The tables following provide information designer s need to apply 29 176 Stub Acme threads to projects properly Please note that callouts for Stub Acme threads currently 2012 exist as X XXXX TPI NG STUB ACME EXTERNAL for screw threads or X XXXX TPI NG STUB ACME INTERNAL for nut threads ANSI Standard Hardware Menu 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 Stub ACME Thread ANSI ASME B1 8 1977 The ACME thread was developed as a compromise to offer better strength than a V form while overcoming the problems with the square thread form The flank angle is 29 176 ACME STUB ACME Thread Strength Calculation Wihaga Scope The following equations are the standard formulas for conducting Acme Stub Acme thread strength analysis on threaded connections This specification contains the equations used by the Acme Stub Acme AutoProgram All assumptions should be understood and applied in the proper context American National ThreadANSI ACME B1 5 1977 American National Thread ANSI ACME B1 5 1977 The ACME thread was developed as a compromise to offer better strength than a V form while overcoming the problems with the

Stub Acme 29 Degree Threads American National Standard Stub Acme Threads This American National Standard ASME ANSI B1 8 1988 R2001 provides a Stub Acme screw thread for those unusual applications where due Oct 14 2016 nbsp 0183 32 The acme thread form is most often used for lead screws jack screws CNC systems and many other applications Also used in industrial applications requiring heavy torque and power transmission such as lathes milling machines and presses Acme threads with a 29 degree angle are broader stronger and squarer than standard V shaped threads The ANSI ASME B1 5 ACME Screw Threads Standard provides General Purpose ACME and Centralizing ACME Centralizing Acme threads have limited clearance at the major diameters of both the internal and external threads and are used extensively for feed screws Restricted clearance enables a bearing at the major diameter of the thread to preserve 94 rows nbsp 0183 32 The following table defines recommended industry standard sizes for External ACME 1 Acme Thread Form The Acme thread form is the original trapezoidal screw thread that was developed back in the late 1800s 29 176 thread angle Half of the pitch the distance between a point on one thread and a corresponding point on the next thread that is parallel to the axis The apex and valley of the thread are flat

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 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 Where X XXXX is the nominal major diameter given to four decimal places TPI are the threads per inch and NG is the class 2G 3G or 4G of fit 2 is the loosest and 4American Standard Acme Screw Thread Dimensions h Basic depth of thread h9 Depth of thread with clearance K Tap drill Basic minor diameter of nut Fc Width of flat at crest of thread Fr Width of flat at bottom of space FOR 10 OR LESS THREADS PER INCH h9 Pplus 010 2 Fr 3707minus 0052 n T D plus 020 n Number of threads per inch p Pitch of Acme Thread Abbreviations The following abbreviations are recommended for use on drawings and in specifications and on tools and gages ACME Acme threads G General Purpose C Centralizing P pitch L lead LH left hand THREAD DIMENSIONS FOR ACME AND STUB ACME THREADS When created prior to 1895 Acme screw threads were intended to replace square threads and a variety of threads of other forms used chiefly for the purpose of traversing motion on machines tools etc Acme screw threads are now extensively used for a variety of purposes Long length Acme threads are

American National Standard Stub Acme Threads This American National Standard ASME ANSI B1 8 1988 R2001 provides a Stub Acme screw thread for those unusual applications where due to mechanical or metallurgical considerations a coarsepitch thread of shallow depth is required The fit of Stub Acme threads corresponds to the Class 2G General CENTERLESS GROUND AND STANDARD ROLLED 2G THREADFORM MATERIAL 300 Series Stainless Steel FEATURES Low cost alternative to ball screw assemblies THREAD MOUNT ACME NUTS O D TH C L 1 000 1 500 1 000 1 500 375 500 500 750 800 1500 2000 AB250F 050 AB250F 075 100 150 160 300 400 Screw Size C 7 16 8 1 2 4 1 2 10 5 8 10 3 4 381 rows nbsp 0183 32 ISO 2904 Metric Trapezoidal ACME Threads Comparison of ISO and DIN May 13 2020 nbsp 0183 32 General Purpose ACME Screw Thread Data per ANSI ASME B1 5 There are 3 different forms of ACME Screw Thread General Purpose ACME Centralizing ACME and Stub ACME On this page we are talking about the General Puropse ACME Screw Thread as defined in ANSI ASME B1 5 The ACME screw thread form has a 29 176 included angle 94 rows nbsp 0183 32 The following table defines recommended industry standard sizes for External ACME