GENERAL PURPOSE ACME SCREW THREAD FORM, DESIGN DIMENSIONS
The General Purpose threads consist of 29° included angle and a series of diameters and related pitches, as recommended in the ANSI B1.5 Standard. These diameters and pitches have been chosen to meet current requirements with the least number of items in order to condense amount of inventory of both tools and gages. The tolerances specified in this standard are relevant to lengths of engagement not greater than twice the nominal major diameter.
The ACME screw thread form has a 29° included angle. ACME screw threads are perceived as a bilateral transverse motion screw thread. The ACME screw thread form offers high strength with ease of machining and assembly. Acme screw theads are largely used for feed screws and adjusting screws. The ACME screw thread may be used in assemblies with the internal thread rigidly fixed and movement of the external thread in a direction perpendicular to its axis limited by its bearing or bearings.
The basic dimensions of the Acme thread form for the most generally used pitches are given in Table 1.
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This data is provided for general information only. The intention is to provide accurate information,regardless,errors may exist in the supplied information. If accuracy is critical, base your final decisions on the data provided in the root document: ANSI/ASME B1.5; If you any request or questions please contact ： sales@fyougauges.com
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