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GB/T 4256-2022 English PDF

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Q: Should I purchase the latest version GB/T 4256-2022?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 4256-2022 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$219.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 4256-2022: Core drills with parallel shanks and with Morse taper shanks
Status: Valid

GB/T 4256: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4256-2022	219	Add to Cart	3 days	Core drills with parallel shanks and with Morse taper shanks	Valid
GB/T 4256-2004	239	Add to Cart	3 days	Core drills with parallel shanks and with Morse taper shanks	Obsolete
GB/T 4256-1984	199	Add to Cart	2 days	Core drills with parallel shanks	Obsolete

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Basic data

Standard ID: GB/T 4256-2022 (GB/T4256-2022)
Description (Translated English): Core drills with parallel shanks and with Morse taper shanks
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J41
Word Count Estimation: 11,134
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 4256-2022: Core drills with parallel shanks and with Morse taper shanks

---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.
Core drills with parallel shanks and with Morse taper shanks ICS 25.100.30 CCSJ41 National Standards of People's Republic of China Replacing GB/T 4256-2004 Straight shank and Morse taper reamer (ISO 7079.2016, MOD) Published on 2022-07-11 2023-02-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration

foreword

This 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 4256-2004 "Straight Shank and Morse Taper Shank Reaming Drills". Compared with GB/T 4256-2004, except for structural adjustment In addition to editorial changes, the main technical changes are as follows. --- The scope of this document is added for the manufacture of straight shank reamer and Morse taper shank reamer (see Chapter 1); --- Added terms and definitions (see Chapter 3); --- Changed Figure 1 and Figure 2 (see Figure 1 and Figure 2, Figure 1 and Figure 2 of the.2004 edition); --- Added mark (see 4.5); --- Changed the title and content of Chapter 5 (see Chapter 5, Chapter 4 of the.2004 edition); --- Added Appendix A (see Appendix A). This document is modified using ISO 7079.2016 "Straight Shank and Morse Taper Shank Reaming Drills". This document has the following structural adjustments compared to ISO 7079.2016. --- Added Chapter 3 Terms and Definitions; ---4.1, 4.2 correspond to the paragraphs in ISO 7079.2016 Table 1, Table 2, Table 3, Table 4; ---4.3 corresponds to Chapter 3 of ISO 7079.2016, 4.4 corresponds to Chapter 4 of ISO 7079.2016; --- Added 4.5 markers. The technical differences between this document and ISO 7079.2016 and their reasons are as follows. --- Replaced ISO 296 with the normatively quoted GB/T 1443 to adapt to the technical conditions of our country; --- Modified Figure 1 and Figure 2 to facilitate the use of this document; --- The cutting diameter tolerance (h8) in Table 1 and Table 3 is placed in 4.2, which is convenient for the use of this document; ---The length tolerance in Table 2 and Table 4 is put into 4.1, which is convenient for the use of this document; --- Added mark to facilitate the use of this document. 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 Tool Standardization Technical Committee (SAC/TC91). This document is drafted by. Yangzhou Xinjiangzheng Tools Co., Ltd., Jiangyin Sett Precision Tools Co., Ltd., Guohong Tool System (Wuxi) Co., Ltd. Co., Ltd., Chengdu Bangpu Cutting Tool Co., Ltd., Yangzhou Jiangyu Cutting Tool Co., Ltd. The main drafters of this document. Dong Xiangyang, Ni Dongsheng, Lu Shaofeng, Zhang Jibo, Tang Zhouyuan. The previous releases of this document and its superseded documents are as follows. ---First published in 1973 as GB 1141-1973; ---The first revision in 1984, split into GB/T 1141-1984 "Taper Shank Reaming Drill" and GB/T 4256-1984 "Straight Shank Reaming Drill" drill"; --- The second revision in.2004, merged into GB/T 4256-2004; ---This is the third revision. Straight shank and Morse taper reamer

1 Scope

This document specifies the types, dimensions and tolerances of straight shank reamer and Morse taper shank reamer. This document lists two tables for each of the above types of reamer. --- the preferred size; --- Dimensions segmented by diameter range. Only metric sizes are recommended in this document, and only metric sizes will be recommended for this type of reamer in the future. Unless otherwise stated, these reamers are made to cut right. This document applies to the manufacture of straight shank reamers and Morse taper reamers.

2 Normative references

The 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 1443 Self-clamping cones for machine tools and tool handles (GB/T 1443-2016, ISO 296.1991, MOD)

3 Terms and Definitions

There are no terms and definitions that need to be defined in this document.

4 Types and Dimensions

4.1 Reaming drill length tolerance Within a diameter range segment, the minimum and maximum limit values of the total length (l) and the cutting edge length (l1) are allowed to vary, which are equal to the adjacent upper and lower two The length specified by the diameter range segment. Example. For a straight shank reaming drill with a diameter of 15mm, the nominal value of the cutting edge length (l1) is 114mm, which can vary from 108mm to 120mm; the nominal value of the total length (l) is 114mm. The weighing value is 169mm, which can be changed from 160mm to 178mm. 4.2 Diameter tolerance of reamer The diameter tolerance of the reaming drill is h8, which is measured close to the drill tip. 4.3 Type and size of straight shank reamer The type and size of the straight shank reaming drill are as specified in Figure 1 and Table 1 and Table 2.For the correspondence between names and symbols and ISO 13399, please refer to the appendix Record A. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 4256-2022_English be delivered?

Answer: Upon your order, we will start to translate GB/T 4256-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 4256-2022_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 4256-2022_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 4256-2022?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 4256-2022 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.