February 22, 2021

S-Flex Coupling Choice Process
The variety system for identifying the correct S-Flex coupling requires using the charts proven on the following pages. You will find three elements to be selected, two flanges and one sleeve.
Facts essential ahead of a coupling is often selected:
HP and RPM of Driver or working torque
Shaft size of Driver and Driven products and corresponding keyways
Application or equipment description
Environmental problems (i.e. extreme temperature, corrosive circumstances, space limitations)
Methods In Picking An S-Flex Coupling
Phase 1: Ascertain the Nominal Torque in in-lb of one’s application by utilizing the following formula:
Nominal Torque = (HP x 63025)/RPM
Phase 2: Making use of the Application Support Element Chart one select the service issue which finest corresponds to your application.
Phase three: Determine the Layout Torque of one’s application by multiplying the Nominal Torque calculated in Stage one from the Application Services Factor determined in Stage two.
Design Torque = Nominal Torque x Application Service Element
Stage four: Making use of the Sleeve Effectiveness Data Chart 2 decide on the sleeve material which greatest corresponds for your application.
Stage 5: Working with the S-Flex Nominal Rated Torque Chart three locate the acceptable sleeve material column for the sleeve chosen in Phase 4.
Stage six: Scan down this column for the first entry exactly where the Torque Worth inside the column is higher than or equal for the Style and design Torque calculated in Stage three.
Refer on the greatest RPM worth of your coupling size to make certain the application prerequisites are met. Should the maximum RPM worth is much less compared to the application requirement, S-Flex couplings will not be encouraged for the application.
If Nominal Torque is less than 1/4 of the coupling’s nominalrated torque, misalignment capacities are lowered by 1/2. After torque worth is found, refer on the corresponding coupling size while in the 1st column of your S-Flex Nominal Rated Torque Data Chart 3 .
Phase seven: Assess the application driver/driven shaft sizes for the greatest bore dimension available on the coupling picked. If coupling max bore is just not significant adequate to the shaft diameter, decide on the next greatest coupling that could accommodate the driver/driven shaft diameters.
Stage 8: Applying the Item Selection tables, locate the ideal Keyway and Bore size demanded and locate the amount.