GB/T 28256-2012Trapezoidal taps (English PDF)
梯形螺纹丝锥
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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 28256-2012 is the English-translated version of 梯形螺纹丝锥.
GB/T 28256-2012 is the Chinese standard "Trapezoidal taps". Its scope clause reads: This standard specifies the type and dimensions of trapezoidal thread taps (high performance grade and general grade), thread tolerances, technical requirements, marking and packaging And other basic requirements.
This standard applies to the processing of ordinary trapezoidal thread (GB/T 5796.1 ~ GB/T 5796.4) with the trapezoidal thread tap (hereinafter referred to as silk Cone).
The type of tap is divided into type I (short type), type II (long type). Its clauses include normative reference documents; taps of the type and size.
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Document preview — GB/T 28256-2012
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 type and dimensions of trapezoidal thread taps (high performance grade and general grade), thread tolerances, technical requirements, marking and packaging
And other basic requirements.
This standard applies to the processing of ordinary trapezoidal thread (GB/T 5796.1 ~ GB/T 5796.4) with the trapezoidal thread tap (hereinafter referred to as silk
Cone).
The type of tap is divided into type I (short type), type II (long type).
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
GB/T 4267 Straight handle rotary tool Shank diameter and size of the drive head
GB/T 5796.1 Trapezoidal thread - Part 1. Tooth type
Trapezoidal threads - Part 2. Diameter and pitch series GB/T Trapezoidal threads - Part 3. Basic dimensions
Trapezoidal threads - Part 4. Tolerances
3 Taps of the type and size
3.1
The type and size of the tap are specified in Figures 1 and 1.
figure 1 […]
......
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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