Sprag Clutch, Ball Bearing Freewheel Clutch Unit FKNN 6206 2RS

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FKNN 6206 2RS
Part NumberFKNN 6206 2RS
TypeBall Bearing Freewheel Clutch Unit
SpringZ (Tension)
SealedYes
Lubrication1Oil or Grease
Inner Ring KeywayYes
Outer Ring KeywayYes
Integrated Ball BearingYes
Integrated Roller BearingNo

Shaft & Housing Tolerances

Shaft Tolerancen6
Housing ToleranceN7
Shaft & Housing Chamfer1mm × 15°

Geometrical Data

Bore Diameterd [mm]30
Outer DiameterD [mm]62
WidthW [mm]16
Edge Radiusr [mm]1.5
Inner Ring Keyway Widthb [mm]8
Inner Ring Keyway Deptht [mm]2.0
Outer Ring Keyway Widthbor [mm]6
Outer Ring Keyway Depthtor [mm]2
Weight [kg]0.22

Ratings

Nominal TorqueT [N*m]148
Nominal TorqueT [ft*lb]109.2
Max. Static Radial LoadCstat [N]6066
Max. Dynamic Radial LoadCdyn [N]7859
Max. Indexing Frequency [Hz]10
Max. Speed - Unsealed3n [RPM]5100
Max. Speed - Sealedn [RPM]2400
Max. Temp. Unsealed4 [°C]140
Max. Temp. Sealed [°C]110

Notes:

  1. Standard lubrication is oil for unsealed clutches and grease for sealed clutches. Lubrication requirements are specific for proper sprag clutch function. Please consult catalog and/or GMN USA engineers.
  2. 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.
  3. 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.
  4. The stated temperature rating is for an injection molded cage. The maximum temperature rating is 170°C for a steel cage.

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