The FARR Coupling is utilized when a rigid connection is required amongst the very low velocity shaft of a gearbox and the head shaft of a conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized appropriately, the FARR Coupling will carry the applica-tion torque, weight of gearbox, motor and swing plate. Within the case of a mixer, it will carry the excess weight with the shaft and impeller, thrust forces and resulting bending moments.
Parts of a FARR Coupling consist of male and female piloted hubs created from 4140 alloy steel. The hubs are extended to assure 80% hub to shaft get in touch with. Keeper plates are integrated for safety. The 2 hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Common coupling sizes 
have a nominal torque range from 11,300 to five,736,000 in-lbs. Larger sizes can be found based on the application.
Characteristics
Heat Handled 4140 alloy steel
Male and Female pilots
Improved Torque Capability
Grade 8 Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length by means of bore
Keeper Plate design and style
FARR Coupling Variety Guidebook
A. Obtain The following Information:
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 capacity equal to or greater than the Design and style 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 applied within the Reducer (Gearbox or Driver) shaft and also the Female pilot hub to always be utilized around the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling choice.
