Mosrac direct drive torque motors

UE6815 48V Frameless Outrunner MotorOuter diameter ( OD ) : 68mm

198.9W | 0.76-1.90 Nm | 2500-3570 rpm | 48 V


A 68mm OD frameless torque motor can directly drive robot joints with optional rated torque. Highly customizable with various options to meet your specific needs.


▪︎ Direct drive brushless motor

▪︎ Low cogging torque

▪︎ Optional for low-speed and high-speed windings


Have questions? Contact an Mosrac expert.

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Specification

ModelUE6815
DC voltage(VDC)48
Rated Output(W)198.9
Rated torque(N.m)0.76
Instant Max Torque(N.m)1.9
Rated Current(A)5
Instant Max Current(A)15
Rated Speed(rpm)2500
Maximum speed(rpm)3570
Torque Parameter(Nm/A)0.15
Rotor inertia(kg.cm²)0.29
Back EMF coefficient(V/Krpm)13.4
Resistance(ohms@20℃)1.1
Inductance(mH)0.5
Number of pole-pairs(2P)13
Weight(kg)0.156

Drawing

OD 68mm series Frameless Outrunner Motor drawing

Case studies (Customized frameless motors developed with our clients)


Case Study 4: Custom Potting Frameless Motor for Rotary Tabl
Case Study 3: Custom Frameless Torque Motor for Precision Ph
Case Study 2: Custom Frameless Motor Powers Next-Gen 5-Axis
Case study 1: The Custom Solution Based on U9419 Frameless m

Additional Info


The Mosrac UE-6815 standard version is a high-performance, frameless outer-rotor torque motor designed for demanding applications such as robotic joints, exoskeletons, collaborative robots, medical equipment, and aerospace systems. It operates at 48V and features ultra-low cogging torque with a large hollow shaft. This design allows flexible integration, including through-hole cabling, direct shaft coupling, or seamless connection with harmonic drive systems.


Main Features:

* Delivers extremely smooth motion with minimal cogging effect

* Features a wide hollow center for easy wiring and integration

* Compact size and lightweight build support space-saving designs

* Suitable for multiple applications across robotics, automation, and precision systems


Download

  • UE6815 Frameless Outrunner Motor Outline Drawing .pdf

    OD: 68mm|Height: 15mm

  • UE6815 48V Frameless Outrunner Motor Catalog.pdf

    OD: 68mm|Height: 15mm optional

  • UE6815.STEP

    OD: 68mm|Height: 15mm

  • CE Certificate.pdf

  • RoHS Certificate.pdf

  • REACH Certificate.pdf

  • IS09001 Certificate.pdf

    • Direct drives need high-quality position signals to ensure optimal performance. Perfect measuring signals can enhance the surface quality of machined workpieces, reduce the machine frame's vibrations, minimize velocity-dependent motor noise, and prevent excessive heat generation in the motor.


    Mosrac recommends using a magnetic encoder to enhance the accuracy, speed stability, and thermal behavior of direct drive axes. Because there is no mechanical transmission between the encoder and the feed unit, the position signals are not susceptible to inaccuracies or delays.

    Custom combinations are available on request and contact us.


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