How accurate are these calculations?

Formulas adhere strictly to industry engineering and trade handbook standards. Always allow safety margins for critical real-world installations.

Does this tool transmit any personal or project data?

No. All calculations run strictly client-side inside your browser. No data ever leaves your computer.

What does the Screw Jack & Lead Screw Torque Calculator give me?

It works out Raising / Lifting Drive Torque, Lowering Holding Torque, Screw Mechanical Efficiency and Required Motor Power at 60 RPM, updating live as you change the inputs.

Is my data uploaded anywhere?

No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.

Does it work on a phone?

Yes. The layout adapts to small screens and needs no app or signup.

Screw Jack & Lead Screw Torque Calculator

Calculate raising and lowering torque (in-lbs), mechanical efficiency percentage, and drive motor horsepower for Acme power screws and jacks.

100% free
Private in browser
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Thrust / Axial Load W (lbs)

Nominal Screw Outer Diameter d (Inches)

Screw Lead / Pitch l (Inches per revolution)

Thread Friction Coefficient μ (e.g. 0.15 steel on bronze)

Raising / Lifting Drive Torque (in-lbs)

200.8

Lowering Holding Torque (in-lbs)

70.6

Screw Mechanical Efficiency (%)

31.7

Required Motor Power at 60 RPM (HP)

0.19

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About Screw Jack & Lead Screw Torque Calculator

Calculate raising and lowering torque (in-lbs), mechanical efficiency percentage, and drive motor horsepower for Acme power screws and jacks. You get Raising / Lifting Drive Torque, Lowering Holding Torque and Screw Mechanical Efficiency straight away. Everything runs in your browser, so your data never leaves your device.

How to use Screw Jack & Lead Screw Torque Calculator

Enter your specific project and environment input parameters
Review the computed values, conversions, and ratings in real-time
Adjust variables to simulate different scenarios and tolerances

Key features

Instant dynamic client-side calculations
Interactive sliders and numeric inputs
Industrial and engineering formulas validated against standards
100% private and offline in-browser execution

Frequently asked questions

How accurate are these calculations?: Formulas adhere strictly to industry engineering and trade handbook standards. Always allow safety margins for critical real-world installations.
Does this tool transmit any personal or project data?: No. All calculations run strictly client-side inside your browser. No data ever leaves your computer.
What does the Screw Jack & Lead Screw Torque Calculator give me?: It works out Raising / Lifting Drive Torque, Lowering Holding Torque, Screw Mechanical Efficiency and Required Motor Power at 60 RPM, updating live as you change the inputs.
Is my data uploaded anywhere?: No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
Does it work on a phone?: Yes. The layout adapts to small screens and needs no app or signup.

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