This tab extends the Design tab. Calculates generator data based on selections on the Design tab.
- Access
- Ribbon: Design tab
Power Transmission panel Parallel Splines 
and click the Calculation tab.
Strength Calculation
- Check Calculation
- Performs a strength check for the specified load, dimensions, and joint properties.
- Length Design
- Designs optimum active spline length for the specified load, spline diameter, and joint properties.
- Diameter Design
- Designs optimum spline dimensions for the specified load, spline, length, and properties of the joint from the selected spline range.
Loads
Loading is entered through power, speed, or torque according to the selected method in the selection list.
- Power, Torque Speed
- Calculates the speed according to the power and torque.
- Torque, Speed Power
- Calculates the power according to the torque and speed.
- Power, Speed Torque
- Calculates the torque according to the power and speed.
Dimensions
- Hollow Shaft Inner Diameter
- If you use a hollow shaft in the coupling, enter the inner diameter of the shaft. This parameter effects the size of loading of the shaft in torsion and the termination of the minimum permitted diameter of the shaft
- Spline Length
- Specifies a length of spline within the standard specified range so that it is larger than the minimum length.
Joint Properties
- Desired Safety
- With regards to accuracy and credibility of input information, importance of the coupling, quality of production and accuracy of the calculation, it is chosen in a range from 1.5 to 3. Orientation values for choice of safety:
- 1.3 to 1.5 - Very accurate input information, perfect knowledge of material characteristics, high quality of production technology, insignificant couplings, damage to which does not cause any serious consequences.
- 1.5 to 1.8 - Less accurate calculation without any experimental verification, lower accuracy in production technology, couplings of lower importance.
- 1.8 to 2.5 - Decreased accuracy of calculations, approximate determination of material characteristics, inaccurate knowledge of actual effects of external loading; large diameters of shafts, important couplings, damage to which could jeopardize human life or bring about high material losses. Note: Even higher levels of safety are used if of couplings are working in a corrosive environment or at high temperatures.
Shaft Material
Specifies material values you enter or material you select from the Material Database. If a material is selected from the Material Database, its value is inserted automatically, and the edit field is locked. To unlock the field, clear the check box.
- Allowable Pressure
- Enters the allowable pressure of the spline material with the least quality in the Joint Properties group. The spline is checked for pressure during the strength check.
- Allowable Shear Stress
- Enters the allowable pressure of the spline material with the least quality in the Joint Properties group. This value is used in designing the minimum shaft diameter
Hub Material
Specifies material values you enter or material you select from the Material Database. If a material is selected from the Material Database, its value is inserted automatically, and the edit field is locked. To unlock the field, clear the check box.
- Allowable Pressure
- Enters the allowable pressure of the spline material with the least quality in the Joint Properties group. The spline is checked for pressure during the strength check.
Results
To display the Results area on the right side of the Calculation and Design tabs, double-click the double line on the right or click the chevron.
The area displays the calculated values and the key strength check. Values are calculated when you click Calculate.
The units of the results values can be changed. Double-click the specified value you want to change.
Summary of Messages
Displays the reports about calculation. To open the Summary of Messages area at the bottom of the Calculation and Design tabs, double-click the double line at the bottom of tabs or click the chevron.