---
title: "Steadywin GIM8108-8 specs"
description: "QDD / Proprioceptive actuator from Steadywin (China). Peak torque 22 Nm, rated 7.5 Nm, weight 375 g, torque density 58.7 Nm/kg, price $129.20."
canonical: https://actuatorlist.com/actuators/steadywin-gim8108-8
last-updated: 2026-11-01T14:05:43.000Z
---
# GIM8108-8 by Steadywin

> QDD / Proprioceptive actuator from Steadywin (China). Peak torque 22 Nm, rated 7.5 Nm, weight 375 g, torque density 58.7 Nm/kg, price $129.20.

## Specifications

| Spec | Value |
| --- | --- |
| Category | QDD / Proprioceptive |
| Peak torque | 22 Nm |
| Rated torque | 7.5 Nm |
| Max speed | 320 rpm |
| Gear ratio | 8:1 |
| Weight | 375 g |
| Torque density | 58.7 Nm/kg |
| Price | $129.20 |
| Price per Nm | $5.9 |
| Backdrivable | yes |
| Backlash | 15 arcmin |
| Voltage | 24-56 V |
| Peak current | n/a |
| Communication | CAN |
| Control modes | position, velocity, torque |
| Encoder | 16-bit |
| Integrated driver | yes |
| Availability | in production |
| Data status | Catalog headline specs spot-checked: confirm revision |

## Size a joint

- [Motor torque calculator](/tools/motor-torque-calculator?solve=power&t=7.5&n=320): **251 W** of shaft power at its rated 7.5 N·m and 320 rpm.
- [Robot arm torque calculator](/tools/robot-arm-torque-calculator?L=0.4,0.35,0.12&m=1.2,0.8,0.3&a=0.375,0.5,0&p=2): **31.5 N·m** at the shoulder with its 375 g at the elbow of a 2 kg-payload arm.

## Use cases

- quadruped leg
- robot arm
- exoskeleton

## Notes

MIT-Cheetah-style QDD clone with very high torque density. 22 Nm stall / 7.5 Nm rated, 8:1 steel planetary (~15 arcmin backlash), nominal 110 rpm / max 320 rpm after reduction, 336W, 48V nominal (24-56V). SDC-series driver with CAN and USB-C config. Weight 375 g (net; ~0.8 kg gross shipping). Price $129.20 is Steadywin's own store price for the standard version with the GDS68 driver (bare motor $93.89), checked Oct 2026.

## Sources

- [https://openelab.io/products/steadywin-gim8108-8-robot-motor](https://openelab.io/products/steadywin-gim8108-8-robot-motor)
- [https://manuals.plus/ae/1005007128509920](https://manuals.plus/ae/1005007128509920)
- [https://rcdrone.top/products/steadywin-gim8108-8-planetary-reducer-servo-motor](https://rcdrone.top/products/steadywin-gim8108-8-planetary-reducer-servo-motor)
- [https://www.alibaba.com/product-detail/Steadywin-GIM8108-8-Gear-Motor-8\_1601153179912.html](https://www.alibaba.com/product-detail/Steadywin-GIM8108-8-Gear-Motor-8_1601153179912.html)
- [https://steadywin-motor.com/products/planetary-reduction-motor-robot-dog-humanoid-robot-joint-module-flat-thin-large-torque](https://steadywin-motor.com/products/planetary-reduction-motor-robot-dog-humanoid-robot-joint-module-flat-thin-large-torque)

## Similar QDD / Proprioceptive actuators

- [AK10-9 (V3.0 KV60) (CubeMars (T-Motor))](https://actuatorlist.com/actuators/cubemars-ak10-9): 55.2 Nm/kg
- [AK70-10 (KV100) (CubeMars (T-Motor))](https://actuatorlist.com/actuators/cubemars-ak70-10): 47.6 Nm/kg
- [AK80-9 (V3.0 KV100) (CubeMars (T-Motor))](https://actuatorlist.com/actuators/cubemars-ak80-9): 45.4 Nm/kg
- [GO-M8010-6 (Unitree)](https://actuatorlist.com/actuators/unitree-go-m8010-6): 44.7 Nm/kg
- [CyberGear Micromotor (Xiaomi)](https://actuatorlist.com/actuators/xiaomi-cybergear): 37.9 Nm/kg

## Catalog comparisons

Catalog specifications and source caveats, not compatibility recommendations.

- [AK10-9 (V3.0 KV60) vs GIM8108-8](/comparisons/cubemars-ak10-9-vs-steadywin-gim8108-8)
- [AK70-10 (KV100) vs GIM8108-8](/comparisons/cubemars-ak70-10-vs-steadywin-gim8108-8)
- [AK80-9 (V3.0 KV100) vs GIM8108-8](/comparisons/cubemars-ak80-9-vs-steadywin-gim8108-8)
- [GIM6010-8 vs GIM8108-8](/comparisons/steadywin-gim6010-8-vs-steadywin-gim8108-8)

[Browse actuator comparisons](/compare).

## Machine-readable

- JSON: https://actuatorlist.com/api/v1/actuators/steadywin-gim8108-8
- Catalog index for agents: https://actuatorlist.com/llms.txt