Application as Backstop for applications with low to medium speeds in freewheeling operation. Features Complete Freewheel FGR ... R A3A4 with lever arm are sealed roller freewheels with ball bearings. They are oil lubricated. The freewheels FGR ... R A3A4 have an end cover and are fitted to shaft ends. The oil filling is carried out after the freewheel has been installed. Nominal torques up to 68 000 Nm. Bores up to 150 mm. Application example Complete Freewheel FGR 45 R A3A4 as a backstop on the opposite ends of the drive shaft of a bucket conveyor. In the case of a motor stop, the bucket conveyor must be held securely so that the conveyor goods do not pull the belt backwards and, in doing so, drive the motor quickly. The backdriving torque is supported by the lever arm with holding pin on the housing. If the holding pin is removed, the belt shaft can be turned in both directions.

Complete Freewheels Standard type For universal use ■ Freewheels with bore diameters highlighted blue in the table 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. Keyway according to DIN 6885, page 1 • Tolerance of keyway width JS10. 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,...