The FARR Coupling is employed when a rigid connection is needed in between the minimal pace shaft of the gearbox along with 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. During the situation of the mixer, it will eventually carry the fat on the shaft and impeller, thrust forces and resulting bending moments.
Parts of a FARR Coupling include male and female piloted hubs created from 4140 alloy steel. The hubs are extended to assure 80% hub to shaft make contact with. Keeper plates are included for security. The two hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Typical coupling sizes have a nominal torque vary from 11,300 to 5,736,000 in-lbs. More substantial sizes can be found determined by the application.
Characteristics
Heat Taken care of 4140 alloy steel
Male and Female 
pilots
Greater Torque Capacity
Grade eight Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length via bore
Keeper Plate style
FARR Coupling Selection Manual
A. Obtain The next 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 Style 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 capability of the coupling will meet the application shaft requirements.
F.The Male pilot hub to always be employed to the Reducer (Gearbox or Driver) shaft and the Female pilot hub to always be employed within the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling selection.
