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JB/T 12145-2015Superhard twist drills with exchangeable tips (English PDF)

超硬可换钻尖式麻花钻

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

April 30, 2015

Implementation date

October 1, 2015

Scope

JB/T 12145-2015 is the English-translated version of 超硬可换钻尖式麻花钻.

JB/T 12145-2015 is the Chinese machinery industry standard covering superhard twist drills with exchangeable tips. It was issued on 30 April 2015 and has been in force since 1 October 2015, as a first edition.

The document is under the responsibility of the Ministry of Industry and Information Technology. This page is published from the official record of the 2015 edition.

The figures, limits and tables the standard contains are those of the document itself, delivered in full with the English translation.

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Document preview — JB/T 12145-2015

National Standard of the People's Republic of China

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

1 Scope
2 Normative references
3 Types of construction and dimensions
3.1 Construction
3.2 Types and dimensions of the straight shank twist drill
3.3 Types and dimensions of the Morse taper shank twist drill
3.4 Examples of marking
4 Technical requirements
4.1 Tolerances
4.2 Material and hardness
4.3 Appearance and surface roughness
5 Marking and packaging
5.1 Marking
5.2 Packaging
Annex A (normative) Types and dimensions of the shank of the straight shank twist drill with exchangeable tip
Annex B (informative) Locating hole of the insert and forms of the drill point
B.1 Form of the locating hole of the insert
B.2 Forms of the drill point
B.3 Dimensions of the insert

Document data

International classification (ICS): 25.100.30.

Chinese classification (CCS): J41.

Estimated length of the Chinese original: 11,144 words.

3 Types of construction and dimensions

4 Technical requirements

5 Marking and packaging

......
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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