Acme General Purpose Screw Threads per.
This ACME Thread General Purpose Design Calculator will determine the three classes of General Purpose, 2G, 3G,
and 4G, for the external and internal
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.
Equations utilized in this calcualtor are derived from ASME/ANSI B1.8.