The GL40 KV70 without encoder has a higher torque constant (0.150 N·m/A against 0.11 N·m/A), draws less current at its rating (1.62 A against 1.88 A), and is lighter (107 g against 112 g) and shallower (21.5 mm against 33.5 mm). The GL40Ⅱ KV82.5 has more peak torque (0.68 N·m against 0.5 N·m), is narrower (46.1 mm against 46.5 mm), and turns faster at the output (697 RPM against 430 RPM). They match on continuous torque.
The GL40 KV70 without encoder is US$82 and the GL40Ⅱ KV82.5 is US$150. That is US$328.00 per rated N·m for the GL40 KV70 without encoder and US$600.00 per rated N·m for the GL40Ⅱ KV82.5.
| GL40 KV70 without encoder | GL40Ⅱ KV82.5 | |
|---|---|---|
| Rated Torque (N·m) | 0.25 | 0.25 |
| OD (mm) | 46.5 | 46.1 |
| Weight (g) | 107 | 112 |
| Peak Torque (N·m) | 0.5 | 0.68 |
| Rated Voltage (V) | 16 | 16 |
| Rated Speed (RPM) | 430 | 697 |
| No-Load Speed (RPM) | 1015 | 1388 |
| Rated Current (A) | 1.62 | 1.88 |
| Peak Current (A) | 3.3 | 5.22 |
| Maximum Torque Weight Ratio (N·m/kg) | 4.67 | 60.71 |
| Height (mm) | 21.5 | 33.5 |
| Kv (RPM/V) | 70 | 82.5 |
| Kt (N·m/A) | 0.150 | 0.11 |
| Ke (V/kRPM) | 15.00 | 0.0115 |
| Phase to Phase Resistance (mΩ) | 4500 | 3000 |
| Phase to Phase Inductance (μH) | 1800 | 1320 |
| Inertia (g·cm²) | 74 | 0.794578 |
| Mechanical Time Constant (ms) | 1.48 | 2.045 |
| Electrical Time Constant (ms) | 0.40 | 0.44 |
| Pole Pairs | 14 | 14 |
| Winding Type | Star | Star |
| Operation Ambient Temperature | -20℃~50℃ | -20℃~50℃ |
| Driving Way | FOC | FOC |
| Application | Gimbal, Radar | Gimbal, Radar |
Rows the two disagree on are marked; the figures are CubeMars'. To put any other two parts side by side, build your own comparison.