Multiple Disc Mechanical Brakes (MMS/MMD)

Multiple Disc Mechanical Brakes

Carlyle Johnson's Multiple Disc Mechanical Brakes provide 3 to 6 times the torque produced by single disc mechanical brakes of the same package size, making them the ideal solution for high torque, limited space requirements.

Separator springs are used between each pair of inner discs on these mechanical brakes, providing the advantage of truly floating discs. This ensures that there is negligible drag, no abrasion, and consequently no heat generated when the brake is in neutral. A locking plate on the disc end of each unit (two on double types) locks all discs against compression by the lever system.

As with all Carlyle Johnson products, our multiple disc mechanical brakes can be customized to meet your applications. Our engineering department can also custom-design and produce a mechanical brake to fit your exact requirements.

Features of Mechanical Brake Units

The MMS/MMD mechanical / friction brake features a bronze or steel friction surface for added life, superior consistency for indexing and excellent torque transmitting characteristics. Shipped fully-assembled CJM multiple disc mechanical brakes arrive ready to be slipped onto a shaft.

When needed, manual adjustment to the mechanical brake is made by temporarily loosening the lock screw on the split type adjusting ring, then turning the ring to give the desired shifting pressure. Only a hex key wrench is required for this adjustment.



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Overview - MMS/MMD Mechanical Brakes


  • Highest torque in the smallest space
  • High performance and long-life
  • Simplicity of design, greater adaptability
  • "Floating Disc Packs" - reduce drag, abrasion and heat build-up in neutral as well as provide consistent release
  • Easy on-line manual adjustment allows for fine-tuning of the device
  • Shipped assembled, ready to install


  • Torque range 10 lb. ft. - 2400 lb. ft.
  • 1 HP to 150 HP capacity
  • Positive engagement / disengagement possible at any speed
  • All units run in oil or dry applications


  • Available in single or double type
  • Custom designs and alterations available

Additional MECHANICAL BRAKE Information


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