February 19, 2021

Jaw Kind Coupling Choice Procedure
The assortment course of action for identifying the right jaw coupling dimension and elastomer needs making use of the charts shown on the following pages. You can find three elements for being picked, two hubs and a single elastomer. When the shaft dimension from the driver and driven of your application are with the identical diameter, the hubs picked might be precisely the same. When shaft diameters vary, hubs selected will vary accordingly.
Facts needed prior to a coupling is often 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. intense temperature, corrosive ailments, area limitations)
Methods In Selecting A Jaw Coupling
Phase one: 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
Phase 2: Making use of the Application Service Aspects Chart one decide on the service aspect which greatest corresponds for your application.
Stage 3: Calculate the Layout Torque of your application by multiplying the Nominal Torque calculated in Stage 1 by the Application Support Factor determined in Phase 2.
Layout Torque = Nominal Torque x Application Services Component
Stage four: Employing the Spider Effectiveness Data Chart 2, select the elastomer materials which greatest corresponds for your application.
Stage 5: Applying the Jaw Nominal Rated Torque Chart three , locate the ideal elastomer materials column for the elastomer chosen in Phase 4.
Scan down this column to your 1st entry where the Torque Worth inside the appropriate column is better than or equal to the Layout Torque calculated in Phase 3.
The moment this value is found, refer towards the corresponding coupling size while in the first column on the Jaw Nominal Rated Torque Chart 3 .
Refer towards the highest RPM worth for this elastomer torque capability to ensure the application needs are met. In case the necessity is not really happy at this point, another sort of coupling could possibly be expected to the application. Please consult Lovejoy engineering for assistance.
Stage 6: Examine the application driver/driven shaft sizes to your greatest bore size readily available over the coupling picked. If coupling bore size isn’t huge enough to the shaft diameter, decide on the subsequent biggest coupling which will accommodate the driver/driven shaft diameters.
Step seven: Utilizing the UPC quantity variety table , locate the appropriate Bore and Keyway sizes necessary and find the variety.