GB/T 28691-2012High precision trapezoidal thread broaching tap (English PDF)
高精度梯形螺纹拉削丝锥
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 3, 2012
Implementation date
January 1, 2013
Scope
GB/T 28691-2012 is the English-translated version of 高精度梯形螺纹拉削丝锥.
GB/T 28691-2012 is the Chinese standard "High precision trapezoidal thread broaching tap". Its scope clause reads: This standard specifies the precision trapezoidal thread broaching tap the type and size of the thread tolerance, technical requirements, marking and packaging of basic Claim.
This standard applies to the processing trapezoidal thread (JB/T2886-2008 7, 8, 9 for non-coordinating nut) with high precision trapezoidal thread broaching Taps (hereinafter referred to as taps). Its clauses include type and size.
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Document preview — GB/T 28691-2012
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 Terms and definitions
1 Scope
This standard specifies the precision trapezoidal thread broaching tap the type and size of the thread tolerance, technical requirements, marking and packaging of basic
Claim.
This standard applies to the processing trapezoidal thread (JB/T2886-2008 7, 8, 9 for non-coordinating nut) with high precision trapezoidal thread broaching
Taps (hereinafter referred to as taps).
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 5796.1-2005 trapezoidal thread - Part 1. tooth shape (ISO 2901.1993, MOD)
JB/T2886-2008 machine trapezoidal screw, nut and technical conditions
3 type and size
3.1
tap Type size in Figure 1 and in Table 1.
a) nominal thread diameter less than or equal to 30mm b) nominal thread diameter greater than 30mm
Description. Calibration section length dimension l2 is 5-6 pitch P. The total length dimension l and each count, determined according to the use.
figure 1 […]
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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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