Jaw Form Coupling Variety Method
The variety process for figuring out the correct jaw coupling dimension and elastomer involves working with the charts proven on the following pages. You’ll find three parts for being chosen, two hubs and one elastomer. Once the shaft dimension of your driver and driven of the application are on the very same 
diameter, the hubs chosen will probably be the exact same. When shaft diameters differ, hubs selected will vary accordingly.
Details important just before a coupling might be selected:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven tools and corresponding keyways
Application description
Environmental ailments (i.e. severe temperature, corrosive disorders, room limitations)
Measures In Deciding on A Jaw Coupling
Step 1: Determine the Nominal Torque of your application by utilizing the next formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Step 2: Utilizing the Application Support Variables Chart 1 select the support aspect which very best corresponds to your application.
Step three: Calculate the Design Torque of your application by multiplying the Nominal Torque calculated in Step one through the Application Support Element established in Stage two.
Design Torque = Nominal Torque x Application Service Component
Stage four: Employing the Spider Overall performance Information Chart 2， decide on the elastomer material which most effective corresponds for your application.
Step 5: Applying the Jaw Nominal Rated Torque Chart 3 , find the proper elastomer material column for your elastomer chosen in Step 4.
Scan down this column to the 1st entry wherever the Torque Value during the appropriate column is better than or equal towards the Style and design Torque calculated in Stage 3.
As soon as this value is located, refer for the corresponding coupling dimension within the very first column in the Jaw Nominal Rated Torque Chart three .
Refer to the greatest RPM value for this elastomer torque capability to make certain that the application specifications are met. In case the necessity is just not satisfied at this point, another type of coupling might be demanded for the application. Please consult Lovejoy engineering for help.
Phase six: Evaluate the application driver/driven shaft sizes to the maximum bore dimension obtainable on the coupling chosen. If coupling bore dimension isn’t significant sufficient for the shaft diameter, select the next biggest coupling that will accommodate the driver/driven shaft diameters.
Step seven: Applying the UPC quantity variety table , obtain the suitable Bore and Keyway sizes expected and locate the variety.