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.
Freewheels 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.
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.