System
S-Flex Coupling Selection Method
The choice approach for determining the appropriate S-Flex coupling needs employing the charts shown around the following pages. You can find 3 elements to be selected, two flanges and one sleeve.
Information essential in advance of a coupling can be selected:
HP and RPM of Driver or operating torque
Shaft size of Driver and Driven products and corresponding keyways
Application or gear description
Environmental conditions (i.e. extreme temperature, corrosive disorders, area limitations)
Steps In Deciding on An S-Flex Coupling
Stage 1: Determine the Nominal Torque in in-lb of one’s application by using the following formula:
Nominal Torque = (HP x 63025)/RPM
Step 2: Employing the Application Service Factor Chart one decide on the services issue which most effective corresponds to your application.
Phase 3: Determine the Design Torque of one’s application by multiplying the Nominal Torque calculated in Step 1 by the Application Services Aspect established in Stage two.
Layout Torque = Nominal Torque x Application Support Component
Step 4: Working with the Sleeve Functionality Information Chart 2 decide on the sleeve materials which most effective corresponds to your application.
Stage five: Using the S-Flex Nominal Rated Torque Chart three find the proper sleeve material column for your sleeve chosen in Step 4.
Step six: Scan down this column towards the first entry exactly where the Torque Value inside the column is greater than or equal on the Style Torque calculated in Phase three.
Refer for the optimum RPM worth on the coupling size to be sure the application needs are met. In the event the maximum RPM worth is much less 
compared to the application requirement, S-Flex couplings usually are not recommended for your application.
Note:
If Nominal Torque is less than 1/4 from the coupling’s nominalrated torque, misalignment capacities are lowered by 1/2. When torque value is located, refer on the corresponding coupling dimension in the very first column of your S-Flex Nominal Rated Torque Data Chart 3 .
Step 7: Examine the application driver/driven shaft sizes to your maximum bore size obtainable around the coupling picked. If coupling max bore is not massive ample for your shaft diameter, select the subsequent biggest coupling that could accommodate the driver/driven shaft diameters.
Phase eight: Working with the Item Variety tables, locate the proper Keyway and Bore size necessary and locate the amount.
