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GB/T 39542.1-2020: Mechanical pencils for technical drawings - Part 1: Classification, dimensions, performance requirements and testing
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 39542.1-2020 | English | 184 |
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Mechanical pencils for technical drawings - Part 1: Classification, dimensions, performance requirements and testing
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GB/T 39542.1-2020
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Basic data | Standard ID | GB/T 39542.1-2020 (GB/T39542.1-2020) | | Description (Translated English) | Mechanical pencils for technical drawings - Part 1: Classification, dimensions, performance requirements and testing | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y50 | | Classification of International Standard | 97.180 | | Word Count Estimation | 10,123 | | Date of Issue | 2020-07-21 | | Date of Implementation | 2020-07-21 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 39542.1-2020: Mechanical pencils for technical drawings - Part 1: Classification, dimensions, performance requirements and testing
---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.
Mechanical pencils for technical drawings - Part 1.Classification, dimensions, performance requirements and testing
ICS 97.180
Y50
National Standards of People's Republic of China
Mechanical drawing pencil
Part 1.Classification, dimensions, performance requirements and tests
2020-07-21 released
2020-07-21 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Foreword
GB/T 39542 "Technical Drawing Mechanical Pencil" is divided into three parts.
---Part 1.Classification, size, performance requirements and tests;
---Part 2.Classification and size of black lead core;
---Part 3.Black lead core HB lead core bending strength.
This part is Part 1 of GB/T 39542.
This section was drafted in accordance with the rules given in GB/T 1.1-2009.
The translation method used in this part is equivalent to the ISO 9177-1.2016 ``Technical Drawing Mechanical Pencil Part 1.Classification, Dimensions, Performance Requirements
Summation Test.
The Chinese documents that have a consistent correspondence with the international documents cited in this section are as follows.
---GB/T 17450-1998 technical drawing line (ISO 128-20.1996, IDT);
---GB/T 39542.2-2020 Technical drawing mechanical pencil Part 2.Black lead core classification and size (ISO 9177-2.1989, IDT).
This part was proposed by the China National Light Industry Council.
This part is under the jurisdiction of the National Pen Making Standardization Technical Committee (SAC/TC378).
Drafting organizations of this section. Shanghai Chenguang Stationery Co., Ltd., Shanghai Pen Industry Research Institute, Shanghai Lemei Stationery Co., Ltd., Bei
Development Group Co., Ltd., Anshuo Stationery (Shanghai) Co., Ltd., Qingdao Yingge Stationery Co., Ltd., Shenzhen Qixin
Group Co., Ltd., Wenzhou Hobby Pen Co., Ltd., Yiwu Meineng Pen Co., Ltd.
The main drafters of this section. Yao Hezhong, Yao Hongjun, Li Chang, Chen Jingqiang, Huang Xiaolei.
Mechanical drawing pencil
Part 1.Classification, dimensions, performance requirements and tests
1 Scope
This part of GB/T 39542 specifies the classification, size, performance requirements and test methods of mechanical pencils for technical drawing.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document.
For undated references, the latest version (including all amendments) applies to this document.
ISO 128-20 General principles of technical drawings. Part 20.Drawings
ISO 9177-2 Mechanical Pencil Part 2.Classification and Size of Black Lead
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Mechanical pencil
A hand-held writing tool that can hold and output lead cores for writing or drawing.
4 categories
Mechanical pencils should be classified according to mechanical structure type (see Table 1) and nominal diameter (see Table 2). For the classification and size (diameter and length) of the lead core, see ISO 9177-2.
Table 1 Classification by mechanical structure type
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