JB/T 9927.1-2019Short-thread milling machines - Part 1: Testing of the accuracy (English PDF)
短螺纹铣床 第1部分：精度检验
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
May 2, 2019
Implementation date
January 1, 2020
Scope
JB/T 9927.1-2019 is the English-translated version of 短螺纹铣床 第1部分：精度检验.
JB/T 9927.1-2019 is the Chinese machinery industry standard that covers the accuracy of short thread milling machines. It sets the requirements for geometric accuracy and working accuracy, and gives the inspection methods with the tolerances that go with them.
The part applies to short thread milling machines that cut ordinary threads by the comb milling method, with a maximum milling diameter of 200 mm, a maximum milling length of 80 mm and a maximum workpiece length of 2500 mm.
It quotes GB/T 197-2018, GB/T 8170-2008 and GB/T 17421.1-1998. It replaces JB/T 9927.1-1999.
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Document preview — JB/T 9927.1-2019
National Standard of the People's Republic of China
- ICS
- 25.080.99
- Replacing
- JB/T 9927.1-1999
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Foreword
- Scope
- Normative references
- About this standard
- Related standards
- Classification and status
1 Foreword
JB/T 9927.1-2019 was issued by MIIT on 2 May 2019.
It replaces the earlier edition JB/T 9927.1-1999.
It is one of 3 parts of the JB/T 9927 series.
2 Scope
This standard is the Chinese machinery industry standard that covers the accuracy of short thread milling machines. It sets the requirements for geometric accuracy and working accuracy, and gives the inspection methods with the tolerances that go with them. The part applies to short thread milling machines that cut ordinary threads by the comb milling method, with a maximum milling diameter of 200 mm, a maximum milling length of 80 mm and a maximum workpiece length of 2500 mm. It quotes GB/T 197-2018, GB/T 8170-2008 and GB/T 17421.1-1998. It replaces JB/T 9927.1-1999.
3 Normative references
JB/T 9927.1-2019 cites the following standards, which apply in full or in part through the references made to them in its clauses.
GB/T 197-2018 — General purpose metric screw threads -- Tolerances
GB/T 8170-2008 — Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 17421.1-1998
4 About this standard
Issued by: MIIT
English translation: about 18 pages
5 Related standards
Other parts of this standard:
JB/T 9927.2-1999 — Short thread milling machines - Technical requirements
JB/T 9927.2-2019 — Short thread milling machines - Part 2: Technical requirements
Other editions:
JB/T 9927.1-1999 (earlier edition)
6 Classification and status
International classification (ICS): 25.080.99
Prefix JB/T: recommended standard.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 18 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 197-2018General purpose metric screw threads -- Tolerances
- GB/T 8170-2008Rules of rounding off for numerical values & expression and judgement of limiting values
- GB/T 17421.1-1998Test code for machine tools - Part 1: Geometric accuracy of machines operating under no-load or quasi-static conditions
Similar standards
Editions of JB/T 9927.1
| Edition | Title | Revision | Status |
|---|---|---|---|
| JB/T 9927.1-2019 | Short-thread milling machines - Part 1: Testing of the accuracy | current edition | Current |
| JB/T 9927.1-1999 | Short-thread milling machines - Part 1: Testing of the accuracy | previous edition | Superseded |
This page sells the current edition, JB/T 9927.1-2019. Earlier editions are listed for reference only.
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Related Standards
GB/T 197-2018 — General purpose metric screw threads -- Tolerances
GB/T 8170-2008 — Rules of rounding off for numerical values & expression and judgement of limiting values
JB/T 9927.2-2019 — Short thread milling machines - Part 2: Technical requirements
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JB/T 9927.1-2019
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