Mosrac direct drive torque motors

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

380-848 W | 1.21-2.7 Nm | 3000-4500 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.


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Download Catalog

Specification

ModelU8519U8523U8537
DC Voltage(VDC)484848
Rated output(W)380518848
Rated torque(N.m)1.211.652.7
Instant max torque(N.m)3.64.958.1
Rated current(A)10.51323.5
Instant max current(A)303940.5
Rated speed(rpm)300030003000
Maximum speed(rpm)450045004500
Torque parameter(Nm/A)0.1210.1270.115
Rotor inertia(kg.cm²)0.610.8591.581
Back EMF coefficient(Vrims/KRPM)7.57.57.3
Coil resistance(ohms@20℃)0.260.170.188
Coil Inductance(mH)0.20.160.22
Number of pole-pairs(2P)111111
Weight(g)306414736
Cogging Torque (mN.m)36.3(REF.)49.5(REF.)81(REF.)
Size(mm)L1 (Stator stack height)10.51528
L2 (Rotor height)1115.528.5
L3 (Overall height)19.623.937.7

Drawing

OD 85mm series Frameless Inrunner Torque Motors drawing OD 85mm series Frameless Inrunner Torque Motors drawing OD 85mm series Frameless Inrunner 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 2.7 Nm

• High speeds up to 4,500 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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