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February 19, 2021

Jaw Type Coupling Variety Procedure
The variety procedure for figuring out the appropriate jaw coupling size and elastomer calls for making use of the charts proven to the following pages. You will find 3 components to get picked, two hubs and one elastomer. When the shaft dimension of the driver and driven of your application are of the identical diameter, the hubs chosen are going to be the same. When shaft diameters vary, hubs selected will differ accordingly.
Info necessary ahead of a coupling is usually picked:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven products and corresponding keyways
Application description
Environmental disorders (i.e. intense temperature, corrosive problems, area limitations)
Actions In Picking A Jaw Coupling
Stage one: Identify 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
Stage 2: Using the Application Support Components Chart 1 pick the support factor which best corresponds for your application.
Phase 3: Calculate the Style and design Torque of your application by multiplying the Nominal Torque calculated in Stage one by the Application Support Aspect established in Step two.
Style and design Torque = Nominal Torque x Application Support Factor
Phase 4: Applying the Spider Performance Data Chart 2, select the elastomer material which finest corresponds to your application.
Step 5: Making use of the Jaw Nominal Rated Torque Chart three , find the suitable elastomer material column for that elastomer selected in Stage four.
Scan down this column towards the first entry wherever the Torque Worth during the ideal column is better than or equal to your Style and design Torque calculated in Step three.
After this value is found, refer to your corresponding coupling dimension within the to start with column in the Jaw Nominal Rated Torque Chart 3 .
Refer to the greatest RPM value for this elastomer torque capability to ensure the application requirements are met. When the necessity is not really pleased at this time, an additional sort of coupling could possibly be needed to the application. Please consult Lovejoy engineering for help.
Phase 6: Review the application driver/driven shaft sizes to your greatest bore size available about the coupling selected. If coupling bore size is just not huge adequate for the shaft diameter, select the following biggest coupling that could accommodate the driver/driven shaft diameters.
Step seven: Making use of the UPC amount choice table , locate the acceptable Bore and Keyway sizes demanded and find the quantity.