---
title: "AK80-9 (V3.0 KV100) by CubeMars (T-Motor): specs, torque and price"
description: "QDD / Proprioceptive actuator from CubeMars (T-Motor) (China). Peak torque 22 Nm, rated 9 Nm, weight 485 g, torque density 45.4 Nm/kg, price $580."
canonical: https://getactuators.com/actuators/cubemars-ak80-9
last-updated: 2026-09-26T20:29:50.000Z
---
# AK80-9 (V3.0 KV100) by CubeMars (T-Motor)

> QDD / Proprioceptive actuator from CubeMars (T-Motor) (China). Peak torque 22 Nm, rated 9 Nm, weight 485 g, torque density 45.4 Nm/kg, price $580.

## Specifications

| Spec | Value |
| --- | --- |
| Category | QDD / Proprioceptive |
| Peak torque | 22 Nm |
| Rated torque | 9 Nm |
| Max speed | 570 rpm |
| Gear ratio | 9:1 |
| Weight | 485 g |
| Torque density | 45.4 Nm/kg |
| Price | $580 |
| Price per Nm | $26.4 |
| Backdrivable | yes |
| Backlash | n/a |
| Voltage | 24-48 V |
| Peak current | 28 A |
| Communication | CAN |
| Control modes | position, velocity, torque, mit |
| Encoder | 14-bit magnetic (motor-side) |
| Integrated driver | yes |
| Availability | in production |
| Data status | verified against sources |

## Use cases

- quadruped leg
- robot arm
- exoskeleton

## Notes

The canonical MIT-Cheetah-style QDD module. V3.0 KV100 rates 22 Nm peak / 9 Nm continuous (earlier V1/V2 were 18 Nm peak). No-load 570 rpm, rated 390 rpm at 48V. Supports CubeMars 'servo' and 'MIT' hybrid modes; needs an external CAN adapter. Price ~$580 street (RobotShop sale $579.90, list $599.90).

## Sources

- <https://www.cubemars.com/product/ak80-9-v3-0-robotic-actuator.html>
- <https://www.cubemars.com/images/file/20240523/1716429938564781.pdf>
- <https://www.cubemars.com/goods.php?id=982>
- <https://www.robotshop.com/products/cubemars-ak80-9-v30-kv100-ak-series-robotic-actuator>

## Similar QDD / Proprioceptive actuators

- [GIM8108-8 (Steadywin)](https://getactuators.com/actuators/steadywin-gim8108-8): 58.7 Nm/kg
- [AK10-9 (V3.0 KV60) (CubeMars (T-Motor))](https://getactuators.com/actuators/cubemars-ak10-9): 55.2 Nm/kg
- [AK70-10 (KV100) (CubeMars (T-Motor))](https://getactuators.com/actuators/cubemars-ak70-10): 47.6 Nm/kg
- [GO-M8010-6 (Unitree)](https://getactuators.com/actuators/unitree-go-m8010-6): 44.7 Nm/kg
- [CyberGear Micromotor (Xiaomi)](https://getactuators.com/actuators/xiaomi-cybergear): 37.9 Nm/kg

## Machine-readable

- JSON: https://getactuators.com/api/v1/actuators/cubemars-ak80-9
- Catalog index for agents: https://getactuators.com/llms.txt