Approach
S-Flex Coupling Choice Procedure
The variety method for determining the right S-Flex coupling involves making use of the charts shown on the following pages. There are actually three parts to be chosen, two flanges and one particular sleeve.
Details necessary before a coupling might be chosen:
HP and RPM of Driver or operating torque
Shaft size of Driver and Driven tools and corresponding keyways
Application or tools description
Environmental disorders (i.e. intense temperature, corrosive disorders, room limitations)
Ways In Selecting An S-Flex Coupling
Step 1: Identify the Nominal Torque in in-lb of the application by using the following formula:
Nominal Torque = (HP x 63025)/RPM
Step 2: Working with the Application Service Element Chart one select the service component which greatest corresponds for your application.
Stage three: Determine the Design and style Torque of your application by multiplying the Nominal Torque calculated in Stage 1 by the Application Service Element established in Phase two.
Design Torque = Nominal Torque x Application Service Factor
Phase four: Employing the Sleeve Effectiveness Data Chart two decide on the sleeve material which greatest corresponds for your application.
Stage 5: Working with the S-Flex Nominal Rated Torque Chart 3 locate the acceptable sleeve material column to the sleeve chosen in Stage four.
Stage six: Scan down this column for the to start with entry wherever the Torque Value from the column is greater than or equal to the Style and design Torque calculated in Step three.
Refer on the maximum RPM worth of the coupling dimension to make certain that the application requirements are met. If your maximum RPM value is much less than the application necessity, S-Flex couplings are usually not proposed for that application.
Note:
If Nominal Torque is less than 1/4 in the coupling’s nominalrated torque, misalignment capacities are lowered by 1/2. After torque value is found, refer for the 
corresponding coupling dimension during the first column of your S-Flex Nominal Rated Torque Data Chart three .
Stage 7: Review the application driver/driven shaft sizes to your optimum bore dimension out there on the coupling selected. If coupling max bore will not be large adequate to the shaft diameter, select the next biggest coupling that should accommodate the driver/driven shaft diameters.
Stage eight: Making use of the Item Assortment tables, discover the acceptable Keyway and Bore dimension demanded and locate the variety.
