---
title: "MinebeaMitsumi BLDC50 frameless brushless motor specs"
description: "Frameless + Driver actuator from MinebeaMitsumi (Japan). Peak torque n/a, rated 0.4 Nm, weight n/a, torque density n/a, price quote only."
canonical: https://actuatorlist.com/actuators/minebeamitsumi-bldc50-frameless
last-updated: 2026-11-11T13:40:47.000Z
---
# BLDC50 frameless brushless motor by MinebeaMitsumi

> Frameless + Driver actuator from MinebeaMitsumi (Japan). Peak torque n/a, rated 0.4 Nm, weight n/a, torque density n/a, price quote only.

## Specifications

| Spec | Value |
| --- | --- |
| Category | Frameless + Driver |
| Peak torque | n/a |
| Rated torque | 0.4 Nm |
| Max speed | n/a |
| Gear ratio | 1:1 |
| Weight | n/a |
| Torque density | n/a |
| Price | quote only |
| Price per Nm | n/a |
| Backdrivable | yes |
| Backlash | n/a |
| Voltage | 48 V |
| Peak current | n/a |
| Communication | n/a |
| Control modes | n/a |
| Encoder | None (stator and rotor kit; add your own sensor) |
| Integrated driver | no |
| Availability | in production |
| Data status | Unverified catalog: confirm sources |

## Size a joint

- [Motor torque calculator](/tools/motor-torque-calculator?solve=power&t=0.391): **0.391 N·m** rated; add a speed for its shaft power.
- [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
- robot arm

## Notes

Motor. Frameless brushless stator and rotor kit from MinebeaMitsumi, which pitches its frameless motors at humanoid joints. The parts table gives 50 mm outer diameter, 27.68 mm length, 391 mN.m rated torque at 48 V and 86% efficiency. Peak torque, mass and speed sit in a per-model PDF that was not read, so they are left null. Needs an external drive and position sensor. Figures come from a search result of the product page, which was not opened, so the row is unverified.

## Sources

- [https://product.minebeamitsumi.com/en/product/category/rotary/brushless/frameless/index.html](https://product.minebeamitsumi.com/en/product/category/rotary/brushless/frameless/index.html)
- [https://product.minebeamitsumi.com/en/pickup/humanoidrobot/index.html](https://product.minebeamitsumi.com/en/pickup/humanoidrobot/index.html)
- [https://cdn.nmbtc.com/uploads/2025/06/mm-humanoid-robotics-sell-sheet.pdf](https://cdn.nmbtc.com/uploads/2025/06/mm-humanoid-robotics-sell-sheet.pdf)

## 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
- [RI80 V2.0 KV75 (CubeMars (T-Motor))](https://actuatorlist.com/actuators/cubemars-ri80-v2-kv75): 10 Nm/kg
- [R60 KV115 (CubeMars (T-Motor))](https://actuatorlist.com/actuators/cubemars-r60-kv115): 9.3 Nm/kg

## Machine-readable

- JSON: https://actuatorlist.com/api/v1/actuators/minebeamitsumi-bldc50-frameless
- Catalog index for agents: https://actuatorlist.com/llms.txt