---
title: "maxon EC frameless 90 flat (260 W) specs"
description: "Frameless + Driver actuator from maxon (Switzerland). Peak torque 9.8 Nm, rated 1 Nm, weight 814 g, torque density 12 Nm/kg, price $437."
canonical: https://actuatorlist.com/actuators/maxon-ec-frameless-90-flat-260w
last-updated: 2026-11-01T14:05:43.000Z
---
# EC frameless 90 flat (260 W) by maxon

> Frameless + Driver actuator from maxon (Switzerland). Peak torque 9.8 Nm, rated 1 Nm, weight 814 g, torque density 12 Nm/kg, price $437.

## Specifications

| Spec | Value |
| --- | --- |
| Category | Frameless + Driver |
| Peak torque | 9.8 Nm |
| Rated torque | 1 Nm |
| Max speed | 5000 rpm |
| Gear ratio | 1:1 |
| Weight | 814 g |
| Torque density | 12 Nm/kg |
| Price | $437 |
| Price per Nm | $44.8 |
| Backdrivable | yes |
| Backlash | n/a |
| Voltage | 48 V |
| Peak current | n/a |
| Communication | n/a |
| Control modes | n/a |
| Encoder | None (frameless rotor/stator kit; add own sensor) |
| Integrated driver | no |
| Availability | eol |
| Data status | Catalog headline specs spot-checked: confirm revision |

## Size a joint

- [Motor torque calculator](/tools/motor-torque-calculator?solve=power&t=1&n=5000): **524 W** of shaft power at its rated 1 N·m and 5000 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=0.814,0.5,0&p=2): **33.2 N·m** at the shoulder with its 814 g at the elbow of a 2 kg-payload arm.

## Use cases

- robot arm
- direct drive joint
- cobot

## Notes

Motor. Part 542099, dia 90 mm flat frameless BLDC kit (rotor + stator supplied separately, no bearings/shaft). The maxon product page lists nominal (max continuous) torque 989 mNm (~1 N.m), stall torque 9.76 N.m, weight 814 g, and max speed 5000 rpm; torque constant 136 mNm/A, 11 pole pairs. Suited to gearless direct drive. maxon lists this part as NRND (not recommended for new designs). Price is approximate: the maxon shop lists EUR 379.78 for 1-4 pcs excluding VAT and shipping (checked Oct 2026), converted at about 1.15 USD/EUR.

## Sources

- [https://www.maxongroup.com/maxon/view/product/542099](https://www.maxongroup.com/maxon/view/product/542099)
- [https://datasheets.globalspec.com/ds/maxon-motor-ag/542099/abc9aff5-cce5-4b70-a592-8dbb20e40d6b](https://datasheets.globalspec.com/ds/maxon-motor-ag/542099/abc9aff5-cce5-4b70-a592-8dbb20e40d6b)
- [https://www.expo21xx.com/news/maxon-brushless-ec-90-flat-motor-with-160-w-or-260-w-of-power/](https://www.expo21xx.com/news/maxon-brushless-ec-90-flat-motor-with-160-w-or-260-w-of-power/)

## Similar Frameless + Driver actuators

- [TQ-RoboDrive ILM85x26 (TQ-Systems (RoboDrive))](https://actuatorlist.com/actuators/tq-robodrive-ilm85x26): 14 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
- [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.

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

[Browse actuator comparisons](/compare).

## Machine-readable

- JSON: https://actuatorlist.com/api/v1/actuators/maxon-ec-frameless-90-flat-260w
- Catalog index for agents: https://actuatorlist.com/llms.txt