The AK60-6 V3.0 KV80 has a higher torque constant (0.135 N·m/A against 0.11 N·m/A), is shallower (43 mm against 54 mm), and turns faster at the output (233/490 RPM against 40 RPM). The AK45-36 KV80 has more continuous torque (8 N·m against 3 N·m) and more peak torque (24 N·m against 9 N·m), draws less current at its rating (2 A against 3.8 A), and is lighter (340 g against 380 g) and narrower (55 mm against 79 mm).
The AK60-6 V3.0 KV80 is US$335 and the AK45-36 KV80 is US$168. That is US$111.67 per rated N·m for the AK60-6 V3.0 KV80 and US$21.00 per rated N·m for the AK45-36 KV80.
| AK60-6 V3.0 KV80 | AK45-36 KV80 | |
|---|---|---|
| Reduction Ratio | 6:1 | 36:1 |
| Rated Torque (N·m) | 3 | 8 |
| OD (mm) | 79 | 55 |
| Weight (g) | 380 | 340 |
| Peak Torque (N·m) | 9 | 24 |
| Motor Constant Km (N·m/√W) | 0.15 | — |
| Rated Voltage (V) | 24/48 | 24 |
| Rated Speed (RPM) | 233/490 | 40 |
| Rated Current (A) | 3.8 | 2 |
| Peak Current (A) | 0.3/11.2 | 6.5 |
| Maximum Torque Weight Ratio (N·m/kg) | 23.68 | — |
| Height (mm) | 43 | 54 |
| Back Drive (N·m) | 0.2 | 0.8 |
| Kv (RPM/V) | 80 | 80 |
| Kt (N·m/A) | 0.135 | 0.11 |
| Ke (V/kRPM) | 12.5 | 12.5 |
| Phase to Phase Resistance (mΩ) | 595 | 1.8 |
| Phase to Phase Inductance (μH) | 676 | 1.1 |
| Inertia (g·cm²) | 243.5 | — |
| Mechanical Time Constant (ms) | 0.81 | 0.83 |
| Electrical Time Constant (ms) | 0.69 | — |
| Pole Pairs | 14 | 14 |
| Winding Type | Star Backlash (°) 0.55 | Star |
| Number of Encoder | 1 | 33 |
| Inner Loop Encoder Type | Magnetic Encoder | 14bit |
| Inner Ring Encoder Resolution | 16bit | — |
| CAN Connector | XT30PW(2+2)-M | A1257WR-S-3P |
| UART Connector | A1257WR-S-3P | XT30PW-M |
| Temperature Sensor | NTC MF51B 103F3950 | NTC MF51B 103F3950 |
| Operation Ambient Temperature | -20℃~50℃ | -20℃~50℃ |
| Driving Way | FOC | FOC |
| Application | Legged Robot, Exoskeleton, AGV | Legged Robot, Exoskeleton, AGV |
| No-Load Speed (RPM) | — | 52 |
| Maximum Torque Density (N·m/kg) | — | 70.5 |
| Backlash (arcmin) | — | 12 |
| Rotor Inertia (g·cm²) | — | 32 |
| Motor Constant (N·m/√W) | — | 0.15 |
| Number of Slots | — | 24 |
| Outer Ring Encoder Resolution | — | 1 |
| Power Connector | — | Magnetic Encoder |
| Noise dB (65cm away the motor) | — | 65 |
| Basic Dynamic Load Rating Cr (N) | — | 2810 |
| Basic Static Load Rating C0r (N) | — | 2760 |
| Insulation Level | — | F |
Rows the two disagree on are marked; the figures are CubeMars'. To put any other two parts side by side, build your own comparison.