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Screw Torque To Linear Force Equation:
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The Screw Torque to Linear Force equation calculates the linear force generated by a screw mechanism based on the applied torque, lead of the screw, and system efficiency. It is commonly used in mechanical engineering for screw jacks, linear actuators, and other mechanical systems.
The calculator uses the Screw Torque to Linear Force equation:
Where:
Explanation: The equation converts rotational torque into linear force, accounting for the mechanical advantage of the screw thread and system efficiency losses.
Details: Accurate force calculation is essential for designing mechanical systems, selecting appropriate components, and ensuring system safety and performance under load.
Tips: Enter torque in Nm, lead in meters, and efficiency as a decimal between 0 and 1. All values must be valid (torque > 0, lead > 0, 0 < efficiency ≤ 1).
Q1: What is screw lead?
A: Screw lead is the linear distance the screw travels in one complete revolution (360° rotation).
Q2: How is efficiency determined?
A: Efficiency depends on factors like thread design, material, lubrication, and bearing friction. Typical values range from 0.3 to 0.9.
Q3: Can this be used for ball screws and acme screws?
A: Yes, but efficiency values differ significantly. Ball screws typically have higher efficiency (0.8-0.9) than acme screws (0.3-0.5).
Q4: What are typical torque values?
A: Torque values vary widely based on application, from small precision screws requiring fractions of Nm to large industrial screws requiring hundreds of Nm.
Q5: How does thread pitch relate to lead?
A: For single-start threads, lead equals pitch. For multi-start threads, lead equals pitch multiplied by the number of starts.