February 19, 2021

Jaw Style Coupling Variety System
The selection system for identifying the right jaw coupling dimension and elastomer requires utilizing the charts proven on the following pages. You’ll find three elements to get selected, two hubs and one particular elastomer. Once the shaft dimension of the driver and driven of your application are in the same diameter, the hubs selected will likely be exactly the same. When shaft diameters vary, hubs picked will vary accordingly.
Details required just before a coupling can be chosen:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven equipment and corresponding keyways
Application description
Environmental problems (i.e. extreme temperature, corrosive circumstances, area limitations)
Techniques In Picking A Jaw Coupling
Step 1: Determine the Nominal Torque of your application by using the next formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Phase two: Making use of the Application Support Components Chart 1 select the service component which greatest corresponds to your application.
Stage 3: Calculate the Style and design Torque of one’s application by multiplying the Nominal Torque calculated in Step 1 by the Application Services Factor determined in Phase two.
Design Torque = Nominal Torque x Application Services Component
Step four: Using the Spider Effectiveness Information Chart 2, choose the elastomer material which best corresponds to your application.
Stage 5: Working with the Jaw Nominal Rated Torque Chart 3 , find the acceptable elastomer materials column for that elastomer picked in Step four.
Scan down this column on the to start with entry where the Torque Worth while in the ideal column is greater than or equal for the Style and design Torque calculated in Phase three.
As soon as this value is located, refer towards the corresponding coupling size within the first column from the Jaw Nominal Rated Torque Chart three .
Refer to the maximum RPM value for this elastomer torque capability to make sure that the application specifications are met. If your requirement is not really pleased at this point, an additional style of coupling might be necessary to the application. Please talk to Lovejoy engineering for assistance.
Stage 6: Review the application driver/driven shaft sizes for the greatest bore dimension obtainable on the coupling chosen. If coupling bore size isn’t substantial enough for your shaft diameter, choose the subsequent biggest coupling that will accommodate the driver/driven shaft diameters.
Stage seven: Working with the UPC amount assortment table , discover the proper Bore and Keyway sizes demanded and find the variety.