Kaiserdrive KGU-20B Harmonic Integrated Joint Module (56 N·m rated)
Vendor: Kaiserdrive
Product: KGU-20B
Jiangsu Kaiserdrive (subsidiary of Leaderdrive Harmonic Drive, STAR-688017) KGU robot joint module, model KGU-20B: 56 N·m rated / 105 N·m max torque, 37/50 rpm rated/max speed, 210 W rated power, 48VDC, ratio 1/81. Integrated harmonic reducer + frameless torque motor + built-in EtherCAT/CANopen servo driver + dual 20-bit single-turn absolute encoders (BiSS-C), 50 arcsec positioning / 10 arcsec repeatability, Φ14mm hollow shaft, Φ90×89mm envelope, only 1.67kg, optional power-off holding brake. For lightweight humanoid-arm joints (payload/weight ratio near 1:1); smallest joint under 350g.
| Bus | EtherCAT / CANopen |
| Model | KGU-20B |
| Weight | 1.67 kg |
| Encoder | 20bit （BiSS-C） |
| Reducer | （ 1/81） |
| Voltage | 48VDC（ 24VDC） |
| Dimensions | Φ90×89 mm |
| Gear Ratio | 1/81 |
| Peak Speed | 50 rpm |
| Protection | （F ） |
| Peak Torque | 105 N·m |
| Rated Power | 210 W |
| Rated Speed | 37 rpm |
| Vendor Site | https://www.kaiserdrive.com |
| Hollow Shaft | Φ14 mm |
| Rated Torque | 56 N·m |
| Repeatability | 10 arcsec |
| Positioning Accuracy | 50 arcsec |