February 19, 2021

Jaw Style Coupling Selection Method
The assortment process for identifying the right jaw coupling size and elastomer needs making use of the charts proven about the following pages. There are actually 3 parts to become picked, two hubs and one particular elastomer. Once the shaft size from the driver and driven on the application are of the identical diameter, the hubs chosen will probably be the identical. When shaft diameters vary, hubs selected will vary accordingly.
Info required in advance of a coupling is often chosen:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven gear and corresponding keyways
Application description
Environmental conditions (i.e. intense temperature, corrosive problems, room limitations)
Methods In Selecting A Jaw Coupling
Step 1: Figure out the Nominal Torque of one’s application through the use of the next formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Step two: Applying the Application Support Elements Chart 1 choose the service issue which most effective corresponds for your application.
Stage 3: Calculate the Design and style Torque of your application by multiplying the Nominal Torque calculated in Step 1 from the Application Service Aspect established in Phase 2.
Design and style Torque = Nominal Torque x Application Support Aspect
Phase 4: Working with the Spider Performance Information Chart 2, select the elastomer material which very best corresponds for your application.
Step five: Making use of the Jaw Nominal Rated Torque Chart three , find the proper elastomer materials column for the elastomer chosen in Stage four.
Scan down this column on the initial entry where the Torque Worth from the suitable column is higher than or equal to your Design Torque calculated in Phase 3.
As soon as this value is located, refer for the corresponding coupling size within the very first column with the Jaw Nominal Rated Torque Chart 3 .
Refer towards the highest RPM value for this elastomer torque capability to make sure that the application necessities are met. When the necessity will not be happy at this point, one more sort of coupling might be essential to the application. Please seek advice from Lovejoy engineering for help.
Step 6: Assess the application driver/driven shaft sizes to your maximum bore dimension available about the coupling selected. If coupling bore size is just not huge sufficient for the shaft diameter, pick the following greatest coupling that could accommodate the driver/driven shaft diameters.
Phase seven: Applying the UPC number choice table , locate the ideal Bore and Keyway sizes demanded and locate the amount.