The FARR Coupling is utilised whenever a rigid connection is required in between the reduced velocity shaft of a gearbox and also 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, bodyweight of gearbox, motor and swing plate. Inside the situation of a mixer, it will carry the fat in 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 speak to. Keeper plates are incorporated for safety. The 2 hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Standard coupling sizes possess a nominal torque range from 11,300 to five,736,000 in-lbs. Bigger sizes can be found based on 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 as a result of bore
Keeper Plate style and design
FARR Coupling Selection Manual
A. Obtain The following Information and 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 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 of your coupling will meet the application shaft requirements.
F.The Male pilot hub to always be used about the Reducer (Gearbox or Driver) shaft as well as the Female pilot hub to always be used on the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling variety.