FARR Coupling

The FARR Coupling is utilized when a rigid connection is needed among the low velocity shaft of a gearbox as well as the head shaft of a conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized properly, the FARR Coupling will carry the applica-tion torque, fat of gearbox, motor and swing plate. While in the case of the mixer, it can carry the weight with the shaft and impeller, thrust forces and resulting bending moments.
Components of the FARR Coupling include male and female piloted hubs produced from 4140 alloy steel. The hubs are extended to assure 80% hub to shaft contact. Keeper plates are included for security. The two hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Typical coupling sizes have a nominal torque vary from eleven,300 to five,736,000 in-lbs. More substantial sizes can be found based on the application.
Characteristics
Heat Handled 4140 alloy steel
Male and Female pilots
Greater Torque Capacity
Grade eight Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length by means of bore
Keeper Plate layout
FARR Coupling Selection Manual
A. Obtain The next Facts:
Application
Horsepower & RPM
Gearbox (Reducer) Ratio
Output Pace
All Shaft Sizes
Overhang Load
Lever Arm
(Distance from end of Gearbox output Shaft to Center-Line of Gearbox or Center Line of Gravity)
B.Calculate Application Torque:
T (in-lb) = ¡ê¡§HP x 63025¡ê?/RPM
C.Calculate Design Torque by applying 2.0 Service Factor to application torque.
D.Select coupling with a torque capacity equal to or greater than the Style Torque from the Performance Data table.
E.Verify that the Bore capacity in the coupling will meet the application shaft requirements.
F.The Male pilot hub to always be used on the Reducer (Gearbox or Driver) shaft and the Female pilot hub to always be applied over the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling assortment.