Jaw Coupling Selection Procedure

Jaw Type Coupling Assortment Method
The assortment approach for determining the proper jaw coupling dimension and elastomer needs utilizing the charts shown around the following pages. You’ll find three components to get chosen, two hubs and one elastomer. Once the shaft dimension of the driver and driven with the application are of the similar diameter, the hubs picked will likely be the same. When shaft diameters differ, hubs picked will differ accordingly.
Info important before a coupling might be picked:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven tools and corresponding keyways
Application description
Environmental disorders (i.e. excessive temperature, corrosive circumstances, area limitations)
Methods In Picking out A Jaw Coupling
Step one: Decide the Nominal Torque of the application by using the next formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Phase two: Employing the Application Service Aspects Chart 1 choose the services factor which best corresponds to your application.
Phase 3: Determine the Style Torque of one’s application by multiplying the Nominal Torque calculated in Stage 1 through the Application Service Component established in Step 2.
Layout Torque = Nominal Torque x Application Service Aspect
Stage four: Utilizing the Spider Efficiency Data Chart 2, decide on the elastomer material which most effective corresponds for your application.
Stage 5: Making use of the Jaw Nominal Rated Torque Chart 3 , locate the acceptable elastomer material column for your elastomer selected in Stage four.
Scan down this column to the very first entry wherever the Torque Worth from the ideal column is greater than or equal for the Style and design Torque calculated in Phase three.
As soon as this value is found, refer to your corresponding coupling size during the to start with column of the Jaw Nominal Rated Torque Chart three .
Refer for the highest RPM worth for this elastomer torque capability to be sure the application specifications are met. In the event the requirement is not happy at this point, one more style of coupling can be essential for the application. Please seek the advice of Lovejoy engineering for assistance.
Phase six: Assess the application driver/driven shaft sizes to the highest bore dimension out there over the coupling chosen. If coupling bore dimension isn’t big ample for that shaft diameter, select the subsequent largest coupling that could accommodate the driver/driven shaft diameters.
Step seven: Using the UPC amount variety table , uncover the ideal Bore and Keyway sizes essential and locate the variety.


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