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February 19, 2021

Jaw Form Coupling Variety Method
The assortment approach for figuring out the right jaw coupling dimension and elastomer calls for employing the charts shown on the following pages. You can find three components for being selected, two hubs and a single elastomer. When the shaft size with the driver and driven on the application are on the identical diameter, the hubs picked might be the same. When shaft diameters vary, hubs selected will differ accordingly.
Information essential prior to a coupling might be selected:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven equipment and corresponding keyways
Application description
Environmental circumstances (i.e. intense temperature, corrosive situations, room limitations)
Actions In Picking A Jaw Coupling
Phase 1: Figure out the Nominal Torque of your application by utilizing the next formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Phase two: Applying the Application Services Aspects Chart one select the services element which finest corresponds for your application.
Phase three: Calculate the Design and style Torque of your application by multiplying the Nominal Torque calculated in Step one through the Application Service Issue established in Step 2.
Layout Torque = Nominal Torque x Application Support Issue
Stage four: Utilizing the Spider Overall performance Information Chart 2, choose the elastomer materials which ideal corresponds for your application.
Step five: Applying the Jaw Nominal Rated Torque Chart three , locate the appropriate elastomer material column for that elastomer chosen in Step 4.
Scan down this column towards the initially entry wherever the Torque Value in the suitable column is better than or equal on the Style Torque calculated in Step three.
As soon as this value is found, refer towards the corresponding coupling dimension in the first column of the Jaw Nominal Rated Torque Chart 3 .
Refer on the greatest RPM worth for this elastomer torque capability to make certain the application necessities are met. If the requirement isn’t satisfied at this point, a different form of coupling could be demanded for the application. Please seek advice from Lovejoy engineering for support.
Step 6: Evaluate the application driver/driven shaft sizes to your maximum bore dimension readily available around the coupling chosen. If coupling bore dimension is not massive enough to the shaft diameter, decide on the following greatest coupling which will accommodate the driver/driven shaft diameters.
Step 7: Using the UPC amount selection table , locate the proper Bore and Keyway sizes necessary and find the number.