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February 19, 2021

Jaw Form Coupling Assortment System
The choice course of action for identifying the proper jaw coupling dimension and elastomer necessitates working with the charts shown over the following pages. You’ll find three components to get selected, two hubs and one elastomer. Once the shaft size from the driver and driven of your application are of your very same diameter, the hubs picked will probably be the identical. When shaft diameters vary, hubs selected will vary accordingly.
Info needed in advance of a coupling may be picked:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven products and corresponding keyways
Application description
Environmental ailments (i.e. extreme temperature, corrosive conditions, area limitations)
Actions In Picking A Jaw Coupling
Stage 1: Ascertain the Nominal Torque of your application by using the following formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Stage two: Using the Application Support Aspects Chart one choose the services issue which most effective corresponds for your application.
Step 3: Calculate the Style Torque of your application by multiplying the Nominal Torque calculated in Step one by the Application Services Factor established in Step 2.
Style Torque = Nominal Torque x Application Service Element
Step four: Making use of the Spider Overall performance Data Chart 2, pick the elastomer material which best corresponds to your application.
Stage 5: Utilizing the Jaw Nominal Rated Torque Chart 3 , find the suitable elastomer materials column for that elastomer selected in Phase 4.
Scan down this column to your first entry in which the Torque Value within the appropriate column is higher than or equal for the Style and design Torque calculated in Step three.
The moment this worth is located, refer to the corresponding coupling size from the initially column of the Jaw Nominal Rated Torque Chart 3 .
Refer to the highest RPM worth for this elastomer torque capability to make sure the application requirements are met. Should the necessity just isn’t pleased at this time, one more form of coupling might be needed for your application. Please talk to Lovejoy engineering for assistance.
Step 6: Examine the application driver/driven shaft sizes for the optimum bore dimension accessible on the coupling picked. If coupling bore size just isn’t significant sufficient for your shaft diameter, pick the subsequent biggest coupling that may accommodate the driver/driven shaft diameters.
Stage 7: Employing the UPC number selection table , uncover the suitable Bore and Keyway sizes essential and locate the quantity.