M4-420X Brushed Motors

The M4-420X series DC brushed servo-motors, utilising high energy rare earth magnet material, provide precise motion control in machine tools, robotics, automatic material handling, wiredrawing, paper, plastic film and foil processing, tension controls, and packaging machinery, etc. Peak torque of up to 161Nm gives ample power for fast, accurate positioning. Coupled with low motor inertia, theoretical acceleration of up to 6,500 rad/sec2 results.

With a speed range capability in excess of 20,000: 1, one motor can provide rapid traverse and feed rates for each machine axis, eliminating the complexity and compliance of multiple motors, clutches, and gear trains. Speeds as low as 6 revs. per hour may be achieved in a position loop without cogging. The unique permanent-magnet structure eliminates thermal runaway and commutation problems commonly encountered in conventional ceramic-magnet motors. Provision is made for mounting resolver, encoder or other position feedback devices by means of a spigot at the non-drive end with shaft extension. A 24VDC. failsafe brake can optionally be provided. Motor power and tacho-generator leads are provided via junction boxes but an alternative connection by flying lead (PG Glands) or connectors is possible.


  • 10 to 30Nm continuous
  • 1.5 – 2.6 kW
  • 3200 rpm Max Speed
  • Compact Size
  • High-Energy Rare-Earth Magnets
  • 6-Pole Motor

Standard Features

  • Round Flange (IMB14)
  • Junction Box
  • IP44 Sealing
  • Keyway
  • Rear Shaft Extension
  • Tacho
  • Thermostat


  • Brake
  • Connectors
  • Square Flange (IMB5)
  • Special Winding
  • No Keyway
  • Special Shafts
  • Oil Seal
  • Special Sealing

M4-420X Electrical Specification

M4-420X Part Numbering

M4-420X drawings