GB/T 28255-2012Taps with the hollow interior to deposit the swarf (English PDF)
内容屑丝锥
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
March 9, 2012
Implementation date
July 1, 2012
Scope
GB/T 28255-2012 is the English-translated version of 内容屑丝锥.
GB/T 28255-2012 is the Chinese standard "Taps with the hollow interior to deposit the swarf". Its scope clause reads: This standard specifies the basic requirements for the type of content crumbs tap size, technical requirements and mark the package.
This standard applies to the processing of common screw (GB/T 192, GB/T 193, GB/T 196, GB/T 197) of content crumbs tap machine, wire Precision taper thread by H1, H2, H3 with three kinds of manufacturing tolerances. Its clauses include content crumbs tap type and size.
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Document preview — GB/T 28255-2012
National Standard of the People's Republic of China
- ICS
- 25.100.50
- Classification
- J 41
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 content crumbs tap type and size
- 3.1 Integral content crumbs tap
1 Scope
This standard specifies the basic requirements for the type of content crumbs tap size, technical requirements and mark the package.
This standard applies to the processing of common screw (GB/T 192, GB/T 193, GB/T 196, GB/T 197) of content crumbs tap machine, wire
Precision taper thread by H1, H2, H3 with three kinds of manufacturing tolerances.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 192 ordinary screw threads - Basic model
GB/T 193 series common thread diameter and pitch
GB/T 196 common thread basic size
GB/T 197 common thread tolerance
3 content crumbs tap type and size
3.1 Integral content crumbs tap
3.1.1
Integral content crumbs tap the type shown in Figure 1, dimensions are given in Table 1. Cone parameters refer to Appendix B and Appendix C.
Figure 1 Integral content crumbs tap […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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