The FARR Coupling is used when a rigid connection is required among the very low velocity shaft of a gearbox as well as the head shaft of a conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized properly, the FARR Coupling will carry the applica-tion torque, bodyweight of gearbox, motor and swing plate. From the case of a mixer, it will eventually carry the weight of your shaft and impeller, thrust forces and resulting bending moments.
Components of the FARR Coupling include male and female piloted hubs made from 4140 alloy steel. The hubs are extended to assure 80% hub to shaft get in touch with. Keeper plates are incorporated for security. The two hubs are assembled with Grade eight bolts and Grade À Prevailing Torque nuts. Standard coupling sizes possess a nominal torque range from eleven,300 to five,736,000 in-lbs. Bigger sizes are available based upon the application.
Attributes
Heat Treated 4140 alloy steel
Male and Female pilots
Greater Torque Capacity
Grade 8 Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length through bore
Keeper Plate design
FARR Coupling Assortment Guidebook
A. Obtain The following Data:
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 Torque by applying 2.0 Service Factor to application torque.
D.Select coupling with a torque capability equal to or greater than the Style 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 utilized on the Reducer (Gearbox or Driver) shaft and the Female pilot hub to always be made use of around the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling selection.