Cam Sprag Lift Off X Sprag Type Chrome Steel Bearing For Gearbox

FXM200-63 One Way Backstop Cam Clutch for Gearbox

Description of FXM200-63 One Way Backstop Cam Clutch

Sprag lift-off X

Integrated Freewheels FXM are equipped with sprag lift-off X. The sprag lift-off X is used for backstops and overrunning clutches, provided that in freewheeling operation the inner ring is rotating at high speed and providing with overrunning clutches that the driving operation is conducted at low speed. In freewheeling operation, the centrifugal force F C causes the sprag to lift off from the outer track. In this operating state, the freewheel works wear-free, i.e. with unlimited service life.

Figure shows a freewheel with sprag lift-off X in freewheeling operation . The sprags, which are supported in a cage connected with the inner ring, rotate with the inner ring. The centrifugal force F C that is applied in the center of gravity S of the sprag turns the sprag counterclockwise and rests against the support ring of the cage. This results in the gap a between the sprag and the outer track; the freewheel works with out contact. If the inner ring speed decreases to such an extent that the effect of the centrifugal force on the sprag is less than that of the spring force F F , the sprag again rests on the outer ring and the freewheel is ready to lock . If used as an overrunning clutch, the driving speed must not exceed 40% of the lift-off speed.

Features

Integrated Freewheels FXM are sprag free -wheels without bearing support and with sprag

lift-off X.

The sprag lift-off X ensures a wear-free freewheeling operation when the inner ring rotates at high speed.

Lubrication

At speeds in excess of the sprag lift-off speed, no special lubrication is required; the freewheel

functions maintenance-free. When operating below the sprag lift-off speed, an oil lubrication of the specified oil quality must be provided.