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February 22, 2021

Method
S-Flex Coupling Choice Procedure
The choice system for identifying the proper S-Flex coupling involves applying the charts proven around the following pages. You’ll find three components for being selected, two flanges and one particular sleeve.
Data essential prior to a coupling might be selected:
HP and RPM of Driver or running torque
Shaft dimension of Driver and Driven gear and corresponding keyways
Application or equipment description
Environmental situations (i.e. excessive temperature, corrosive disorders, area limitations)
Methods In Picking out An S-Flex Coupling
Stage one: Decide the Nominal Torque in in-lb of the application by using the following formula:
Nominal Torque = (HP x 63025)/RPM
Stage 2: Making use of the Application Service Issue Chart 1 pick the services issue which finest corresponds for your application.
Phase 3: Calculate the Layout Torque of the application by multiplying the Nominal Torque calculated in Phase 1 by the Application Support Component determined in Stage two.
Design Torque = Nominal Torque x Application Support Element
Stage 4: Making use of the Sleeve Efficiency Data Chart 2 choose the sleeve materials which very best corresponds to your application.
Stage 5: Making use of the S-Flex Nominal Rated Torque Chart 3 find the suitable sleeve materials column for that sleeve chosen in Step four.
Stage 6: Scan down this column on the initially entry in which the Torque Value within the column is greater than or equal on the Style and design Torque calculated in Step three.
Refer to the highest RPM value in the coupling dimension to make certain that the application specifications are met. In case the highest RPM value is significantly less compared to the application requirement, S-Flex couplings are usually not suggested to the application.
Note:
If Nominal Torque is much less than 1/4 of your coupling’s nominalrated torque, misalignment capacities are diminished by 1/2. Once torque worth is located, refer to your corresponding coupling size from the to start with column from the S-Flex Nominal Rated Torque Data Chart 3 .
Phase seven: Assess the application driver/driven shaft sizes on the greatest bore dimension obtainable about the coupling selected. If coupling max bore is just not big adequate to the shaft diameter, decide on the following largest coupling that may accommodate the driver/driven shaft diameters.
Step eight: Applying the Item Variety tables, find the ideal Keyway and Bore dimension demanded and locate the variety.