February 19, 2021

Jaw Type Coupling Choice Approach
The selection approach for determining the correct jaw coupling dimension and elastomer calls for employing the charts shown over the following pages. You will discover three elements to be selected, two hubs and one elastomer. When the shaft size with the driver and driven of the application are of the exact same diameter, the hubs chosen will likely be the same. When shaft diameters differ, hubs chosen will differ accordingly.
Details essential before a coupling is often picked:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven products and corresponding keyways
Application description
Environmental disorders (i.e. excessive temperature, corrosive ailments, area limitations)
Techniques In Choosing A Jaw Coupling
Stage 1: Ascertain the Nominal Torque of the application through the use of the next formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Step two: Making use of the Application Service Components Chart one select the support component which best corresponds to your application.
Phase three: Determine the Design and style Torque of the application by multiplying the Nominal Torque calculated in Stage 1 through the Application Services Component established in Phase 2.
Layout Torque = Nominal Torque x Application Support Component
Step 4: Employing the Spider Effectiveness Data Chart 2, choose the elastomer material which greatest corresponds for your application.
Step 5: Utilizing the Jaw Nominal Rated Torque Chart 3 , find the acceptable elastomer material column for your elastomer picked in Stage 4.
Scan down this column on the very first entry where the Torque Value within the appropriate column is greater than or equal on the Style and design Torque calculated in Phase three.
The moment this worth is located, refer to the corresponding coupling size in the 1st column of your Jaw Nominal Rated Torque Chart three .
Refer for the maximum RPM value for this elastomer torque capability to make certain that the application requirements are met. In the event the requirement is not happy at this time, a different kind of coupling could be expected for the application. Please check with Lovejoy engineering for assistance.
Phase 6: Examine the application driver/driven shaft sizes to the maximum bore size obtainable on the coupling chosen. If coupling bore size just isn’t massive adequate to the shaft diameter, select the following biggest coupling that may accommodate the driver/driven shaft diameters.
Phase 7: Using the UPC amount variety table , discover the proper Bore and Keyway sizes expected and find the amount.