Air Engaged Brakes

Air Engaged Brakes

Flange Mounted Friction Brakes For Stopping and Holding

Function: Stopping, Holding (Cycling Applications)
Drive Arrangement: Machine Frame or Bracket to Shaft


  • Air pressure compresses drive and friction discs to produce torque.
  • Torque is linear in response to the air pressure applied.
  • Release springs provide positive disengagement when air is exhausted.


  • The brake flange bolts to a machine frame or other fixture, the shaft inserts into the bore and is fixed with a customer supplied key.
  • Can also be mounted mid-shaft with the flange connected to a bracket.
  • Air engaged friction brakes are designed for horizontal mounting. If vertical mounting is required, consult engineering.


  • Air engaged friction brakes are suitable for stopping, holding and cycling applications.
  • Maximum RPM varies by model and is listed on the PDF detail sheet (see table below). Consult engineering┬áif the intended application exceeds the listed maximum RPM.

Design Features

  • Air engaged brakes are made-to-order with any bore size up to the maximum shown for easy installation.
  • Drilled and slotted flange allows for variable installation arrangements.
  • Low coefficient friction lining versions are available for applications requiring slip or a narrower torque range. Contact engineering for details.
Product CodeTorque @ 80 PSIMaximum Bore with Standard KeywayDetail SheetRequest 3D CAD Model
B2F2R-STH100 lb-in0.500 in (12 mm)View PDFRequest
B3F2R-STH267 lb-in1.000 in (24 mm)View PDFRequest
B4F2R-STH760 lb-in1.250 in (31 mm)View PDFRequest
B5F2R-STH1,584 lb-in1.438 in (38 mm)View PDFRequest
B6F2G-STH3,118 lb-in2.000 in (52 mm)View PDFRequest
B8F2K-STH4,788 lb-in2.375 in (66 mm)View PDFRequest
BAF2K-STH9,673 lb-in2.750 in (72 mm)View PDFRequest