Involute Splines Generator dialog box - Calculation tab

This tab extends the Design tab. Calculates generator data based on selections in the Design tab.

Access:

Ribbon: Design tab Power Transmission panel Involute Splines and click the Calculation tab.

Strength Calculation

Method
ANSI Method	Performs calculation according to the ANSI standards.
	Note: This method is available only if you select ANSI spline in the Design tab.
Common Method	Performs calculation according to the basic formula when pressure equals force on plane.
Metric Method	Performs calculation based on CSN 014950 standard.
Type
Check Calculation	Performs a strength check for the specified load, dimensions, and joint properties.
Length Design	Designs the optimum active spline length for the specified load, spline diameter, and joint properties.

Loads

Loading is entered through power, speed, or torque, depending on the method selected.
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

Spline	Choose a dimension of the spline.
Hollow Shaft Inner Diameter	If you use a hollow shaft in the coupling, enter the inner diameter of the shaft here. This parameter effects the size of loading of the shaft in torsion and considerably affects determination of the minimum permitted diameter of the shaft.
Hub Outside Diameter	Choose the outside diameter of the hub.
Spline Length	Choose 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 and exact following 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 in cases of couplings working in a corrosive environment or at high temperatures.

Shaft Material

In the material edit field, specify your own material values or select a material from Material Database. If a material is selected from Material Database, its value is inserted into the following edit field, and the edit field is locked. To unlock the field, clear the check box.
Allowable Pressure	Enter 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	Enter 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.
Allowable Compressive Stress	Available only if you select the ANSI spline in the Design tab.

Hub Material

In the material edit field, specify your own material values or select a material from Material Database. If a material is selected from Material Database, its value is inserted into the following edit field, and the edit field is locked. To unlock the field, clear the check box.
Allowable Pressure	Enter 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	Enter 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.
Allowable Compressive Stress	Available only if you select the ANSI spline in the Design tab.
Allowable Tensile Stress	Available only if you select the ANSI spline in the Design tab.

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 calculations. 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.

Design Tab

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