
|---|---|---|
| Rated Torque (N·m) | 2 | 1.76 |
| Rated Voltage (V) | 48 | 24/36/48 |
| Rated Speed (RPM) | 3042 | 1370/2100/2825 |
| No-Load Speed (RPM) | 4080 | 2184/3276/4368 |
| Rated Current (A) | 16 | 13.6 |
| Phase to Phase Resistance (mΩ) | 138.5 | 126 |
| Phase to Phase Inductance (μH) | 239.4 | 366.7 |
| OD (mm) | 85 | 104 |
| Weight (g) | 411 | 500 |
| Peak Torque (N·m) | 5 | 4.95 |
| Peak Current (A) | 44 (Ref) | 38.6 |
| Height (mm) | 27.3 | 26 |
| Inertia (g·cm²) | 652 | 215.5 |
| Electrical Time Constant (ms) | 0.0017 | 2.91 |
| Pole Pairs | 14 | 14 |
| Motor Constant Km (N·m/√W) | — | 0.3634 |
| Maximum Torque Weight Ratio (N·m/kg) | — | 9.9 |
| Kv (RPM/V) | — | 105 |
| Kt (N·m/A) | — | 0.129 |
| Ke (V/kRPM) | — | 10.47 |
| Mechanical Time Constant (ms) | — | 0.16 |
| Winding Type | — | Delta Phase 3 |
| Operation Ambient Temperature | — | -20℃~50℃ |
| 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.