Mosrac direct drive torque motors
back view of the u8519 series frameless brushless motor

U85 Series Frameless Brushless MotorOuter diameter ( OD ) : 85mm

380-846 W | 1.21-2.69 Nm | 3000-6000 rpm | 48 V


Our inrunner brushless frameless torque motors are the right motors for your systems. They offer:


  • High Efficiency

  • Compact and Robust Design

  • High Torque Output 

  • Low Maintenance

  • Precise Movement and Control

  • Long Durability

  • Low Cogging Torque


Have questions? Contact a Mosrac expert.


Request Quote
Download Catalog

Specification

Main ParametersU8519U8523U8537
Voltage(VDC)484848
Rated Output(W)380.42518.76704.78
Rated torque(Nm)1.211.652.69
Instant Max Torque(Nm)3.174.456
Rated Current(Arms)101417
Instant Max Current(Arms)303650
Rated Speed(rpm)300030002500
MaxSpeed(rpm)600060004000
Torque Parameter(Nm/Arms)0.120.120.16
Rotor inertia 10-4kg.m²0.5930.7661.27
Back EMF coefficient(Vrims/rad/s)7710
Resistance(Ω)0.160.120.09
Inductance(mH)0.20.1440.1
Pole-pairs number(2P)101010
Weight(kg)0.3060.4140.736
Motor height(mm)L110.51528
L21115.528.5
L319.623.937.7

Drawing

OD 85mm series Frameless Direct Drive Torque Motors drawing OD 85mm series Frameless Direct Drive Torque Motors drawing OD 85mm series Frameless Direct Drive Torque Motors 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


Features & Benefits:


• High torque from 1.21 Nm to 2.69 Nm

• High speeds up to 6,000 RPM

• Superior performance – high stiffness and better response

• High reliability – no mechanical transmission devices like couplings, flanges

• Compact design – minimizes product size

• Low cogging - unique magnetic circuit design decreases cogging



Applications:


• Automotive

• Machine tool

• Material handling

• Packaging

• Robotics

• Semiconductor


When to Use:


• Substantial cost savings

• Decreased mechanical complexity

• Enhanced flexibility in design

• Exceptional performance in a compact space

• Improved dynamic response

• Minimum motor size in each application

• Low cogging for smooth operation

• Low inertia allows for quicker acceleration



Download

  • U8519 Torque Motor Catalog.pdf

    OD: 85mm|Height: 19.3mm

  • U8523 Torque Motor Catalog.pdf

    OD: 85mm|Height: 23.8mm

  • U8537 Torque Motor Catalog.pdf

    OD: 85mm|Height: 37.4mm

  • U85 Series Frameless Brushless Motor Catalog.pdf

    OD: 85mm|Height: 19.3~23.8~37.4mm optional

  • U8519.STEP

    OD: 85mm|Height: 19.3mm

  • U8523.STEP

    OD: 85mm|Height: 23.8mm

  • U8537.STEP

    OD: 85mm|Height: 37.4mm

  • 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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