The FARR Coupling is applied whenever a rigid connection is needed amongst the lower pace shaft of the gearbox plus the head shaft of a 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. From the situation of the mixer, it is going to carry the weight on the shaft and impeller, thrust forces and resulting bending moments.
Components 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 hold of. Keeper plates are incorporated for security. The 2 hubs are assembled with Grade 8 bolts and Grade À Prevailing Torque nuts. Typical coupling sizes possess a nominal torque range from 11,300 to five,736,000 in-lbs. Larger sizes are available based upon the application.
Attributes
Heat Taken care of 4140 alloy steel
Male and Female pilots
Elevated Torque Capability
Grade eight Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length by bore
Keeper Plate layout
FARR Coupling Variety Guidebook
A. Obtain The next 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 with the coupling will meet the application shaft requirements.
F.The Male pilot hub to always be applied around the Reducer (Gearbox or Driver) shaft and also the Female pilot hub to always be employed over the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling variety.