The FARR Coupling is utilized when a rigid connection is required concerning the low speed shaft of the gearbox and the head shaft of a conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized effectively, the FARR Coupling will carry the applica-tion torque, weight of gearbox, motor and swing plate. Within the case of the mixer, it will carry the bodyweight on the shaft and impeller, thrust forces and resulting bending moments.
Components of a FARR Coupling consist of male and female piloted hubs made from 4140 alloy steel. The hubs are extended to assure 80% hub to shaft contact. Keeper plates are integrated for security. The two 
hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Conventional coupling sizes possess a nominal torque vary from eleven,300 to five,736,000 in-lbs. Bigger sizes can be found according to the application.
Options
Heat Treated 4140 alloy steel
Male and Female pilots
Improved Torque Capacity
Grade 8 Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length through bore
Keeper Plate design and style
FARR Coupling Choice Guidebook
A. Obtain The next Facts:
Application
Horsepower & RPM
Gearbox (Reducer) Ratio
Output Velocity
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 Layout Torque by applying 2.0 Service Factor to application torque.
D.Select coupling with a torque capability equal to or greater than the Style Torque from the Performance Data table.
E.Verify that the Bore capacity with the coupling will meet the application shaft requirements.
F.The Male pilot hub to always be applied over the Reducer (Gearbox or Driver) shaft as well as the Female pilot hub to always be used about the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling assortment.
