Sprag Clutch, Complete Freewheel Clutch Unit FPD 448 Z | GMN Bearing USA

Sprag Clutch, Complete Freewheel Clutch Unit FPD 448 Z

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FPD 448 Z
Part NumberFPD 448 Z
TypeComplete Freewheel Clutch Unit
SpringZ (Tension)
Inner Ring KeywayNo
Outer Ring KeywayNo
Integrated Ball BearingYes
Integrated Roller BearingYes

Shaft & Housing Tolerances

Shaft Toleranceh5
Housing ToleranceH6
Shaft & Housing Chamfer1mm × 15°

Geometrical Data

Bore Diameterd [mm]35
Outer DiameterD [mm]53
WidthW [mm]34
Weight [kg]0.23


Nominal TorqueT [N*m]262
Nominal TorqueT [ft*lb]193.2
Max. Static Radial LoadCstat [N]13440
Max. Dynamic Radial LoadCdyn [N]11642
Max. Indexing Frequency [Hz]10
Max. Speed2n [RPM]1300
Max. Operating Temperature [°C]110


  1. The stated speed and torque ratings are contingent on utilizing specified tolerances, correct installation techniques, and operating temperature and load conditions below the specified maximums. If specific applications differ, please consult GMN USA engineers.
  2. The stated RPM value is for the maximum freewheel rotational speed for the sprags, not the shaft or housing. High freewheel rotational speeds can produce centrifugal forces that can cause the sprags to lift off from frictional contact, therefore creating an opportunity for improper engagement and potential slip. The sprag RPM must be below the listed value before engagement occurs. The actual sprag freewheel speed is difficult to determine because the sprags are driven by frictional forces from the race(s) and lubrication. Theoretically there is no maximum rotational speed in the driving direction; the inner race, sprags, and outer race rotate as one unit unaffected by centrifugal forces. Please consult GMN USA engineers with high RPM applications that approach or exceed the stated RPM rating.

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