---
title: "RobStride 04 by RobStride: specs, torque and price"
description: "Integrated Joint actuator from RobStride (China). Peak torque 120 Nm, rated 40 Nm, weight 1420 g, torque density 84.5 Nm/kg, price $255."
canonical: https://getactuators.com/actuators/robstride-04
last-updated: 2026-09-26T20:29:50.000Z
---
# RobStride 04 by RobStride

> Integrated Joint actuator from RobStride (China). Peak torque 120 Nm, rated 40 Nm, weight 1420 g, torque density 84.5 Nm/kg, price $255.

## Specifications

| Spec | Value |
| --- | --- |
| Category | Integrated Joint |
| Peak torque | 120 Nm |
| Rated torque | 40 Nm |
| Max speed | n/a |
| Gear ratio | 9:1 |
| Weight | 1420 g |
| Torque density | 84.5 Nm/kg |
| Price | $255 |
| Price per Nm | $2.1 |
| Backdrivable | yes |
| Backlash | n/a |
| Voltage | 15-60 V |
| Peak current | n/a |
| Communication | CAN |
| Control modes | position, velocity, torque, mit |
| Encoder | dual magnetic |
| Integrated driver | yes |
| Availability | in production |
| Data status | verified against sources |

## Use cases

- robot arm
- humanoid joint
- quadruped leg

## Notes

Largest mainstream RobStride QDD module. 120 N.m peak, 40 N.m rated, 9:1 reduction, size 110x50 mm, 15-60 V driver working voltage, CAN, dual magnetic encoders. Installed mass 1420 g (1.4 kg) per RobStride/Seeed/OpenELAB. Priced at $255 on Seeed Studio (authorized RobStride distributor, USD).

## Sources

- <https://www.seeedstudio.com/Robostride-04-Actuator-p-6775.html>
- <https://openelab.io/blogs/learn/robstride04-qdd-120n-m-integrated-joint-bldc-gear-motor-complete-guide>
- <https://x.com/RobStride_com/status/1802891697912737824>
- <https://github.com/RobStride/Product_Information>
- <https://www.robstride.com/products/robStride04>

## Similar Integrated Joint actuators

- [RMD-X8-120 (MyActuator)](https://getactuators.com/actuators/myactuator-rmd-x8-120): 85.7 Nm/kg
- [GIM6010-36 (48V) (Steadywin)](https://getactuators.com/actuators/steadywin-gim6010-36): 71.4 Nm/kg
- [RobStride 03 (RobStride)](https://getactuators.com/actuators/robstride-03): 66.7 Nm/kg
- [RobStride 00 (RobStride)](https://getactuators.com/actuators/robstride-00): 45.2 Nm/kg
- [RobStride 01 (RobStride)](https://getactuators.com/actuators/robstride-01): 44.7 Nm/kg

## Machine-readable

- JSON: https://getactuators.com/api/v1/actuators/robstride-04
- Catalog index for agents: https://getactuators.com/llms.txt