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JB/T 12140-2015Small size thread forming taps (English PDF)

小直径挤压丝锥

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

April 30, 2015

Implementation date

October 1, 2015

Scope

JB/T 12140-2015 is the English-translated version of 小直径挤压丝锥.

JB/T 12140-2015 is the recommended Chinese machinery industry standard for small size thread forming taps, treating both a general grade and a high grade.

It lays down the types and dimensions of the taps, the tolerances of the thread they form, the technical requirements, and the rules for marking and packaging; an annex gives the pre-hole dimensions for thread forming.

The taps it covers are those used on non-ferrous metals and low-strength ferrous parts, for small screw threads of 0.8 mm nominal diameter to GB/T 15054.1 through GB/T 15054.4 and for common threads from 1 mm to 4 mm nominal diameter to GB/T 192, GB/T 193, GB/T 196 and GB/T 197. GB/T 4267 is quoted as well.

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Document preview — JB/T 12140-2015

National Standard of the People's Republic of China

ICS: 25.100.50

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

1 Foreword

JB/T 12140-2015 was issued by Ministry of Industry and Information Technology of the People's Republic of China on 30 April 2015 and has been in force since 1 October 2015.

2 Scope

This standard is the recommended Chinese machinery industry standard for small size thread forming taps, treating both a general grade and a high grade. It lays down the types and dimensions of the taps, the tolerances of the thread they form, the technical requirements, and the rules for marking and packaging; an annex gives the pre-hole dimensions for thread forming. The taps it covers are those used on non-ferrous metals and low-strength ferrous parts, for small screw threads of 0.8 mm nominal diameter to GB/T 15054.1 through GB/T 15054.4 and for common threads from 1 mm to 4 mm nominal diameter to GB/T 192, GB/T 193, GB/T 196 and GB/T 197. GB/T 4267 is quoted as well.

3 Normative references

JB/T 12140-2015 cites the following standards, which apply in full or in part through the references made to them in its clauses.

GB/T 15054.1

GB/T 15054.2

GB/T 15054.3

GB/T 15054.4

GB/T 192

GB/T 193

GB/T 196

GB/T 197

GB/T 4267

4 About this standard

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

English translation: about 15 pages

5 Classification and status

International classification (ICS): 25.100.50

Prefix JB/T: recommended standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

Similar standards

JB/T 12141-2015|JB/T 12977-2016|JB/T 8364.2-2010|JB/T 8364.3-2010|GB/T 28253-2025|JB/T 9933.4-2015

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