Jaw Variety Coupling Choice Process
The assortment procedure for determining the appropriate jaw coupling size and elastomer needs using the charts shown to the following pages. You will discover three elements to get selected, two hubs and a single elastomer. When the shaft dimension of the driver and driven from the application are of the same diameter, the hubs picked will probably be exactly the same. When shaft diameters vary, hubs chosen will vary accordingly.
Data needed in advance of a coupling can 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. excessive temperature, corrosive circumstances, room limitations)
Measures In Deciding on A Jaw Coupling
Stage 1: Identify the Nominal Torque of your application through the use of the following formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Step 2: Utilizing the Application Services Factors Chart one select the support aspect which most effective corresponds to your application.
Step 3: Calculate the Layout Torque of your application by multiplying the Nominal Torque calculated in Phase one from the Application Service Issue determined in Step two.
Layout Torque = Nominal Torque x Application Services Aspect
Step four: Making use of the Spider Effectiveness Data Chart 2, choose the elastomer materials which very best corresponds to your application.
Step five: Making use of the Jaw Nominal Rated Torque Chart 3 , locate the proper elastomer materials column for that elastomer chosen in Phase four.
Scan down this column to your first entry where the Torque Value during the ideal column is greater than or equal towards the Design Torque calculated in Phase 3.
When this worth is located, refer to the corresponding coupling dimension inside the 1st column on the Jaw Nominal Rated Torque Chart three .
Refer on the optimum RPM value for this elastomer torque capability to make certain that the application specifications are met. When the necessity is just not pleased at this time, another kind of coupling may be demanded to the application. Please seek advice from Lovejoy engineering for support.
Stage six: Review the application driver/driven shaft sizes to the optimum bore dimension obtainable around the coupling picked. If coupling bore size is not substantial sufficient to the shaft diameter, choose the following greatest coupling that can accommodate the driver/driven shaft diameters.
Phase seven: Applying the UPC variety choice table , come across the appropriate Bore and Keyway sizes required and find the number.