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Sowant is a profession thread gauges manufacture in China, we can produce Acme thread ring gage, Acme thread Plug Gage,Stub Acme thread ring gage, Acme thread Plug Gage,Buttress Thread ring and plug gages.
| American National Standard Stub Acme Threads are defined in ASME/ANSI B1.8 and are for atypical applications where, due to mechanical or metallurgical considerations, a coarse-pitch thread of shallow depth (thin wall) is necessary. The fit of Stub Acme threads corresponds to the Class 2G General Purpose Acme Thread found in ASME/ANSI B1.5. For a fit having minimal backlash, the tolerances and allowances for classes 3G or 4G General Purpose Acme Threads may be used. |
| The Stub ACME screw thread form can be applied to either Genrral or Centrializing ACME screw threads. |
| The Major and Minor Diameter allowances for Stub Acme threads are the same as those given for General Purpose or Centrializing Acme screw threads. Pitch Diameter allowances for Stub Acme threads are the same as for Class 2G General Purpose or Centrializing Acme Screw Threads. Stub Acme Threads have a preferred series of diameters and pitches which happens to be the same as General Purpose or Centrializing Acme Screw Threads. |
| The proper method of designation for Standard Stub Acme threads is illustrated in the following examples: 0.500"-20 Stub Acme-2G ... indicates that the thread has a ½" major diameter, 20 threads per inch, class 2G, right hand, single thread, Standard Stub Acme thread. This Designation stays the same with Left Handed Threads except you add LH behind the description, for example: 0.500"-20 Stub Acme-2G LH. |
| Complicating the world of ACME further, the Standard Stub Acme does not always provide an accepted thread for all applications. Basic data for two other frequently used forms have been tabulated. These are designated MODIFIED Forms 1 and 2. You are strongly urged to ALWAYS use the Standard Stub Acme form in preference to the Modified form where it is realistic. Using the modified form does not eliminate the requirement for identifying the class-of-fit. |
| Modified Form 1, (M1) - The pitch and minor diameters will be smaller than similar values for the standard form. |
| Modified 2, (M2) - The pitch and minor diameters will be larger than values for the standard form. |
| Thread designation is the same as the Standard Stub Acme except that you add the M1 or M2 after the Class or hand in case of a LH thread (i.e. 0.500"-20 Stub Acme-2G M1 or 0.500"-20 Stub Acme-2G LH M1) |
| For more information click the links below:(links not active yet) " Stub Acme Thread Profile " Stub Acme Thread Data " Stub Acme Modified (M1,M2) Thread Profile " Stub Acme Modified (M1,M2) Thread Data |
Sowant Precision Gages Co.,lTd. offers a complete line of standard and special General Purpose Acme Thread Gages per ASME B1.5 - 1997. Acme Thread Gauges are used to gage internal and external threaded product. Acme Thread Gages are priced on request. The following list of diameters and associated pitches are recommended as preferred. The threads below have been specifically selected to meet requirements with the least number of items in order to keep to a minimum the inventory of gages and tooling. Other size combinations including multiple start threads, centralizing threads, Stub Acme, Centralized Stub Acme, 60 degree Stub and diameters over 5.0 inches can be priced on request. Acme General Purpose threads have 3 classes of fit - 2G, 3G, and 4G.
you can see many kinds Acme thread ring gages and stub acme thread ring and plug gages' pictures on https://www.acmegage.com
standard and special General Purpose Acme Thread Gauges per ASME B1.5 – 1997. Acme Thread Gages are used to gage internal and external threaded product. Thread size combinations including multiple start threads, centralizing threads, Stub Acme, Centralized Stub Acme, 60 degree Stub and diameters over 5.0 inches can be priced on request. Acme General Purpose threads have 3 classes of fit – 2G, 3G, and 4G.
General Purpose Threads class 2G, 3G, and 4G are designed with clearance on all diameter which enables free movement. General Purpose These threads are ideal for assemblies where the internal thread is rigidly fixed and the external thread moves perpendicular to its axis. It is recommended that threads of the same class should be assembled together. Class 2G is the most popular thread class of fit. Class 3G and 4G should be used if less backlash is required.
Other types of threads are Stub Acme and Centralizing Stub Acme.
All Acme threads have a 29 degree included angle.
| 1 3/4-6 STUB ACME-2G |
| 1.000-12 STUB ACME-2G |
| 1 3/8-5 ACME-2G LH |
| 1 1/4-5 ACME-2G |
| M170x6-6H |
| 1 1/4-5 ACME-2G LH NOGO |
| 1 1/8-8 STUB ACME-2G |
| 1"-1/6"P-1/3"L-ACME 2G LH |
| 1-3/8"-1/5"P-2/5"L-ACME 2G LH |
| 1-7/8"-1/5"P-2/5"L-ACME 2G LH |
| 1-5ACME MOD-2G LH 29° |
| 3-4 STUB ACME-2G |
| 3 1/2-4 STUB ACME-2G |
| 4-4 STUB ACME-2G |
| 6 1/2-4 ACME-2G |
| 1-12 STUB ACME-2G GO |
| 6 5/16-2 HBPV LH |
| 5-4 HBPV LH |
| Tr 13x3 P1.5 |
There are three classes of General Purpose ACME threads, 2G, 3G, and 4G each class provides some clearance on all standard size diameters for free movement, and are 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. more infomation vist https://www.acmegage.com
Designs should only utilize external and internal ACME threads of the same class and type, with Class 2G being the preferred choice. If less backlash or end play is desired, Classes 3G and 4G are provided. Class 5G is not recommended for new designs.
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