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FDN series

FDN series

Product catalog summary

Application Example: The document describes the use of an Internal Freewheel FDN 40 CFR as an overrunning clutch in a textile machine. The gear wheel is connected to an auxiliary drive, allowing the machine to be driven by the auxiliary drive during setup.

Applications: Internal Freewheels FDN can be used as a Backstop, Overrunning Clutch, or Indexing Freewheel.

Features: These freewheels are sprag freewheels with anti-friction bearing dimensions. They can accept radial forces and have nominal torques up to 2,400 Nm. The torque is transmitted on the outer ring by press fit, with bores available up to 80 mm.

Mounting: The standard type lacks bearing support, requiring concentric alignment by the customer. The outer ring must be housed in steel or grey cast iron with a minimum quality of GG-20. Housing bore tolerance must be ISO P6, and shaft tolerance ISO h6 or j6. Operating temperature ranges from -40°C to 80°C.

Lubrication: Oil lubrication of specified quality is necessary.

Ordering Example: For a Freewheel size FDN 30 with a 20 mm bore, the order would be FDN 30 CFH, d = 20 mm.

Additional Information: The maximum transmissible torque is twice the nominal torque. Keyway specifications follow DIN 6885 standards. Maximum speed values depend on installation conditions.

Catalog excerpts

Internal Freewheels FDNfor press fit on the outer ring with sprags Application as Backstop ► Overrunning Clutch ► Indexing Freewheel Features Internal Freewheels FDN are sprag freewheels with anti-friction bearing dimensions. The standard type does not have bearing support. In the case of the standard type, every second sprag has been replaced by a cylindrical roller; this freewheel can accept radial forces. Nominal torques up to 2 400 Nm.The torque is transmitted on the outer ring by press fit. Bores up to 80 mm. A multitude of standardized bore diameters are available with short delivery times. Application example Internal Freewheel FDN 40 CFR in standard type with bearing support as an overrunning clutch on the shaft end of the main drive of a textile machine.The gear wheel is linked to an auxiliary drive. In normal operation (freewheeling operation) the inner ring overruns and the gear wheel with the pressed-in outer ring is at a standstill. During set-up, the machine is driven by the slowly running auxiliary drive via the gear wheel and the freewheel that is working in driving operation.

Open the catalog to page 1

Internal Freewheels FDNfor press fit on the outer ring with sprags 81-1 ■ 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. The maximum speed values listed above apply to installation conditions as they are given for Complete Freewheels. If the actual installation conditions are known, higher speeds may be permitted under certain circumstances. Keyway according to DIN 6885,page 1 • Tolerance of keyway width JS10. * Keyway...

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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