The FARR Coupling is utilised whenever a rigid connection is required involving the minimal pace shaft of the gearbox plus the head shaft of a 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. During the case of the mixer, it will carry the excess weight of the shaft and impeller, thrust forces and resulting bending moments.
Elements of a FARR Coupling consist of 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 safety. The 2 hubs are assembled with Grade eight bolts and Grade À Prevailing Torque nuts. Standard coupling sizes have a nominal torque vary from 11,300 to five,736,000 in-lbs. Larger sizes are available dependant upon the application.
Options
Heat Taken care of 4140 alloy steel
Male and Female pilots
Increased Torque Capacity
Grade 8 Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length as a result of bore
Keeper Plate design
FARR Coupling Choice Guidebook
A. Obtain The following Information:
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 Design and style Torque by applying 2.0 Service Factor to application torque.
D.Select coupling with a torque capability equal to or greater than the Layout Torque from the Performance Data table.
E.Verify that the Bore capability with the coupling will meet the application shaft requirements.
F.The Male pilot hub to always be utilised within the Reducer (Gearbox or Driver) shaft along with the Female pilot hub to always be used within the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling choice.