The FARR Coupling is employed whenever a rigid connection is required between the minimal pace shaft of the gearbox as well as the head shaft of the conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized effectively, the FARR Coupling will carry the applica-tion torque, weight of gearbox, motor and swing plate. From the situation of a mixer, it will eventually carry the bodyweight in the shaft and impeller, thrust forces and resulting bending moments.
Parts 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 get in touch with. Keeper plates are included for security. The two hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Common coupling sizes have a nominal torque vary from 11,300 to 5,736,000 in-lbs. More substantial sizes can be found dependant upon the application.
Functions
Heat Taken care of 4140 alloy steel
Male and Female pilots
Enhanced Torque Capacity
Grade eight Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length through bore
Keeper Plate style
FARR Coupling Selection Manual
A. Obtain The following 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 Design Torque by applying 2.0 Service Factor to application torque.
D.Select coupling with a torque capacity equal to or greater than the Design and style Torque from the Performance Data table.
E.Verify that the Bore capacity of your coupling will meet the application shaft requirements.
F.The Male pilot hub to always be utilized about the Reducer (Gearbox or Driver) shaft and the Female pilot hub to always be employed around the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling selection.