February 19, 2021

Jaw Style Coupling Variety System
The variety course of action for determining the right jaw coupling dimension and elastomer involves using the charts shown about the following pages. There are actually three components to be chosen, two hubs and a single elastomer. When the shaft size from the driver and driven in the application are of your very same diameter, the hubs selected will likely be the exact same. When shaft diameters differ, hubs chosen will vary accordingly.
Details necessary before a coupling may be selected:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven gear and corresponding keyways
Application description
Environmental ailments (i.e. excessive temperature, corrosive disorders, area limitations)
Techniques In Picking out A Jaw Coupling
Step 1: Figure out the Nominal Torque of your application by utilizing the next formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Phase 2: Using the Application Service Aspects Chart 1 select the services aspect which best corresponds to your application.
Phase three: Calculate the Design and style Torque of the application by multiplying the Nominal Torque calculated in Step one by the Application Services Factor established in Step 2.
Design Torque = Nominal Torque x Application Services Factor
Stage 4: Making use of the Spider Efficiency Information Chart 2, pick the elastomer material which greatest corresponds to your application.
Stage five: Using the Jaw Nominal Rated Torque Chart 3 , find the acceptable elastomer material column for your elastomer picked in Phase four.
Scan down this column towards the initial entry exactly where the Torque Value within the appropriate column is greater than or equal towards the Layout Torque calculated in Step 3.
When this value is located, refer to the corresponding coupling dimension within the initially column with the Jaw Nominal Rated Torque Chart 3 .
Refer to the highest RPM value for this elastomer torque capability to ensure that the application demands are met. When the requirement is not satisfied at this time, a different variety of coupling could possibly be demanded to the application. Please talk to Lovejoy engineering for assistance.
Stage 6: Evaluate the application driver/driven shaft sizes to the highest bore size out there about the coupling picked. If coupling bore dimension will not be large sufficient for your shaft diameter, decide on the subsequent largest coupling that can accommodate the driver/driven shaft diameters.
Step seven: Applying the UPC amount variety table , find the suitable Bore and Keyway sizes required and find the amount.