The FARR Coupling is employed whenever a rigid connection is required between the very low velocity shaft of the gearbox as well as head shaft of the conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized thoroughly, the FARR Coupling will carry the applica-tion torque, fat of gearbox, motor and swing plate. Within the situation of the mixer, it will carry the fat of your shaft and impeller, thrust forces and resulting bending moments.
Parts of a FARR Coupling include male and female piloted hubs produced from 4140 alloy steel. The hubs are extended to assure 80% hub to shaft get in touch with. Keeper plates are included for security. The two hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Conventional coupling sizes have a nominal torque range from eleven,300 to five,736,000 in-lbs. Greater sizes can be found based on the application.
Functions
Heat Handled 4140 alloy steel
Male and Female pilots
Elevated Torque Capability
Grade 8 Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length by way of bore
Keeper Plate style and design
FARR Coupling Selection Guidebook
A. Obtain The next Facts:
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 Design Torque by applying 2.0 Service Factor to application torque.
D.Select coupling with a torque capability equal to or greater than the Style 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 employed to the Reducer (Gearbox or Driver) shaft and 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 variety.