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