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February 19, 2021

Jaw Type Coupling Choice Process
The selection course of action for determining the correct jaw coupling size and elastomer calls for employing the charts shown within the following pages. There are actually 3 parts to get selected, two hubs and a single elastomer. Once the shaft dimension of your driver and driven in the application are from the similar diameter, the hubs picked will likely be the exact same. When shaft diameters vary, hubs selected will vary accordingly.
Data important ahead of a coupling is often picked:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven equipment and corresponding keyways
Application description
Environmental situations (i.e. severe temperature, corrosive conditions, area limitations)
Actions In Deciding on A Jaw Coupling
Phase one: Establish the Nominal Torque of your application by utilizing the following formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Phase two: Employing the Application Service Variables Chart one decide on the support element which finest corresponds to your application.
Step three: Determine the Design Torque of the application by multiplying the Nominal Torque calculated in Step one by the Application Services Factor established in Phase two.
Style and design Torque = Nominal Torque x Application Services Factor
Phase four: Using the Spider Performance Data Chart 2, pick the elastomer materials which best corresponds to your application.
Step five: Employing the Jaw Nominal Rated Torque Chart 3 , locate the ideal elastomer materials column for your elastomer chosen in Step four.
Scan down this column on the initially entry the place the Torque Worth while in the acceptable column is better than or equal to the Layout Torque calculated in Stage three.
After this worth is found, refer to the corresponding coupling dimension within the initial column of your Jaw Nominal Rated Torque Chart three .
Refer to the greatest RPM worth for this elastomer torque capability to guarantee that the application prerequisites are met. If your necessity is just not satisfied at this point, one more type of coupling could be required for your application. Please talk to Lovejoy engineering for assistance.
Phase six: Assess the application driver/driven shaft sizes to the greatest bore size available around the coupling chosen. If coupling bore size is just not significant ample for your shaft diameter, choose the following greatest coupling that may accommodate the driver/driven shaft diameters.
Step 7: Using the UPC number variety table , come across the proper Bore and Keyway sizes needed and locate the number.