February 19, 2021

Jaw Variety Coupling Variety System
The selection system for figuring out the correct jaw coupling size and elastomer needs employing the charts shown within the following pages. You can find 3 elements to become chosen, two hubs and 1 elastomer. Once the shaft size with the driver and driven in the application are of your similar diameter, the hubs chosen will likely be precisely the same. When shaft diameters vary, hubs chosen will vary accordingly.
Information and facts needed just before a coupling may be selected:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven products and corresponding keyways
Application description
Environmental disorders (i.e. extreme temperature, corrosive ailments, space limitations)
Techniques In Selecting A Jaw Coupling
Stage one: Establish 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
Phase 2: Working with the Application Service Factors Chart 1 choose the services issue which best corresponds to your application.
Step three: Calculate the Style and design Torque of your application by multiplying the Nominal Torque calculated in Phase one by the Application Services Aspect established in Phase two.
Layout Torque = Nominal Torque x Application Support Element
Stage four: Using the Spider Functionality Data Chart 2, pick the elastomer materials which finest corresponds for your application.
Step five: Utilizing the Jaw Nominal Rated Torque Chart three , find the acceptable elastomer material column for that elastomer picked in Phase 4.
Scan down this column to your to start with entry in which the Torque Value during the suitable column is higher than or equal to your Design and style Torque calculated in Phase three.
When this value is found, refer to your corresponding coupling dimension in the to start with column in the Jaw Nominal Rated Torque Chart three .
Refer towards the optimum RPM value for this elastomer torque capability to make certain the application prerequisites are met. In the event the requirement is just not pleased at this time, an additional form of coupling may very well be needed to the application. Please seek advice from Lovejoy engineering for assistance.
Phase 6: Compare the application driver/driven shaft sizes to the maximum bore dimension readily available over the coupling chosen. If coupling bore dimension will not be large enough for the shaft diameter, decide on the following greatest coupling that may accommodate the driver/driven shaft diameters.
Step seven: Using the UPC quantity assortment table , find the suitable Bore and Keyway sizes necessary and find the number.