Model HSB Backstopping Clutch | Formsprag Clutch

HSB units are intended for use as backstops on the high speed shaft or intermediate shaft of reducers and as holdbacks on the headshaft of conveyors. They use standard FSO Series clutches with the addition of an oil reservoir made from an aluminum casting with cooling fins. HSB models are designed to permit free oil flow between clutch and reservoir to provide increased cooling capacity and increase backstop life.

Product Features

  • 8 different sizes Bore range: 0.437 to 7.0 in.
  • Torque range: 300 to 27,000 lb.ft.
  • Speed range: 0 to 2,900 RPM
  • Designed for rebuilding & reducing long-term operation costs
  • Removable torque arm & easier installation
  • Formchrome sprags for longer wear life
  • Free action retainer tolerates larger concentricity fluctuations
  • Full range of options including set collars and restraint keys

Product Data Sheets

  • p-956-fc_hsb
Click on image below to download pdf. To order hard copies of literature click here.

Product Catalog

  • Overrunning, Indexing, Backstopping Clutches

Service Manual

  • High Speed Backstop Clutches HSB 400 thru 1027 Install

Related Literature

  • p-1723-4
  • Heavy Duty & Overrunning Clutch Brake Group Overview
  • HDOCB Engineering Capabilities

Product News

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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