February 22, 2021

S-Flex Coupling Choice Method
The assortment system for determining the right S-Flex coupling demands working with the charts shown to the following pages. You will discover three elements to be picked, two flanges and a single sleeve.
Facts needed ahead of a coupling could be selected:
HP and RPM of Driver or operating torque
Shaft size of Driver and Driven tools and corresponding keyways
Application or gear description
Environmental problems (i.e. severe temperature, corrosive ailments, area limitations)
Steps In Picking An S-Flex Coupling
Step one: Ascertain the Nominal Torque in in-lb of one’s application through the use of the following formula:
Nominal Torque = (HP x 63025)/RPM
Phase two: Applying the Application Service Issue Chart one choose the service issue which very best corresponds to your application.
Phase 3: Determine the Style Torque of one’s application by multiplying the Nominal Torque calculated in Phase one through the Application Services Component established in Step two.
Style Torque = Nominal Torque x Application Service Aspect
Stage four: Working with the Sleeve Overall performance Data Chart 2 pick the sleeve materials which best corresponds to your application.
Phase 5: Employing the S-Flex Nominal Rated Torque Chart 3 locate the ideal sleeve materials column for that sleeve picked in Step four.
Stage six: Scan down this column towards the 1st entry in which the Torque Worth during the column is greater than or equal to your Style Torque calculated in Stage 3.
Refer to the greatest RPM worth from the coupling dimension to guarantee that the application needs are met. If your maximum RPM worth is much less than the application requirement, S-Flex couplings usually are not recommended to the application.
If Nominal Torque is significantly less than 1/4 with the coupling’s nominalrated torque, misalignment capacities are diminished by 1/2. As soon as torque worth is located, refer to your corresponding coupling size within the 1st column of the S-Flex Nominal Rated Torque Information Chart 3 .
Step seven: Review the application driver/driven shaft sizes to the highest bore size obtainable over the coupling picked. If coupling max bore just isn’t huge enough for your shaft diameter, pick the subsequent biggest coupling that will accommodate the driver/driven shaft diameters.
Step 8: Utilizing the Item Choice tables, come across the ideal Keyway and Bore size expected and find the variety.