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February 19, 2021

Jaw Type Coupling Variety Procedure
The assortment procedure for figuring out the correct jaw coupling size and elastomer involves utilizing the charts proven about the following pages. You’ll find three elements to become selected, two hubs and a single elastomer. Once the shaft size in the driver and driven from the application are of your identical diameter, the hubs picked will be exactly the same. When shaft diameters differ, hubs chosen will differ accordingly.
Information needed just before a coupling could be selected:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven tools and corresponding keyways
Application description
Environmental problems (i.e. extreme temperature, corrosive situations, room limitations)
Steps In Picking out A Jaw Coupling
Step 1: Establish the Nominal Torque of the application through the use of the following formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Step 2: Working with the Application Service Aspects Chart one select the service component which greatest corresponds for your application.
Phase three: Determine the Design and style Torque of your application by multiplying the Nominal Torque calculated in Stage 1 by the Application Service Element established in Phase two.
Design Torque = Nominal Torque x Application Service Factor
Phase four: Employing the Spider Effectiveness Information Chart 2, pick the elastomer materials which best corresponds to your application.
Phase 5: Utilizing the Jaw Nominal Rated Torque Chart three , locate the appropriate elastomer materials column for your elastomer picked in Stage 4.
Scan down this column to your very first entry the place the Torque Worth during the ideal column is greater than or equal on the Style Torque calculated in Step three.
As soon as this worth is found, refer towards the corresponding coupling dimension within the 1st column on the Jaw Nominal Rated Torque Chart 3 .
Refer to the greatest RPM value for this elastomer torque capability to make sure that the application specifications are met. If your necessity is not really content at this point, one more form of coupling can be necessary to the application. Please seek advice from Lovejoy engineering for support.
Phase 6: Review the application driver/driven shaft sizes towards the highest bore size accessible over the coupling picked. If coupling bore size is not really significant enough for the shaft diameter, decide on the next biggest coupling that may accommodate the driver/driven shaft diameters.
Step 7: Making use of the UPC number choice table , obtain the proper Bore and Keyway sizes expected and locate the variety.