Internal Freewheels FNRfor keyway connection on the outer ring with rollers and bearing Application as Backstop ► Overrunning Clutch ► Indexing Freewheel Features Internal Freewheels FNR are roller freewheels with bearing support. The freewheels of sizes 8 to 20 have a sleeve bearing. The sizes 25 to 60 have ball bearings, these enable higher speeds in freewheeling operation. The freewheel is built into the customer housing. This makes compact, space-saving fitting solutions possible. Nominal torques up to 3000 Nm. The faces of both sides of the outer ring are provided with grooves for torque transmission. Bores up to 60 mm. Application example Internal Freewheel FNR 40 as an indexing freewheel for an incremental drive in the feeding device of a wire processing machine. The indexing lever is driven by a crank operation. The back and forth movement is transferred by the indexing freewheel in a gradual rotating movement of the wire feeding device.

Internal Freewheels FNRfor keyway connection on the outer ring with rollers and bearing Si Standard type For universal use ■ Freewheels with bore diameters highlighted blue in the table are available with short delivery times. The maximum transmissible torque is 2 times the specified nominal torque. See page 14 for determination of selection torque. Keyway according to DIN 6885, page 1 • Tolerance of keyway width JS10. Freewheel Size Mounting The tolerance of the housing bore D must be ISO H7 or G7 and the tolerance of the shaft must be ISO h6 or j6. The outer ring has to be completely enclosed...