Jul 2, 2009

ACME Lead Screw Torque Calculator – Unified – ANSI B1.5-1988

Download Acme Lead Screw Calculator ANSI B1.5

This calculator is designed to calculate torque required to raise the load and torque required to lower the load for Acme Lead Screw according to  ASME/ANSI B1.5-1988 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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