The FARR Coupling is utilised whenever a rigid connection is needed concerning the minimal pace shaft of a gearbox as well as head shaft of the conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized adequately, the FARR Coupling will carry the applica-tion torque, weight of gearbox, motor and swing plate. In the case of the mixer, it’s going to carry the excess weight in the shaft and impeller, thrust forces and resulting bending moments.
Elements of the FARR Coupling include male and female piloted hubs produced from 4140 alloy steel. The hubs are extended to assure 80% hub to shaft make contact with. Keeper plates are integrated 
for security. The 2 hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Common coupling sizes possess a nominal torque range from eleven,300 to five,736,000 in-lbs. Bigger sizes can be found depending on the application.
Features
Heat Treated 4140 alloy steel
Male and Female pilots
Elevated Torque Capability
Grade eight Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length as a result of bore
Keeper Plate design and style
FARR Coupling Assortment Guidebook
A. Obtain The following Information:
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 Design 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 capability in the coupling will meet the application shaft requirements.
F.The Male pilot hub to always be used on the Reducer (Gearbox or Driver) shaft as well as the Female pilot hub to always be made use of on the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling choice.
