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Screw Torque to Linear Force Calculator

Convert applied torque to axial force for screws and bolts. Essential for engineering and mechanical applications.

Linear Force Result:

Calculation Formula

The linear force (F) generated by screw torque is calculated using:

F = (2 × π × η × T) / (L + π × μ × d)

Where:

  • F = Linear force (N or lb)
  • T = Applied torque (Nm or lb-ft/lb-in)
  • η = Efficiency (0 to 1)
  • L = Thread lead (m or in)
  • μ = Friction coefficient
  • d = Screw diameter (m or in)

Frequently Asked Questions

What is screw torque to linear force conversion? +
Screw torque to linear force conversion calculates the axial force generated when torque is applied to a screw or bolt. This is essential for determining how much clamping force or linear motion can be achieved from rotational input.
How accurate is this calculator? +
The calculator provides theoretical values based on the input parameters. Actual results may vary due to material properties, lubrication, and manufacturing tolerances. For critical applications, always verify with physical testing.
What is a typical friction coefficient for screws? +
Typical friction coefficients range from 0.1 to 0.3 for lubricated screws and 0.2 to 0.5 for dry screws. The default value of 0.2 in the calculator represents a moderately lubricated condition.
Why is efficiency important in screw calculations? +
Efficiency accounts for energy losses due to friction and other factors. A perfect screw would have 100% efficiency (1.0), but real screws typically range from 30% to 95% efficiency depending on design and lubrication.

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