February 19, 2021

Jaw Kind Coupling Choice Process
The selection course of action for figuring out the proper jaw coupling dimension and elastomer involves using the charts proven on the following pages. You will discover 3 components to be selected, two hubs and one particular elastomer. When the shaft size on the driver and driven of the application are on the very same diameter, the hubs chosen might be the exact same. When shaft diameters differ, hubs chosen will vary accordingly.
Facts vital in advance of 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 situations (i.e. excessive temperature, corrosive ailments, area limitations)
Steps In Choosing A Jaw Coupling
Step 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: Applying the Application Service Elements Chart 1 select the support component which finest corresponds for your application.
Step 3: Determine the Design Torque of your application by multiplying the Nominal Torque calculated in Stage one by the Application Services Factor established in Stage two.
Style and design Torque = Nominal Torque x Application Services Component
Step 4: Using the Spider Functionality Data Chart 2, choose the elastomer material which ideal corresponds for your application.
Phase 5: Applying the Jaw Nominal Rated Torque Chart three , find the ideal elastomer material column for your elastomer picked in Stage four.
Scan down this column towards the initial entry the place the Torque Worth inside the acceptable column is better than or equal to the Style and design Torque calculated in Stage three.
After this worth is found, refer to the corresponding coupling size inside the first column from the Jaw Nominal Rated Torque Chart 3 .
Refer for the highest RPM worth for this elastomer torque capability to make certain the application specifications are met. If the necessity just isn’t pleased at this time, yet another form of coupling may very well be expected for your application. Please check with Lovejoy engineering for assistance.
Step six: Review the application driver/driven shaft sizes to the highest bore size offered on the coupling chosen. If coupling bore dimension just isn’t massive adequate for that shaft diameter, pick the next greatest coupling that should accommodate the driver/driven shaft diameters.
Step seven: Utilizing the UPC quantity assortment table , obtain the ideal Bore and Keyway sizes required and find the quantity.