Kaiserdrive KGU-20B Harmonic Integrated Joint Module (56 N·m rated)
Vendor: 开璇智能 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（默认）/ CANopen（可选） |
| brake | 可选掉电保持制动器 |
| model | KGU-20B |
| weight | 1.67 kg |
| encoder | 双 20bit 单圈绝对值编码器（BiSS-C） |
| reducer | 谐波减速（速比 1/81） |
| voltage | 48VDC（可选 24VDC） |
| backlash | 零背隙（谐波传动） |
| dimensions | Φ90×89 mm |
| gear_ratio | 1/81 |
| peak_speed | 50 rpm |
| protection | 全闭自冷（F 级绝缘） |
| 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 |