February 19, 2021

Jaw Type Coupling Assortment Process
The assortment system for figuring out the appropriate jaw coupling size and elastomer requires making use of the charts shown to the following pages. You will find 3 elements to become chosen, two hubs and one particular elastomer. When the shaft dimension in the driver and driven on the application are of the similar diameter, the hubs chosen is going to be exactly the same. When shaft diameters vary, hubs picked will vary accordingly.
Data essential just before a coupling could be chosen:
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. extreme temperature, corrosive circumstances, room limitations)
Steps In Selecting A Jaw Coupling
Stage 1: Decide the Nominal Torque of your application through the use of the following formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Phase two: Utilizing the Application Services Components Chart 1 choose the services element which very best corresponds for your application.
Phase three: Determine the Layout Torque of the application by multiplying the Nominal Torque calculated in Stage one from the Application Support Aspect established in Step 2.
Style Torque = Nominal Torque x Application Support Aspect
Phase four: Working with the Spider Effectiveness Information Chart 2, decide on the elastomer material which ideal corresponds for your application.
Phase five: Making use of the Jaw Nominal Rated Torque Chart 3 , find the ideal elastomer materials column to the elastomer selected in Step four.
Scan down this column for the very first entry in which the Torque Value while in the suitable column is higher than or equal for the Style and design Torque calculated in Stage 3.
After this value is found, refer towards the corresponding coupling dimension inside the first column of your Jaw Nominal Rated Torque Chart three .
Refer towards the greatest RPM worth for this elastomer torque capability to make certain the application prerequisites are met. In case the necessity isn’t happy at this time, a further kind of coupling can be required for that application. Please seek the advice of Lovejoy engineering for help.
Phase six: Examine the application driver/driven shaft sizes for the greatest bore dimension available to the coupling selected. If coupling bore size is not big adequate to the shaft diameter, select the next largest coupling that could accommodate the driver/driven shaft diameters.
Stage seven: Utilizing the UPC variety assortment table , locate the proper Bore and Keyway sizes needed and find the variety.