The FARR Coupling is utilized whenever a rigid connection is required between the lower velocity shaft of a gearbox plus the head shaft of the conveyor, bucket elevator, mixer or any over-hung or suspended load. When sized properly, the FARR Coupling will carry the applica-tion torque, excess weight of gearbox, motor and swing plate. From the situation of the mixer, it’s going to carry the weight in the shaft and impeller, thrust forces and resulting bending moments.
Elements of the FARR Coupling include male and female piloted hubs created 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 eight bolts and Grade À Prevailing Torque nuts. Conventional coupling sizes have a nominal torque range from eleven,300 to five,736,000 in-lbs. Bigger sizes are available based on the application.
Functions
Heat Taken care of 4140 alloy steel
Male and Female pilots
Increased Torque Capacity
Grade 8 Bolts / Grade ?¡ãC?¡À Prevailing Torque Nuts
Extended length by means of bore
Keeper Plate style and design
FARR Coupling Assortment Manual
A. Obtain The following Information:
Application
Horsepower & Female%20Piloted%20HubRPM
Gearbox (Reducer) Ratio
Output Pace
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 and style Torque by applying 2.0 Service Factor to application torque.
D.Select coupling with a torque capability equal to or greater than the Design and style Torque from the Performance Data table.
E.Verify that the Bore capacity from the coupling will meet the application shaft requirements.
F.The Male pilot hub to always be utilized around the Reducer (Gearbox or Driver) shaft and also the Female pilot hub to always be applied over the Head (Driven) shaft.
G.Drive System Analysis must be performed by Application Engineering to verify coupling selection.