ACME General Purpose Thread Design Calculator

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Acme General Purpose Screw Threads per. ASME/ANSI B1.5

This ACME Thread General Purpose Design Calculator will determine the three classes of General Purpose, 2G, 3G, and 4G, for the external and internal threads. In application, it is suggested that external and internal threads of the same class be used together for general purpose assemblies, Class 2G being the preferred choice. If less backlash or end play is desired, Classes 3G and 4G are provided.

Acme General Purpose Screw Threads

Equations utilized in this calculator are derived from ASME/ANSI B1.8.