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FGR … R A3A4 series

FGR … R A3A4 series

Product catalog summary

Application Example: The document describes the use of a Complete Freewheel FGR 45 R A3A4 as a backstop on the drive shaft of a bucket conveyor. This setup ensures that in the event of a motor stop, the conveyor does not move backward, preventing the motor from being driven quickly in reverse. The backdriving torque is managed by a lever arm with a holding pin on the housing, which can be removed to allow bidirectional shaft movement.

Product Features: The Complete Freewheel FGR … R A3A4 is a sealed roller freewheel with ball bearings, designed for low to medium speeds in freewheeling operations. It is oil-lubricated, has an end cover, and is fitted to shaft ends. The nominal torque capacity is up to 68,000 Nm, with bore sizes up to 150 mm.

Specifications: The document provides a detailed table listing various sizes of the FGR R A3A4 freewheels, including nominal torque, maximum speed, bore diameter, and other dimensional parameters. The table highlights bore diameters available for quick delivery.

Mounting Instructions: The backdriving torque is supported by a lever arm with a holding pin, which should have 0.5 to 2 mm play in axial and radial directions. The shaft tolerance must be ISO h6 or j6. The inner ring of the freewheel must be axially secured with a retainer plate, and the freewheel must be filled with oil before use.

Ordering Information: The document provides an example for ordering, specifying that the basic freewheel, lever arm, cover, seals, and screws are supplied loose unless otherwise stated. An example order for a standard type with lever arm A3 and cover A4 is given as FGR 25 R A3A4.

Catalog excerpts

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.

Open the catalog to page 1

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,...

Open the catalog to page 2

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