FRB Series Backstopping Clutches | Formsprag Clutch

Excellent for use as backstops by mounting the clutch’s inner race on the rotating shaft and attaching or anchoring the clutch’s outer race with a torque arm to a stationary member of the equipment. The Model FRB can also be used in applications that require low driving speeds and high inner race overrunning speeds.

Product Features

  • Centrifugal Throughout Sprags
  • No wear, Less drag
  • Horizontal or vertical mounting
  • Design can reduce operating cost with a 3 year maintenance interval

7 Models

  • Torque Range: up to 11,000 lb. ft. (16000 Nm)
  • Bore Range: up to 4.437 in. (112.70 mm)
  • Speed Range: must be above the lift off speed
  • Temperature Range: -40 to +150º F

Product Data Sheets


Click on image below to download pdf. To order hard copies of literature click here.

Product Catalog

Overrunning, Indexing, Backstopping Clutches

Service Manual

Overrunning Clutches FRB 400 thru 1027 Installation

Related Literature

Formsprag Clutch Line Card Application Guide Overruning Clutches

Contact Info

Formsprag Clutch
23601 Hoover Rd.
Warren, MI 48089 - USA
Toll Free: 1-800-348-0881 (Press #1)
Phone: 586-758-5000
Fax: 586-758-5204


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