Sets parameters for calculation of a power screw.
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Access: |
Ribbon:
Design tab
Power Transmission panel
Power Screw Calculator
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Type of Strength Calculation |
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Screw Diameter Design |
Calculates the screw diameter according to the specified load, geometric dimensions, material properties, and safety coefficient. |
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Material Design |
Designs the minimum material values for the specified load, length, and properties. |
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Check Calculation |
Performs the stress check in the screw, and checks allowable pressure in its threads. |
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Loads |
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Specifies force, moment, and thread friction coefficient. |
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Max. Axial Force |
Sets the value of maximum operating force carried by the screw. |
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Max.Torque |
Sets the value of maximum operating torque. |
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Thread Friction Factor |
Sets the friction coefficient in the thread between the nut and the screw. Values are presented in the table in the Engineer's Handbook. |
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Screw |
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Specifies or calculates screw diameter, nut height, factor for end conditions, and maximum length of loaded screw. |
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Thread Diameter, Pitch, and Mean Screw Diameter |
Sets geometric screw dimensions. |
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Min. Screw Diameter |
Sets the smallest screw diameter, usually the thread small diameter. |
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Nut Height |
Specifies the active nut (thread) height. |
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Factor for End Conditions |
Sets the coefficient according to the diagram of mounting types. See the chapter in the Engineer's Handbook. |
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Max. Length |
Specifies the maximum loaded length of the power screw. |
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Material |
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Specifies screw properties. Check the check box to open Material Database and select a material. Edit the properties of the material, if needed. |
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Allowable Thread Pressure |
Sets the allowable thread pressure in the nut. Click the arrow to show appropriate values in the Allowable Thread Pressure table. |
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Elasticity Module |
Selects the material, such as steel, aluminum, or a custom value. |
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Yield Strength |
Sets the yield strength of the screw. |
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Safety Factor |
Sets the required safety level, usually from 2 through 10. |
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Type of transmission |
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Rotation |
Transform rotation to shift. |
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Shift |
Transform shift to rotation. |
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Results |
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Displays the calculated and limit stresses in the screw and pressure in the thread. |
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Summary of Messages area |
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Displays the reports about calculation. To open the Summary of Messages at the bottom of the Calculation tab, double-click the double line at the bottom or click the chevron. |