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February 19, 2021

Jaw Style Coupling Assortment Procedure
The variety procedure for determining the proper jaw coupling size and elastomer calls for working with the charts shown around the following pages. You’ll find 3 elements to be chosen, two hubs and a single elastomer. When the shaft size in the driver and driven from the application are with the similar diameter, the hubs picked are going to be the same. When shaft diameters vary, hubs chosen will vary accordingly.
Details needed just before a coupling is usually picked:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven equipment and corresponding keyways
Application description
Environmental disorders (i.e. intense temperature, corrosive problems, area limitations)
Actions In Picking out A Jaw Coupling
Phase 1: Ascertain the Nominal Torque of the application by using the following formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Phase 2: Working with the Application Services Factors Chart 1 choose the support issue which most effective corresponds for your application.
Phase 3: Determine the Style and design Torque of the application by multiplying the Nominal Torque calculated in Step 1 from the Application Service Element determined in Step two.
Style and design Torque = Nominal Torque x Application Service Element
Step 4: Applying the Spider Effectiveness Data Chart 2, choose the elastomer material which greatest corresponds for your application.
Phase 5: Using the Jaw Nominal Rated Torque Chart 3 , locate the suitable elastomer material column for that elastomer picked in Step four.
Scan down this column to your to start with entry where the Torque Value within the appropriate column is higher than or equal to your Layout Torque calculated in Stage 3.
Once this worth is located, refer towards the corresponding coupling size inside the first column in the Jaw Nominal Rated Torque Chart three .
Refer to your optimum RPM worth for this elastomer torque capability to be sure that the application necessities are met. When the necessity is not pleased at this point, an additional kind of coupling could possibly be needed to the application. Please seek the advice of Lovejoy engineering for help.
Phase six: Review the application driver/driven shaft sizes to the optimum bore dimension offered to the coupling selected. If coupling bore size will not be substantial sufficient for your shaft diameter, decide on the next greatest coupling that can accommodate the driver/driven shaft diameters.
Step 7: Utilizing the UPC quantity selection table , discover the suitable Bore and Keyway sizes expected and locate the number.