one-way bearing clutch / internal / backstop / indexing
FDN series



  • Construction:

    bearing, internal

  • Applications:

    backstop, indexing, overrunning clutch

  • Torque:

    Min.: 16 Nm (11.801

    Max.: 2,400 Nm (1,770.1492

  • Diameter:

    Min.: 8 mm

    Max.: 80 mm

  • Rotational speed:

    Min.: 800 rpm (5,026.55 rad.min-1)

    Max.: 3,925 rpm (24,661.5 rad.min-1)


Internal Freewheels FDN is used by pressing on the outer ring with sprags, available in three types. The ring offers internal Free wheels FDN are sprag free wheels with anti-friction bearing dimensions.
Free wheels FDN are used generally as Backstops, Overrunning Clutches and Indexing Freewheels. The standard type and the type with P-grinding for increased service life and indexing accuracy do not have bearing support. In the case of the standard type, every second sprag is ­replaced by a cylindrical roller; this freewheel can accept radial forces. Specifications are- Nominal torques up to 2 400 Nm, Bores up to 80 mm. The torque is transmitted on the outer ring by press fit. Many standard bores are available.

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