The FARR Coupling is used whenever a rigid connection is needed between the minimal pace shaft of a gearbox plus the head shaft of a conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized adequately, the FARR Coupling will carry the applica-tion torque, fat of gearbox, motor and swing plate. Inside the situation of a mixer, it will eventually carry the excess weight from the 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 integrated for security. 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. Greater sizes are available dependant upon the application.
Characteristics
Heat Taken care of 4140 alloy steel
Male and Female pilots
Enhanced Torque Capacity
Grade 8 Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length by means of bore
Keeper Plate style
FARR Coupling Choice Guidebook
A. Obtain The following Info:
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 Style Torque from the Performance Data table.
E.Verify that the Bore capacity in the coupling will meet the application shaft requirements.
F.The Male pilot hub to always be utilized to the Reducer (Gearbox or Driver) shaft and the Female pilot hub to always be made use of about the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling choice.