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GB/T 4247-2017 English PDF

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GB/T 4247-2017: Machine bridge reamers with Morse taper shanks
Status: Valid

GB/T 4247: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 4247-2017English114 Add to Cart 3 days [Need to translate] Machine bridge reamers with Morse taper shanks Valid GB/T 4247-2017
GB/T 4247-2004English199 Add to Cart 2 days [Need to translate] Machine bridge reamers with Morse taper shanks Obsolete GB/T 4247-2004
GB/T 4247-1984English199 Add to Cart 2 days [Need to translate] Machine bridge reamers with Morse taper shanks Obsolete GB/T 4247-1984

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Basic data

Standard ID GB/T 4247-2017 (GB/T4247-2017)
Description (Translated English) Machine bridge reamers with Morse taper shanks
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J41
Classification of International Standard 25.100.30
Word Count Estimation 6,672
Date of Issue 2017-12-29
Date of Implementation 2018-07-01
Older Standard (superseded by this standard) GB/T 4247-2004
Regulation (derived from) National Standards Bulletin 2017 No. 32
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 4247-2017: Machine bridge reamers 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.
Machine bridge reamers with Morse taper shanks ICS 25.100.30 J41 National Standards of People's Republic of China Replacing GB/T 4247-2004 Morse taper machine bridge reamer (ISO 2238.2011, Machinebridge registries, IDT) 2017-12-29 Posted 2018-07-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 4247-2004 "Morse taper shank bridge reamer." Compared with GB/T 4247-2004, except editorial repair Change the main technical changes are as follows. --- Modify the normative references; --- text symbols Reamer diameter d, total length L, the blade length l by the standard symbols d1, l3, l2 instead; --- Deleted in Table 1 in inch size. This standard uses the translation method identical with ISO 2238.2011 "Machine Bridge Reamer." The documents of our country that are consistent with the corresponding international documents that are normative references in this standard are as follows. Self - clamping cones for machine tools and tools shanks (ISO 296.1991, MOD). This standard made the following editorial changes. --- Change the standard name; --- Corrected ISO 2238.2011 Table 1 Note l1 and l2 editing errors, "l1 and l2 tolerance" to "l2 and l3 of the public Poor ", after the corresponding letters have been modified. This standard is proposed by the China Machinery Industry Federation. This standard by the National Standardization Technical Committee Tool (SAC/TC91) centralized. This standard was drafted by Chengdu Institute of Tool Co., Ltd. The main drafters of this standard. Zeng Yuhuan, Deng Zhiguang. This standard replaces the standards previously issued as. --- GB/T 4247-1984, GB/T 4247-2004. Morse taper machine bridge reamer

1 Scope

This standard specifies the type and size of Morse taper shank bridge reamers. This standard is given in millimeters diameter range d1 from 6mm to 50.8mm bridge reamer the following dimensions. --- Total length l3; --- Total cutting edge length l2; --- Taper cutting edge length l1. Unless otherwise specified, these reamers are made right-cut.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. ISO 296 machine tools and tool shanks with self-clamping cone (Machinetools-Self-holdingtapersfortoolshanks)

3 type and size

3.1 General provisions Morse taper shank bridge reamer type and size shown in Figure 1 and Table 1. Description. 1 --- taper 1.10; 2 --- Morse taper shank according to ISO 296; a --- taper 1.10, approximately equivalent to the open angle of 5 ° 45 '. Figure 1 Morse taper shank bridge reamer dimensions

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Question 5: Should I purchase the latest version GB/T 4247-2017?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 4247-2017 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.