Process
S-Flex Coupling Selection Method
The selection process for figuring out the correct S-Flex coupling necessitates utilizing the charts proven to the following pages. You will find three elements to be chosen, two flanges and one sleeve.
Data vital just before a coupling is usually selected:
HP and RPM of Driver or running torque
Shaft size of Driver and Driven equipment and corresponding keyways
Application or tools description
Environmental circumstances (i.e. intense temperature, corrosive problems, area limitations)
Techniques In Selecting An S-Flex Coupling
Step 1: Decide the Nominal Torque in in-lb of the application by using the following formula:
Nominal Torque = (HP x 63025)/RPM
Step two: Employing the Application Service Aspect Chart one decide on the support aspect which very best corresponds to your application.
Step 3: Determine the Design Torque of your application by multiplying the Nominal Torque calculated in Stage 1 by the Application Services Aspect determined in Step two.
Design Torque = Nominal Torque x Application Support Issue
Stage 4: Employing the Sleeve Overall performance Data Chart 2 pick the sleeve material which very best corresponds to your application.
Step five: Working with the S-Flex Nominal Rated Torque Chart three find the ideal sleeve material column for that sleeve selected in Stage 4.
Step 6: Scan down this column for the very first entry wherever the Torque Worth from the column is better than or equal on the Design Torque calculated in Stage 3.
Refer on the greatest RPM worth in the coupling size to be sure the application demands are met. If your maximum RPM value is less compared to the application necessity, S-Flex couplings will not be advisable to the application.
Note:
If Nominal Torque is less than 1/4 from the coupling’s nominalrated torque, misalignment capacities are decreased by 1/2. The moment torque value is located, refer for the corresponding coupling dimension while in the very first column of your S-Flex Nominal Rated Torque Data Chart 3 .
Phase seven: Examine the application driver/driven 
shaft sizes to your highest bore size readily available over the coupling chosen. If coupling max bore is just not huge enough to the shaft diameter, select the next biggest coupling which will accommodate the driver/driven shaft diameters.
Stage 8: Making use of the Item Assortment tables, uncover the proper Keyway and Bore size expected and find the number.
