90 Series Dual Disc Pneumatic Brake

The 90 Series Dual Disc Brake, named for its nine-inch (9") diameter discs,
offers high performance in a torque range from 14 lb-inches up to 3,000 lb-inches.

As an integral part of a high-performance unwind package, the 90 series brake delivers the appropriate torque level needed for a particular application by allocating actuation of the appropriate number of cylinders, from one up to four. The term 90 ‘Series’ is derived from ‘9’ inches plus our use of the second digit in the range of values from 91 to 94 to signify the number of friction pads selected for a given brake.

Aside from their heavy-duty, ductile iron disc construction and expanded surface for rapid heat dissipation, 90-Series brakes feature DFE’s time-proven Universal Actuator technology:

  • Hassle-free changeout of worn pads, without tools, via push-button spring locks
  • Limited-travel pistons that can’t scratch the disc
  • Cylinder return springs that cannot puncture the diaphragm
  • Able to be retrofit into dual disc brakes of other manufacturers
  • DFE’s popular ‘No-squeal Warranty’


  • Disc/Hub Inertia: 7.9 Slug-in2
  • Max. Torque: 3,000 in-lbs
  • Disc/Hub Weight: 28.4 lbs.
  • Max. Ship Wt.: 45 lbs.
  • Min. Shaft Length: 7.1 in.

To see if a brake in the 90 Series is the right size for your application please note its torque range listed above and review the 90 Series Brake section of DFE’s full Brake Catalog for detailed sizing information, options and accessories.


  • Non-Standard Key (NSK). For shafts having a different sized key other than the standardized ones usually used (option).
  • Mounting Plate - Flat plate for mounting the brake and guard if used.
  • Metric Mounting Bolt - Metric mounting bolts for the actuators.
  • Guard - Safety device to prevent people or objects from touching brake when in motion or hot.
  • Guard Blocks - Allows installation of guard without mounting plate.
  • Valve Assembly - Controls air supply for actuators.

Check out Dover Flexo Electronics Silencer™ Brakepads

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