The FARR Coupling is employed whenever a rigid connection is required in between the minimal pace shaft of a gearbox and also the head shaft of the conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized correctly, the FARR Coupling will carry the applica-tion torque, fat of gearbox, motor and swing plate. During the situation of a mixer, it can carry the excess weight from the shaft and impeller, thrust forces and resulting bending moments.
Elements of the FARR Coupling consist of male and female piloted hubs produced from 4140 alloy steel. The hubs are extended to assure 80% hub to shaft contact. Keeper plates are included for security. The 2 hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Typical coupling sizes have a nominal torque vary from 11,300 to 5,736,000 in-lbs. Greater sizes are available according to the application.
Attributes
Heat Handled 4140 alloy steel
Male and Female pilots
Improved Torque Capacity
Grade eight Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length as a result of bore
Keeper Plate design
FARR Coupling Assortment Guide
A. Obtain The next 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 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 Layout Torque from the Performance Data table.
E.Verify that the Bore capacity with the coupling will meet the application shaft requirements.
F.The Male pilot hub to always be used to the Reducer (Gearbox or Driver) shaft as well as Female pilot hub to always be utilized within the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling selection.