Jaw Sort Coupling Choice Process
The choice procedure for determining the correct jaw coupling dimension and elastomer demands utilizing the charts proven to the following pages. You will find 3 parts to be picked, two hubs and one elastomer. Once the shaft dimension in the driver and driven from the application are from the same diameter, the hubs chosen will likely be precisely the same. When shaft diameters differ, hubs picked will vary accordingly.
Facts vital before a coupling may be picked:
HP (or KW) and RPM or Torque of driver
Shaft sizes of driver and driven tools and corresponding keyways
Application description
Environmental disorders (i.e. extreme temperature, corrosive disorders, area limitations)
Ways In Choosing A Jaw Coupling
Stage one: Identify the Nominal Torque of the application by using the following formula:
Nominal Torque = in-lb = (HP x 63025)/RPM
Nm = (KW x 9550)/RPM
Stage 2: Employing the Application Service Factors Chart 1 decide on the service factor which greatest corresponds to your application.
Stage 3: Determine the Design Torque of the application by multiplying the Nominal Torque calculated in Stage 1 from the Application Support Aspect determined in Stage two.
Style Torque = Nominal Torque x Application Services Aspect
Step four: Applying the Spider Effectiveness Data Chart 2, select the elastomer material which very best corresponds to your application.
Phase 5: Making use of the Jaw Nominal Rated Torque Chart 3 , find the acceptable elastomer material column to the elastomer picked in Phase four.
Scan down this column to your initial entry the place the Torque Value from the ideal column is higher than or equal towards the Style and design Torque calculated in Phase three.
The moment this value is located, refer to your corresponding coupling dimension from the initially column with the Jaw Nominal Rated Torque Chart three .
Refer towards the optimum RPM worth for this elastomer torque capability to ensure that the application needs are met. If your necessity will not be pleased at this point, yet another kind of coupling may very well be essential to the application. Please consult Lovejoy engineering for help.
Phase six: Review the application driver/driven shaft sizes for the greatest bore size accessible over the coupling selected. If coupling bore size will not be big ample for the shaft diameter, pick the next biggest coupling that could accommodate the driver/driven shaft diameters.
Phase 7: Working with the UPC number assortment table , find the appropriate Bore and Keyway sizes required and locate the amount.