CSK Series | Formsprag Clutch

The CSK Series is a sprag type clutch integrated into a 62 Series ball bearing (except sizes 8 and 40). 


CSK . .2RS clutches are .197” (5mm) wider than a standard 62 Series bearing, as they are equipped with lip seals for washdown applications .


CSK . .P has the same construction and outside dimensions as type CSK, but has a keyway on the inner race .

These clutches can be mounted on a shaft with recommended k6 tolerance and the outer race must be pressed into a rigid housing with a recommended N6 tolerance . The resulting housing and shaft diameters must be checked to ensure that the bearing has adequate radial clearances .


CSK . .PP features a keyway on both the inner and outer race . The recommended mounting tolerances are k6 on the shaft and K6 in the rigid housing . A h6 tolerance on the shaft or H6 in the housing are also acceptable for a light press fit assembly . Always check to ensure that the bearing has adequate radial clearances.

Product Features

  • Bearing supported, shipped grease lubricated and protected against dust larger than .012" (.3mm) diameter.
  • Available with additional lip seals (- 2RS) for enhanced sealing, as well as, with a keyway on the inner ring (-P) or the inner and outer ring (-PP) for additional ease of installation.
  • Operating temperature: 21 to 140°F (-6 to 60°C)
  • Special grease available for operating temperatures: -40 to 212°F (-40 to 100°C)

Product Data Sheets

  • p-956-fc_csk_csk_2rs
  • p-956-fc_csk_p_csk_pp
Click on image below to download pdf. To order hard copies of literature click here.

Product Catalog

  • CSK One Way Bearing Clutches

Service Manual

  • Overrunning Clutches Models ASK & CSK Installation

Related Literature

  • p-1723-4

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 CSK Series Clutch

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