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FON series

FON series
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Application as Backstop ► Overrunning Clutch ► Indexing Freewheel Features Integrated Freewheels FON are sprag freewheels without bearing support. In addition to the standard type, two other types are available for extended service life and indexing accuracy. Nominal torques up to 25 000 Nm. Bores up to 155 mm. A multitude of standardized bore diameters are available with short delivery times. Application example Integrated Freewheel FON 57 SFT as an overrunning clutch, arranged on the main drive shaft of a packaging machine. The outer ring is connected to a creep drive by means of a gear wheel. This drive is used during set-up. In this operating state, the freewheel works in driving operation and drives the machine at a very low speed via the main shaft. In normal operation (freewheeling operation), the inner ring overruns and the creep drive is automatically disengaged. The RIDUVIT® sprags give the freewheel an extended service life. Mounting Integrated Freewheels FON are without bearing support. Concentric alignment of inner and outer ring must be provided by the customer. The permissible run out (T.I.R.) must be observed. The Integrated Freewheel FON is centered via the outer track F on the customer attachment part and bolted to this. The tolerance of the pilot diameter of the attachment part must be ISO h6. The tolerance of the shaft must be ISO h6 or j6. Lubrication In the case of standard type and type with RIDUVIT®, an oil lubrication of the specified oil quality must be provided. In the case of the type with sprag lift-off Z, at speeds in excess of the sprag lift-off speed, no special lubrication is required; the freewheel functions maintenance-free. When operating below the sprag lift-off speed, an oil lubrication of the specified oil quality must be provided. Example for ordering Freewheel size FON 72, type with RIDUVIT® and 45 mm bore: • FON 72 SFT, d = 45 mm

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■ Freewheels with bore diameters highlighted blue in the table are available with short delivery times. Keyway according to DIN 6885, page 1 ♦ Tolerance of keyway width JS10. * Keyway according to DIN 6885, page 3 ♦ Tolerance of keyway width JS10. ** Z = Number of fastening holes for screws G on pitch circle T.

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