Jul 1, 2009

Lead Screw Design Calculator – Metric – ISO 2904-1977

Download Lead Screw Calculator

This calculator is designed to calculate torque required to raise the load and torque required to lower the load for Metric Trapezoidal Lead Screw according to  ISO-2904-1977 standard. This calculator also can be used to check the self locking capability of lead screws by referring the load lowering torque.

Formula for torque to raise the load,


Formula for torque to lower the load,


The calculator has been verified by solving some text book problems.

Click Here To Download This Excel Calculator



  • Shigley’s Mechanical Engineering Design
  • Machinery's Handbook 27th Edition

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