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THE FEUTEX TOOLKIT

Square Thread Power Screw

Estimate raising torque, lead angle and ideal thread efficiency.

Mechanical workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaT=Wdm/2·(µ+tanλ)/(1−µtanλ); η=tanλ(1−µtanλ)/(µ+tanλ).
Sources and model references

Worked example

Inputs

Axial load
10000 N
Mean thread diameter
0.02 m
Lead per turn
0.004 m
Thread friction coefficient
0.15

Expected results

Lead angle
3.642646888 degrees
Raising torque excluding collar
21.57219703 N·m
Thread efficiency
0.2951112357

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter every input in the labeled units; use measured or independently specified properties.
  2. Check the stated model assumptions before calculating.
  3. Interpret the output as a model estimate and verify it independently for the intended application.

Try this example

{
  "load": 10000,
  "diameter": 0.02,
  "lead": 0.004,
  "mu": 0.15
}

Accuracy and scope

Square-thread idealization; no collar friction, screw buckling, wear or self-locking certification. Educational engineering estimate only; not structural or safety certification, equipment selection, or operating recommendations.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.