Suma Precision Machinery

Features
Complete Freewheels FA with torque arm are sprag freewheels with sleeve bearings. They are grease-lubricated and require no maintenance.
The freewheels FA are used as:
➧ Backstops
➧ Indexing Freewheels
for applications with low speed freewheeling operation when used as a backstop or with a low to medium total number of actuations when used as an indexing freewheel.
In addition the standard type, two other types are available for extended service life and indexing accuracy.
Maximum torques up to 3 690 lb-ft.
Bores up to 3.15 inch.

Application example
Two Complete Freewheels FA 57 in the roller feed of a sheet metal processing machine. The indexing freewheel arranged on the left is driven via a bell crank with an adjustable lift. This enables an infinite setting of the feed. The backstop arranged on the right prevents the indexing rollers from running backwards while the indexing freewheel carries out its back stroke. Often, an additional small brake is provided in order to prevent the accelerated sheet metal strip from advancing.

See page 9 for determination of selection torque.

Keyway dimensions upon request by customers.

Mounting
When used as a backstop, the backdriving torque is supported by the torque arm. The torque arm must not be clamped into position. It must have 0.002 to 0.008 inch play in the axial and radial directions.

When used as an indexing freewheel, the torque arm serves as the indexing lever arm.

The torque arm is not heat treated enabling thecustomer alter the torque arm to suit his application.

The recommended tolerance of the shaft is + 0 / - 0.001 inch.