The FARR Coupling is utilized whenever a rigid connection is needed involving the very low speed shaft of a gearbox plus the head shaft of the conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized thoroughly, the FARR Coupling will carry the applica-tion torque, weight of gearbox, motor and swing plate. In the situation of the mixer, it’ll carry the bodyweight of the shaft and impeller, thrust forces and resulting bending moments.
Parts of the FARR Coupling consist of male and female piloted hubs produced from 4140 alloy steel. The hubs are extended to assure 80% hub to shaft make contact with. Keeper plates are integrated for security. The two hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Regular coupling sizes possess a nominal torque range from 11,300 to 5,736,000 in-lbs. Bigger sizes can be 
found according to the application.
Options
Heat Treated 4140 alloy steel
Male and Female pilots
Increased Torque Capability
Grade 8 Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length by means of bore
Keeper Plate layout
FARR Coupling Choice Manual
A. Obtain The next Information and facts:
Application
Horsepower & RPM
Gearbox (Reducer) Ratio
Output Speed
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 and style Torque by applying 2.0 Service Factor to application torque.
D.Select coupling with a torque capacity equal to or greater than the Design Torque from the Performance Data table.
E.Verify that the Bore capability of your coupling will meet the application shaft requirements.
F.The Male pilot hub to always be made use of about the Reducer (Gearbox or Driver) shaft and the Female pilot hub to always be employed around the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling choice.
