ZeroErr eRob80I Harmonic Rotary Actuator (100:1)
Ø80 mm hollow-bore (Ø18 mm) strain-wave joint with built-in servo drive, dual absolute encoders and motor-side friction brake, for cobot and humanoid arm joints that need zero backlash.
Specifications
| Peak torque | 143 N·m momentary peak limit; 70 N·m repeated peak limit |
|---|---|
| Rated torque | 31 N·m (rated torque L10) |
| Gear ratio | 100:1 strain-wave (zero-backlash gearing); 50/80/120 also offered |
| Voltage | 48 VDC nominal |
| Mass | 1.03 kg (series weight as listed) |
| Interface | EtherCAT or CANopen (also Modbus, RS485, I/O, analog in, STO listed) |
| Encoder | Dual absolute (motor + output), output 19-bit |
| Size | Ø80 mm x 64.2 mm, Ø18 mm hollow bore |
Who makes it
Need a different shaft, connector, firmware or enclosure, or a price at 1,000 units? Maglev takes the catalog part to the factory and comes back with a custom version and one fixed price.
Landed cost in the US
Total US duty on this part by where it is made (2026-10-29). Mexico shown before USMCA preference; qualifying goods enter duty free. Your factory choice, not the shipping port, sets the origin.
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Compliance
| HTS classification | 8501.31.40.00 typical, not a ruling |
|---|---|
| NDAA | unknown |
| Blue UAS | unknown |
| FCC | n/a |
| Notes | Torque table from the maker's preview spec page (the main product page loads it in an iframe). |
Equivalents from other makers
Sources
- https://www.zeroerr.com/preview/erob80i_en.htmlfull spec + torque table (iframe content of the product page), photos
- https://en.zeroerr.cn/rotary_actuators/erob80imaker product page
- https://aifitlab.com/products/zeroerr-erob-80-i-motorUSD price by variant
- https://rcdrone.top/products/zeroerr-erob-80-i-motorUSD price by variant
Record confidence: VERIFIED. VERIFIED means the maker's own documents; REPORTED means a credible third party; UNVERIFIED means a single weak source. Anything we could not confirm says unknown.