The following table defines recommended industry standard sizes for External ACME General Purpose Threads per American National Standard ASME/ANSI B1.5.

Acme is a trapezoidal thread profile with a 29° V angle, defined in ASTM B1.5. It is the most popular thread used for traversing linear motion (For example, lead screws and power screws) due to its ability to withstand large loads and ease of manufacturing.

Dec 16, 2024 · This article’ll break down the ACME Thread designation, profile, angle, calculation formulas, series & classes, and dimensions with size charts for internal and external ACME threads.

Use the chart to find dimensions such as the major diameter, minor diameter, and pitch diameter for the specific thread size you need. Check the tolerances to ensure precision and proper fit. Match the chart's specifications to the tools you're using, like thread gages, taps, or dies.

Standard sizes for External ACME General Purpose Threads per American Standard ASME/ANSI B1.5. Major, minor and pitch diameter are given in the table for 2G, 3G and 4G tolerance classes.

Find the right ACME thread sizes quickly with our comprehensive size chart, enhancing your design and assembly efficiency.

The following table defines recommended industry standard sizes for Internal ACME General Purpose Threads per American National Standard ASME/ANSI B1.5. All dimensional data is given in inches.

Acme Thread Data Sheets: The tables following provide information designer’s need to apply 29° Acme threads to projects properly. Please note that callouts for Acme threads currently (2006) exist as: X.XXXX-TPI-NG-ACME-EXTERNAL for screw threads or X.XXXX-TPI-NG-ACME-INTERNAL for nut threads.

While standard series for Acme threads have been established, information on a wide range of special diameter and pitch combinations (with corresponding tolerances for special applications) is available from Landis Threading Systems.

Pre-finished 3d models of your ACME thread according to ANSI / ASME B1.5-1977 in your desired thread size. Download in STEP or SolidWorks format.