February 19, 2021

Jaw Variety Coupling Choice Procedure
The selection approach for figuring out the appropriate jaw coupling size and elastomer involves applying the charts proven on the following pages. There are three parts to get selected, two hubs and one elastomer. When the shaft dimension of your driver and driven in the application are with the same diameter, the hubs selected might be the identical. When shaft diameters vary, hubs chosen will vary accordingly.
Data required prior to a coupling could be picked:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven equipment and corresponding keyways
Application description
Environmental circumstances (i.e. severe temperature, corrosive problems, area limitations)
Measures In Picking out A Jaw Coupling
Step 1: Ascertain the Nominal Torque of one’s application by utilizing the next formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Stage two: Working with the Application Support Aspects Chart one choose the service issue which best corresponds to your application.
Stage 3: Determine the Style Torque of one’s application by multiplying the Nominal Torque calculated in Phase 1 from the Application Services Component established in Step two.
Design Torque = Nominal Torque x Application Support Component
Step 4: Working with the Spider Performance Information Chart 2, select the elastomer materials which greatest corresponds to your application.
Step five: Using the Jaw Nominal Rated Torque Chart 3 , locate the appropriate elastomer materials column for that elastomer picked in Phase four.
Scan down this column for the 1st entry the place the Torque Value while in the proper column is better than or equal to your Style and design Torque calculated in Phase 3.
When this value is located, refer on the corresponding coupling dimension within the initially column of your Jaw Nominal Rated Torque Chart 3 .
Refer to the highest RPM worth for this elastomer torque capability to make certain that the application prerequisites are met. If the requirement is not really happy at this time, yet another style of coupling might be expected for that application. Please talk to Lovejoy engineering for assistance.
Phase 6: Review the application driver/driven shaft sizes to the optimum bore size obtainable to the coupling selected. If coupling bore size isn’t huge ample for that shaft diameter, choose the following greatest coupling that will accommodate the driver/driven shaft diameters.
Stage seven: Making use of the UPC number assortment table , obtain the ideal Bore and Keyway sizes required and find the variety.