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FN series

Product catalog summary

Application Example: The document describes the use of an internal freewheel FN 20 as a backstop on the drive shaft of running gears in a chain conveyor. In normal operation, the freewheel operates in freewheeling mode, preventing the running gears from moving backward uncontrollably in case of a fault.

Internal Freewheels FN: These are designed for keyway connection on the outer ring with rollers and can be used as a backstop, overrunning clutch, or indexing freewheel. They are compact and space-saving, with nominal torques up to 3,000 Nm and bores up to 60 mm.

Features: The freewheels lack bearing support and require customer housing for installation. The outer ring has grooves for torque transmission, and the faces of both sides are designed for this purpose.

Specifications: The document provides a table listing various freewheel sizes, nominal torques, maximum speeds, and dimensions. For example, the FN 20 has a nominal torque of 1,900 Nm and a bore of 36 mm.

Mounting: The freewheels require concentric alignment of the inner and outer rings, with specific tolerances for the housing bore and shaft. The outer ring must be enclosed in a stable housing to transmit the listed torques.

Lubrication: Proper oil lubrication of specified quality is necessary for operation.

Ordering Example: For ordering, specify the freewheel size, such as FN 45, standard type. Freewheels with certain bore diameters are available with short delivery times.

Additional Information: The maximum transmissible torque is twice the specified nominal torque. Keyway specifications follow DIN 6885 standards.

Catalog excerpts

Internal Freewheels FN for keyway connection on the outer ring with rollers Application as ➧ Backstop ➧ Overrunning Clutch ➧ Indexing Freewheel Features Internal Freewheels FN are roller freewheels without bearing support. The freewheel is built into the customer housing. This makes compact, space-saving fitting solutions possible. Nominal torques up to 3 000 Nm. The faces of both sides of the outer ring are provided with grooves for torque transmission. Bores up to 60 mm. 92-1 Application example Internal freewheel FN 20 as a backstop, on the drive shaft of running gears on a chain conveyor. In normal operation, the drive shaft drives and the freewheel works in freewheeling operation. The freewheel as a backstop prevents the running gears from being able to run backwards uncontrolled in the event of a fault.

Open the catalog to page 1

Internal Freewheels FN for keyway connection on the outer ring with rollers 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. Internal Freewheels FN are without bearing support. Concentric alignment of inner and outer ring must be provided by the customer. The tolerance of the housing bore D must be ISO H7 or G7 and...

Open the catalog to page 2

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