FARR Coupling

The FARR Coupling is applied whenever a rigid connection is needed amongst 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 appropriately, the FARR Coupling will carry the applica-tion torque, bodyweight of gearbox, motor and swing plate. In the case of a mixer, it will eventually carry the excess weight with the shaft and impeller, thrust forces and resulting bending moments.
Parts of a FARR Coupling include male and female piloted hubs made from 4140 alloy steel. The hubs are extended to assure 80% hub to shaft contact. Keeper plates are included for security. The two hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Regular coupling sizes possess a nominal torque vary from eleven,300 to 5,736,000 in-lbs. More substantial sizes can be found dependant upon the application.
Options
Heat Treated 4140 alloy steel
Male and Female pilots
Improved Torque Capability
Grade eight Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length by bore
Keeper Plate style
FARR Coupling Selection Guidebook
A. Obtain The next Details:
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 Style and design Torque by applying 2.0 Service Factor to application torque.
D.Select coupling with a torque capacity equal to or greater than the Style and design Torque from the Performance Data table.
E.Verify that the Bore capacity on the coupling will meet the application shaft requirements.
F.The Male pilot hub to always be utilised about the Reducer (Gearbox or Driver) shaft plus the Female pilot hub to always be used around the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling choice.