EP

February 19, 2021

Jaw Form Coupling Choice Method
The assortment process for figuring out the appropriate jaw coupling size and elastomer necessitates making use of the charts proven over the following pages. You will discover 3 elements to get picked, two hubs and 1 elastomer. Once the shaft size from the driver and driven from the application are in the very same diameter, the hubs picked will probably be exactly the same. When shaft diameters differ, hubs picked will vary accordingly.
Information required before a coupling can be chosen:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven tools and corresponding keyways
Application description
Environmental situations (i.e. extreme temperature, corrosive disorders, room limitations)
Ways In Selecting A Jaw Coupling
Phase one: Ascertain the Nominal Torque of one’s application through the use of the next formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Phase two: Using the Application Support Elements Chart one choose the service factor which most effective corresponds to your application.
Step three: Calculate the Style Torque of your application by multiplying the Nominal Torque calculated in Step one from the Application Service Element established in Phase two.
Style and design Torque = Nominal Torque x Application Support Issue
Step 4: Applying the Spider Effectiveness Data Chart 2, select the elastomer materials which best corresponds for your application.
Stage five: Working with the Jaw Nominal Rated Torque Chart three , locate the proper elastomer materials column to the elastomer picked in Phase 4.
Scan down this column on the first entry in which the Torque Worth from the proper column is greater than or equal towards the Style Torque calculated in Step 3.
Once this worth is located, refer on the corresponding coupling dimension during the initial column from the Jaw Nominal Rated Torque Chart 3 .
Refer to the highest RPM worth for this elastomer torque capability to be sure that the application requirements are met. When the necessity is not satisfied at this point, a different type of coupling could be required for that application. Please seek the advice of Lovejoy engineering for support.
Phase 6: Review the application driver/driven shaft sizes towards the maximum bore size offered on the coupling selected. If coupling bore size is just not huge ample for your shaft diameter, decide on the subsequent biggest coupling that could accommodate the driver/driven shaft diameters.
Step 7: Applying the UPC amount assortment table , discover the appropriate Bore and Keyway sizes expected and find the quantity.