Use this engineering calculation for a transparent preliminary estimate or independent arithmetic check when geometry, materials, loads, operating conditions, and units are defined consistently.

Handle Radius Meters (m)

Required number input.

Lead Meters Per Revolution (m/rev)

Required number input.

Ideal frictionless screw-jack force advantage 2πr/p from handle radius r and axial thread lead p per revolution. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Mechanical Advantage

The resulting mechanical advantage returned as a number.

• Ideal mechanical advantage omits friction, deformation, self-locking behavior, stability, contact stress, geometry limits, and efficiency. Input travel and real force must be checked for the actual mechanism.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check assumptions against drawings, measurements, current material data, and the applicable design code. Apply required load combinations and safety factors, then obtain qualified review and testing for consequential designs.

• Clutch Torque Single Plate

  Ideal single-plate clutch torque from friction coefficient, axial normal force, effective radius and active friction surfaces.

• Lever Mechanical Advantage

  Ideal lever force advantage from effort-arm length divided by load-arm length.

• Wedge Mechanical Advantage

  Ideal frictionless wedge mechanical advantage as driven length divided by wedge rise.