The FARR Coupling is used when a rigid connection is required between the low speed shaft of the gearbox and the head shaft of the conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized appropriately, the FARR Coupling will carry the applica-tion torque, excess weight of gearbox, motor and swing plate. In the case of a mixer, it will carry the excess weight on the shaft and impeller, thrust forces and resulting bending moments.
Components 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 integrated for security. The two hubs are assembled with Grade eight bolts and Grade À Prevailing Torque nuts. Normal coupling sizes possess a nominal torque range from 11,300 to 5,736,000 in-lbs. Larger sizes are available according to the application.
Functions
Heat Taken care of 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 and design
FARR Coupling Choice Guide
A. Obtain The next Facts:
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 capacity equal to or greater than the Design and style Torque from the Performance Data table.
E.Verify that the Bore capability on the coupling will meet the application shaft requirements.
F.The Male pilot hub to always be utilised over the Reducer (Gearbox or Driver) shaft and the Female pilot hub to always be made use of about the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling choice.