---
title: "ATAR Robot Arc Series Cycloidal Joint specs"
description: "Cycloidal / Premium actuator from ATAR Robot (China). Peak torque 590 Nm, rated n/a, weight n/a, torque density n/a, price quote only."
canonical: https://actuatorlist.com/actuators/atar-arc-cycloidal-joint
last-updated: 2026-11-01T14:05:43.000Z
---
# Arc Series Cycloidal Joint Actuator by ATAR Robot

> Cycloidal / Premium actuator from ATAR Robot (China). Peak torque 590 Nm, rated n/a, weight n/a, torque density n/a, price quote only.

## Specifications

| Spec | Value |
| --- | --- |
| Category | Cycloidal / Premium |
| Peak torque | 590 Nm |
| Rated torque | n/a |
| Max speed | 100 rpm |
| Gear ratio | n/a |
| Weight | n/a |
| Torque density | n/a |
| Price | quote only |
| Price per Nm | n/a |
| Backdrivable | no |
| Backlash | 1 arcmin |
| Voltage | 24-72 V |
| Peak current | n/a |
| Communication | CAN-FD, EtherCAT |
| Control modes | position, velocity, torque |
| Encoder | dual encoder |
| Integrated driver | yes |
| Availability | in production |
| Data status | Unverified catalog: confirm sources |

## Size a joint

- [Motor torque calculator](/tools/motor-torque-calculator?solve=power&t=590&n=100): **6180 W** of shaft power at its peak 590 N·m and 100 rpm.
- [Humanoid robot actuators](/guides/humanoid-robot-actuators): **7 joints** with a static torque estimate and the catalog parts that reach it.

## Use cases

- humanoid joint
- heavy arm
- robot arm

## Notes

Integrated cycloidal joint family (cycloidal reducer + BLDC + driver + dual encoders), kept as a series entry. ATAR's table lists six sizes, all 24-72 V: Arc47 (ratio 25, 3/12 N.m rated/peak), Arc68 (25, 28/112.1), Arc78 (25, 40/135.8), Arc95 (21, 75/283.1), Arc102 (25, 60/263.2), Arc150 (25, 180/590). Peak here is the largest model's 590 N.m from that table; the same page's summary says 'max torque 530 N.m' and 'rated 3-150 N.m', which conflicts with the Arc150 row. No per-model weight is published (only an unattributed 'Arc series weighs only 0.2 kg'), so no single model can be verified and the entry stays an unverified family envelope. Rated speed 80-100 rpm, backlash and repeatability ~1 arcmin, CAN-FD (Arc95 and up add EtherCAT). Quote/OEM pricing.

## Sources

- [https://www.atarrobot.com/cycloidal-robot/arc-serie/Arc-cycloidal-joint-actuators.html](https://www.atarrobot.com/cycloidal-robot/arc-serie/Arc-cycloidal-joint-actuators.html)
- [https://atarrobot.com/cycloidal-robot/](https://atarrobot.com/cycloidal-robot/)

## Similar Cycloidal / Premium actuators

- [RV-42N (RV-N cycloidal reducer) (Nabtesco)](https://actuatorlist.com/actuators/nabtesco-rv-42n): 327 Nm/kg
- [DM-J10010-2EC (DAMIAO (DMBots))](https://actuatorlist.com/actuators/damiao-dm-j10010-2ec): 101 Nm/kg
- [DM-J8009-2EC (DAMIAO (DMBots))](https://actuatorlist.com/actuators/damiao-dm-j8009-2ec): 44.6 Nm/kg
- [SCA QDD-Lite-NE30-36 (INNFOS (Mintasca))](https://actuatorlist.com/actuators/innfos-sca-qdd-lite-ne30-36): 43.1 Nm/kg
- [M107 Joint Motor (Unitree Robotics)](https://actuatorlist.com/actuators/unitree-m107): n/a

## Machine-readable

- JSON: https://actuatorlist.com/api/v1/actuators/atar-arc-cycloidal-joint
- Catalog index for agents: https://actuatorlist.com/llms.txt