Overrunning Clutches & Backstops

GFK Series

GFK Series Clutch

Model GFK is a sprag type clutch integrated into a 59 Series ball bearing.

This design provides high torque capacity for minimal outside diameter.

It is a bearing supported type, shipped grease lubricated.

Oil bath lubrication is also possible if the original grease is first removed by flushing the clutch with a suitable solvent.

Whatever the lubrication type, seals should be provided, as illustrated below.

Torque transmission must be ensured by a press fit assembly into a rigid outer housing with R6 tolerance, and onto a shaft with p5 tolerance.

The total press fit on the GFK should not exceed the internal clearance for the model as listed in the Internal Clearance Column.

    • Bearing supported type, shipped grease lubricated.
    • Operating temperature ranges from -4°F to +212°F (-20°C to +100°C)
    • Peaks up to 248°F (+120°C) are acceptable for short periods

    Formsprag Clutch
    23601 Hoover Rd.
    Warren, MI 48089 - USA
    Toll Free:1-800-348-0881 (Press #1)
    Web: CONTACT
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