GB/T 22522-2021 English PDFUS$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 22522-2021: Metric series wires for measuring screw threads Status: Valid GB/T 22522: Historical versions
Basic dataStandard ID: GB/T 22522-2021 (GB/T22522-2021)Description (Translated English): Metric series wires for measuring screw threads Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: J42 Word Count Estimation: 9,954 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 22522-2021: Metric series wires for measuring screw threads---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Metric series wires for measuring screw threads ICS 17:040:30 CCSJ42 National Standards of People's Republic of China Replacing GB/T 22522-2008 Metric series measuring needles for measuring threads Published on 2021-12-31 2022-07-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Types and Dimensions 1 4:1 Type I measuring needle 1 4:2 Type II measuring needle 2 4:3 Type III measuring needle 2 5 Requirements 2 5:1 Materials 2 5:2 Hardness and surface roughness of measuring surface Ra 2 5:3 Accuracy level and measuring needle selection 2 5:4 Group measuring needles 3 5:5 Measuring pin number plate 3 6 Inspection conditions and methods 3 6:1 Inspection conditions 3 6:2 Inspection method 3 7 Logo and Packaging 3 Appendix A (informative) Selection of measuring needles corresponding to common threads 4 Figure 1 Schematic diagram of type I measuring needle (nominal diameter D is 0:115mm~0:577mm) 1 Figure 2 Schematic diagram of type II measuring needle (nominal diameter D is 0:722mm~1:629mm) 2 Figure 3 Schematic diagram of type III measuring needle (nominal diameter D≥1:732mm) 2 Table 1 Accuracy class 3 Table A:1 Measuring needle 4 for measuring the pitch diameter of common thread (M) Table A:2 Measuring needle 5 for measuring the pitch diameter of a unified thread (UN) Table A:3 Measuring needle 5 for measuring the pitch diameter of pipe threads (G, R) Table A:4 Measuring needle 6 for measuring the pitch diameter of trapezoidal thread (Tr) forewordThis document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted: This document replaces GB/T 22522-2008 "Three Needles for Thread Measurement": Compared with GB/T 22522-2008, except for structural adjustment and editing In addition to the editorial changes, the main technical changes are as follows: a) The basic parameters of the measuring needle are deleted (see 4:2 of the:2008 edition); b) Changed the hardness requirements of the measuring surface of the measuring needle (see 5:2, 5:1 of the:2008 edition); c) Added the requirements for accuracy level 2 (see 5:3); d) The inspection conditions and methods for measuring needles are added (see Chapter 6); e) The requirements of the number of this document should be marked on the packing box with the measuring needle (see 7:2): Please note that some content of this document may be patented: The issuing agency of this document assumes no responsibility for identifying patents: This document is proposed by China Machinery Industry Federation: This document is under the jurisdiction of the National Standardization Technical Committee of Measuring Tools and Measuring Instruments (SAC/TC132): This document is drafted by: Chengdu Xincheng Quantity Tools Co:, Ltd:, Zhejiang Institute of Metrology, Suzhou Guoliang Measuring Tools Technology Co:, Ltd:, Henan Institute of Metrology, Chengdu Tool Research Institute Co:, Ltd:, Heilongjiang Institute of Metrology Verification and Testing, Shenzhen Metrology Quality Inspection Testing Institute: The main drafters of this document: Deng Yi, Mao Zhenhua, Zhao Yonghai, Lu Jinyu, He Yixian, Zhang Haibo, Wu Peigang: The previous versions of this document and its superseded documents are as follows: ---First published in:2008 as GB/T 22522-2008; ---This is the first revision: Metric series measuring needles for measuring threads1 ScopeThis document specifies the type and size, requirements, inspection conditions and methods, marking and packaging of metric series measuring needles for measuring threads: This document is suitable for detecting common thread (M), unified thread (UN), 55° pipe thread (G, R), Metric series measuring needles (hereinafter referred to as "measuring needles") are used for measuring the pitch diameter of trapezoidal threads (Tr):2 Normative referencesThe contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document: GB/T 14791-2013 Thread terminology GB/T 17163 Basic terminology of geometric measuring instruments GB/T 17164 Terminology of Geometric Measuring Instruments Product Terminology3 Terms and DefinitionsThe terms and definitions defined in GB/T 14791-2013, GB/T 17163, GB/T 17164 and the following terms and definitions apply to this document: 3:1 A cylindrical working face with accurate dimensions, a physical measuring tool for indirect detection of workpieces such as threads:4 Types and Dimensions4:1 Type I measuring needle The type and size of the type I measuring needle are shown in Figure 1: The diagrams are for illustration only and do not represent the detailed structure: in millimeters Figure 1 Schematic diagram of type I measuring needle (nominal diameter D is 0:115mm~0:577mm) ...... |
