---
title: "CubeMars RI80 V2.0 KV75 specs"
description: "Frameless + Driver actuator from CubeMars (T-Motor) (China). Peak torque 4.1 Nm, rated 1.4 Nm, weight 411 g, torque density 10 Nm/kg, price $132.90."
canonical: https://actuatorlist.com/actuators/cubemars-ri80-v2-kv75
last-updated: 2026-11-01T14:05:43.000Z
---
# RI80 V2.0 KV75 by CubeMars (T-Motor)

> Frameless + Driver actuator from CubeMars (T-Motor) (China). Peak torque 4.1 Nm, rated 1.4 Nm, weight 411 g, torque density 10 Nm/kg, price $132.90.

## Specifications

| Spec | Value |
| --- | --- |
| Category | Frameless + Driver |
| Peak torque | 4.1 Nm |
| Rated torque | 1.4 Nm |
| Max speed | 2430 rpm |
| Gear ratio | 1:1 |
| Weight | 411 g |
| Torque density | 10 Nm/kg |
| Price | $132.90 |
| Price per Nm | $32.4 |
| Backdrivable | yes |
| Backlash | n/a |
| Voltage | 12-48 V |
| Peak current | n/a |
| Communication | n/a |
| Control modes | n/a |
| Encoder | Optional Hall-sensor version; bare frameless kit (add own encoder) |
| Integrated driver | no |
| 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=1.45&n=2430): **369 W** of shaft power at its rated 1.45 N·m and 2430 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=0.411,0.5,0&p=2): **31.6 N·m** at the shoulder with its 411 g at the elbow of a 2 kg-payload arm.

## Use cases

- robot arm
- cobot
- exoskeleton
- quadruped leg

## Notes

Motor. Frameless inrunner torque motor, dia 85 x 82 mm, delta winding, 8 pole pairs. Peak torque 4.1 Nm; rated torque 1.45 Nm; rated current 9.4A. max\_speed\_rpm is the rated speed at 48V. Kt not published. Needs external FOC driver. Price $132.90 is the CubeMars store price for the V2.0 KV75 without hall sensor ($147.90 with), checked Oct 2026.

## Sources

- [https://www.cubemars.com/product/ri80-v2-0-kv75-frameless-inrunner-torque-motor.html](https://www.cubemars.com/product/ri80-v2-0-kv75-frameless-inrunner-torque-motor.html)
- [https://www.robotshop.com/products/cubemars-ri80-kv75-ri-series-frameless-inrunner-torque-motor](https://www.robotshop.com/products/cubemars-ri80-kv75-ri-series-frameless-inrunner-torque-motor)
- [https://www.directindustry.com/prod/cubemars/product-217143-2272307.html](https://www.directindustry.com/prod/cubemars/product-217143-2272307.html)
- [https://store.cubemars.com/products/ri80](https://store.cubemars.com/products/ri80)

## Similar Frameless + Driver actuators

- [TQ-RoboDrive ILM85x26 (TQ-Systems (RoboDrive))](https://actuatorlist.com/actuators/tq-robodrive-ilm85x26): 14 Nm/kg
- [EC frameless 90 flat (260 W) (maxon)](https://actuatorlist.com/actuators/maxon-ec-frameless-90-flat-260w): 12 Nm/kg
- [RI60 KV120 (CubeMars (T-Motor))](https://actuatorlist.com/actuators/cubemars-ri60-kv120): 10.5 Nm/kg
- [R60 KV115 (CubeMars (T-Motor))](https://actuatorlist.com/actuators/cubemars-r60-kv115): 9.3 Nm/kg
- [iPower GM8112-80T (iPower Motor (iFlight))](https://actuatorlist.com/actuators/ipower-gm8112-80t): 2.1 Nm/kg

## Catalog comparisons

Catalog specifications and source caveats, not compatibility recommendations.

- [R60 KV115 vs RI80 V2.0 KV75](/comparisons/cubemars-r60-kv115-vs-cubemars-ri80-v2-kv75)
- [RI60 KV120 vs RI80 V2.0 KV75](/comparisons/cubemars-ri60-kv120-vs-cubemars-ri80-v2-kv75)
- [RI80 V2.0 KV75 vs EC frameless 90 flat (260 W)](/comparisons/cubemars-ri80-v2-kv75-vs-maxon-ec-frameless-90-flat-260w)
- [RI80 V2.0 KV75 vs TQ-RoboDrive ILM85x26](/comparisons/cubemars-ri80-v2-kv75-vs-tq-robodrive-ilm85x26)

[Browse actuator comparisons](/compare).

## Machine-readable

- JSON: https://actuatorlist.com/api/v1/actuators/cubemars-ri80-v2-kv75
- Catalog index for agents: https://actuatorlist.com/llms.txt