The FARR Coupling is utilised when a rigid connection is needed in between the low velocity shaft of a gearbox as well as the head shaft of the conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized effectively, the FARR Coupling will carry the applica-tion torque, bodyweight of gearbox, motor and swing plate. From the situation of a mixer, it is going to carry the weight of 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 get hold of. Keeper plates are integrated for safety. The two hubs are assembled with Grade eight bolts and Grade À Prevailing Torque nuts. Normal coupling sizes possess a nominal torque range from eleven,300 to five,736,000 in-lbs. More substantial sizes can be found based upon the application.
Options
Heat Taken care of 4140 alloy steel
Male and Female pilots
Increased Torque Capacity
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:
Application
Horsepower & RPM
Gearbox (Reducer) Ratio
Output Speed
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 Layout Torque by applying 2.0 Service Factor to application torque.
D.Select coupling with a torque capability equal to or greater than the Design Torque from the Performance Data table.
E.Verify that the Bore capacity of the coupling will meet the application shaft requirements.
F.The Male pilot hub to always be applied about the Reducer (Gearbox or Driver) shaft along with the Female pilot hub to always be utilised to the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling choice.