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FD series

Product catalog summary

Application Example: The document describes the use of two Internal Freewheels FD 40 CFR as overrunning clutches in the drive of transport rollers within a packaging distribution unit. During normal operation, these freewheels drive the rollers, but at the withdrawal station, they allow packages to slip off easily as the drive is overrun.

Internal Freewheels FD: These are sprag freewheels designed for press fit on the outer ring and can be used as a Backstop, Overrunning Clutch, or Indexing Freewheel. They do not include an inner ring, using the customer's hardened and ground shaft as the inner track. The standard type lacks bearing support and can accept radial forces due to the replacement of every second sprag with a cylindrical roller.

Specifications: Nominal torques can reach up to 2,400 Nm, with torque transmitted on the outer ring by press fit. The document provides a table with dimensions and specifications for various freewheel sizes, including nominal torque, maximum speed, and load ratings.

Mounting Instructions: The freewheels require concentric alignment of the inner and outer rings, which must be provided by the customer. The housing must be made of steel or grey cast iron with a minimum quality of GG-20, and the housing bore tolerance must be ISO P6. The permissible operating temperature ranges from -40°C to 80°C.

Lubrication: Oil lubrication of specified quality is necessary for operation.

Ordering Information: An example is provided for ordering a freewheel size FD 12, standard type, as FD 12 CFH. Freewheels FD are available with short delivery times, and the maximum transmissible torque is twice the specified nominal torque.

Additional Notes: The document mentions that higher speeds may be permitted under certain conditions if the actual installation conditions are known. Technical points regarding the sprag track are referenced on page 104.

Catalog excerpts

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).

Open the catalog to page 1

Internal Freewheels FD for press fit on the outer ring with sprags Indexing Freewheel Overrunning Clutch Backstop 81-1 Standard type For universal use Standard type with bearing support For universal use Mounting Internal freewheels FD in type standard 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 torque is transmitted on the outer ring by press fit. In order to transmit the torques specified in the table, the outer ring must be accommodated in a housing with an external diameter...

Open the catalog to page 2

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