February 19, 2021

Jaw Variety Coupling Variety Procedure
The variety approach for figuring out the right jaw coupling dimension and elastomer needs making use of the charts shown over the following pages. You’ll find 3 components to become selected, two hubs and 1 elastomer. When the shaft size with the driver and driven in the application are in the exact same diameter, the hubs picked is going to be the same. When shaft diameters differ, hubs picked will differ accordingly.
Information and facts essential prior to a coupling might be picked:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven products and corresponding keyways
Application description
Environmental circumstances (i.e. intense temperature, corrosive circumstances, room limitations)
Steps In Picking A Jaw Coupling
Phase 1: Determine the Nominal Torque of the application by utilizing the next formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Phase two: Working with the Application Services Aspects Chart one select the services aspect which ideal corresponds for your application.
Phase three: Calculate the Style Torque of your application by multiplying the Nominal Torque calculated in Phase one from the Application Service Element established in Phase 2.
Design and style Torque = Nominal Torque x Application Support Element
Step four: Utilizing the Spider Overall performance Information Chart 2, choose the elastomer materials which greatest corresponds for your application.
Step five: Working with the Jaw Nominal Rated Torque Chart three , find the ideal elastomer material column for that elastomer selected in Step 4.
Scan down this column towards the 1st entry wherever the Torque Value in the suitable column is better than or equal for the Design Torque calculated in Step three.
Once this value is located, refer towards the corresponding coupling dimension in the first column of the Jaw Nominal Rated Torque Chart 3 .
Refer for the highest RPM worth for this elastomer torque capability to make certain the application demands are met. Should the requirement is not content at this point, a different form of coupling might be demanded for that application. Please seek the advice of Lovejoy engineering for support.
Phase 6: Compare the application driver/driven shaft sizes to your maximum bore dimension offered on the coupling selected. If coupling bore dimension is not huge enough to the shaft diameter, decide on the following greatest coupling that will accommodate the driver/driven shaft diameters.
Phase 7: Applying the UPC quantity selection table , discover the proper Bore and Keyway sizes necessary and find the variety.