ACME General Purpose Thread Design Calculator

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.

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

 Input Data Major Dia. External Thread D = Must be greater than .25 Pitch (Thrds per Inch) n = Basic Dimension Data Basic Pitch Dia. E = Basic Minor Diameter K = Pitch Decimal Distance P = Thickness at Pitch Line t = Basic Height of Thread h = Basic Width of Thread Flat F = External ACME General Thread Internal ACME General Thread Results ACME Thread Class 2 Results ACME Thread Class 2 Major Dia. Max. = Major Dia. Max. = Major Dia. Min. = Major Dia. Min. = Pitch Dia. Max. = Pitch Dia. Max. = Pitch Dia. Min. = Pitch Dia. Min. = Minor Dia. Max. = Minor Dia. Max. = Minor Dia. Min. = Minor Dia. Min. = Results ACME Thread Class 3 Results ACME Thread Class 3 Major Dia. Max. = Major Dia. Max. = Major Dia. Min. = Major Dia. Min. = Pitch Dia. Max. = Pitch Dia. Max. = Pitch Dia. Min. = Pitch Dia. Min. = Minor Dia. Max. = Minor Dia. Max. = Minor Dia. Min. = Minor Dia. Min. = Results ACME Thread Class 4 Results ACME Thread Class 4 Major Dia. Max. = Major Dia. Max. = Major Dia. Min. = Major Dia. Min. = Pitch Dia. Max. = Pitch Dia. Max. = Pitch Dia. Min. = Pitch Dia. Min. = Minor Dia. Max. = Minor Dia. Max. = Minor Dia. Min. = Minor Dia. Min. =

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