LCB Series Fan Backstops | Formsprag Clutch

Models LCB-200 and 400 are economical, low-torque clutches designed to prevent problems associated with windmilling in fan applications. Units can be installed on vertical or horizontal fan shafts without the use of a key. The clutches can accommodate a range of shaft diameters between 1-7/8” and 5”. Units are maintenance-free and easy to install.

Product Features

  • Wide speed range between 0 and (LCB-200 3600/ LCB-400 1800 RPM).
  • Wide temperature operating range between -13 and 194 °F (-25 and 90 °C).
  • Wide bore range for fan shaft (LCB-200 Max 3.5”/ LCB-400 Max 5”) (89mm and 127mm).
  • Torque capacity (LCB-200 150 lb.ft (200Nm)/ LCB-400 850 lb.ft (1150Nm).
  • Drag torque, negligible, < 1.78 (20 Ncm)
  • Easy to install requiring only LCB-200 1.125” and LCB-400 2” of shaft engagement.
  • Lubricated for life (no maintenance required).
  • Bearing life L10 is over 200 years.
  • Compact design with only LCB-200 2-7/8”/ LCB-400 4.95” required space beyond the shaft end of the fan.
  • Self actuated with no power or utility required to operate.
  • Shaft mounted design has been tested to over 200% torque capacity.
  • Flexible torque arm design.
  • Meets ISO “G” 30 Balance

Product Data Sheets

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

Product Catalog

  • Overrunning, Indexing, Backstopping Clutches

Service Manual

  • Fan Backstops LCB-200 & LCB-400 Service & Install

Related Literature

  • LCB-200 & 400 Fan Backstops
  • 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

Formsprag Clutch LCB Backstop
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