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FD series
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Internal Freewheels FD for press fit on the outer ring with sprags Application as ➧ Backstop ➧ Overrunning Clutch ➧ Indexing Freewheel Internal Freewheels FD are sprag freewheels without an inner ring. The customers hardened and ground shaft is used as the inner track. The standard type does not have bearing support. In the case of the standard type, every second sprag has been be 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. Application example Two Internal Freewheels FD 40 CFR of standard type with bearing support as overrunning clutches in the drive of the transport rollers in a packaging distribution unit. In normal operation, the transport rollers are driven by means of the freewheels that are working in driving operation. At the withdrawal station, the arriving packages can easily slip off as the drive is overrun by the freewheel (freewheeling operation).

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Internal Freewheels FDfor press fit on the outer ring with sprags Freewheels FD 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. The tolerance of the housing bore D must be ISO P6. Please note the technical points on page 104 regarding the sprag track...

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