The FARR Coupling is used whenever a rigid connection is needed involving the minimal pace shaft of the gearbox as well as 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, fat of gearbox, motor and swing plate. Inside the situation of the mixer, it’ll carry the fat of your shaft and impeller, thrust forces and resulting bending moments.
Elements 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 make contact with. Keeper plates are incorporated for safety. The 2 hubs are assembled with Grade eight bolts and Grade À Prevailing Torque nuts. Standard coupling sizes possess a nominal torque vary from 11,300 to five,736,000 in-lbs. Larger sizes can be found based upon the application.
Functions
Heat Taken care of 4140 alloy steel
Male and Female pilots
Increased Torque Capability
Grade 8 Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length via bore
Keeper Plate layout
FARR Coupling Selection Manual
A. Obtain The following Details:
Application
Horsepower & RPM
Gearbox (Reducer) Ratio
Output Pace
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 on the coupling will meet the application shaft requirements.
F.The Male pilot hub to always be used over the Reducer (Gearbox or Driver) shaft as well as the Female pilot hub to always be utilised on the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling variety.