The FARR Coupling is employed whenever a rigid connection is required between the reduced velocity shaft of a 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, bodyweight of gearbox, motor and swing plate. Inside the situation of a mixer, it will eventually carry the bodyweight from the shaft and impeller, thrust forces and resulting bending moments.
Elements 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 speak to. Keeper plates are incorporated for safety. The 2 hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Standard coupling sizes possess a nominal torque vary from eleven,300 to 5,736,000 in-lbs. Larger sizes are available based on the application.
Attributes
Heat Taken care of 4140 alloy steel
Male and Female pilots
Elevated Torque Capability
Grade 8 Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length by bore
Keeper Plate layout
FARR Coupling Selection Manual
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 Torque by applying 2.0 
Service Factor to application torque.
D.Select coupling with a torque capacity equal to or greater than the Layout 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 made use of within the Reducer (Gearbox or Driver) shaft and also the Female pilot hub to always be made use of over the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling variety.
