The FARR Coupling is employed whenever a rigid connection is needed in between the minimal pace shaft of the gearbox and the head shaft of the conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized appropriately, the FARR Coupling will carry the applica-tion torque, bodyweight of gearbox, motor and swing plate. Within the case of the mixer, it will eventually carry the bodyweight from 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 get hold of. Keeper plates are included for safety. The 2 hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Standard coupling sizes have a nominal torque range from 11,300 to 5,736,000 in-lbs. Greater sizes are available determined by the application.
Characteristics
Heat Treated 4140 alloy steel
Male and Female pilots
Increased Torque Capacity
Grade 8 Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length through bore
Keeper Plate style
FARR Coupling Variety Guide
A. Obtain The following Information and 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 Design and style Torque by applying 2.0 Service Factor to application torque.
D.Select coupling with a torque capability equal to or greater than the Style and design Torque from the Performance Data table.
E.Verify that the Bore capacity of your coupling will meet the application shaft requirements.
F.The Male pilot hub to always be employed over the Reducer (Gearbox or Driver) shaft and also 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 selection.
