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FNR series

FNR series

Product catalog summary

Application Example: The document describes the use of an Internal Freewheel FNR 40 as an indexing freewheel in a wire processing machine. The freewheel facilitates a gradual rotating movement in the wire feeding device through a crank-driven indexing lever.

Internal Freewheels FNR: These are designed for keyway connections on the outer ring and include rollers and bearings. They can function as a Backstop, Overrunning Clutch, or Indexing Freewheel.

Features: Internal Freewheels FNR are roller freewheels with bearing support. Sizes 8 to 20 have sleeve bearings, while sizes 25 to 60 have ball bearings for higher speeds. They are compact and space-saving, with nominal torques up to 3,000 Nm and bores up to 60 mm.

Specifications: The document provides a detailed table of dimensions and specifications for various sizes of freewheels, including bore diameter, weight, and nominal torque. The maximum transmissible torque is twice the nominal torque.

Mounting: The housing bore tolerance must be ISO H7 or G7, and the shaft tolerance must be ISO h6 or j6. The outer ring must be enclosed in a stable housing to transmit the listed torques.

Lubrication: Proper oil lubrication of specified quality is required.

Ordering Example: For ordering, specify the freewheel size, such as FNR 20, standard type. Freewheels with certain bore diameters are available with short delivery times.

Standards: Keyway specifications follow DIN 6885, with a tolerance of keyway width JS10.

Catalog excerpts

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.

Open the catalog to page 1

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...

Open the catalog to page 2

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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