BA...XG BC...XG Complete Freewheels with lever arm

  MODEL : Complete Freewheels  BA...XG BC...XG

Complete Freewheels BA … XG and BC … XG

with lever arm

with sprag lift-off X and grease lubrication

Features

Complete Freewheels BA … XG and BC … XG with lever arm are sprag freewheels with sprag

lift-off X and grease-lubricated ball bearings. The sprag lift-off X ensures wear-free freewheeling operation when the inner ring rotates at high speed. The freewheels BA … XG have an end cover and are fitted to shaft ends. The freewheels BC … XG are arranged on

through shafts or shaft ends. The freewheels BA … XG and BC … XG are used as:

 Backstops

for applications with high speed freewheeling operation.

Nominal torques up to 42 500 Nm. Bores up to 150 mm.

Application example

Complete Freewheel BA 52 SXG as a backstop on a radial fan. The backstop prevents a reverse rotation of the fan shaft from air flow or from an incorrectly polarized drive motor. By pulling out the holding pin in the lever arm, the shaft can be turned in both directions in order to carry out maintenance work. With the high shaft speed, the type with sprag lift-off X is used; the sprags work in freewheeling operation without contact and hence are wear-free.

Mounting

The backdriving torque is supported by the lever arm with holding pin. The holding pin engages in a slot or bore in the frame of the machine. It must have 0,5 to 2 mm play in the axial

and radial directions. If the holding pin is removed, the shaft can be turned in both directions.

The tolerance of the shaft must be ISO h6 or j6. The freewheels BC … XG are supplied ready for installation. In the case of freewheels BA … XG, the inner ring must be secured axially with a retainer plate.

Example for ordering

Freewheel size BC 45 type with sprag lift-off X, grease lubrication and 65 mm bore:

• BC 45 SXG, d = 65 mm

When ordering, please also specify the freewheeling direction of the inner ring when

viewed in direction X:

• counterclockwise free or

• clockwise free