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Database: 189760 (18 Oct 2025)
JB/T 7421.1-2006 English PDF
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JB/T 7421.1-2006
: Drilling and milling machines. Part 1: Testing of the accuracy
Status: Valid
JB/T 7421.1: Evolution and historical versions
Standard ID
Contents [version]
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STEP2
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Standard Title (Description)
Status
PDF
JB/T 7421.1-2006
English
449
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3 days [Need to translate]
Drilling and milling machines. Part 1: Testing of the accuracy
Valid
JB/T 7421.1-2006
JB/T 7421.1-1994
English
359
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3 days [Need to translate]
(Milling drilling Accuracy)
Obsolete
JB/T 7421.1-1994
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Basic data
Standard ID
JB/T 7421.1-2006 (JB/T7421.1-2006)
Description (Translated English)
Drilling and milling machines. Part 1: Testing of the accuracy
Sector / Industry
Mechanical & Machinery Industry Standard (Recommended)
Classification of Chinese Standard
J54
Classification of International Standard
25.080.40
Word Count Estimation
14,125
Date of Issue
2006-11-27
Date of Implementation
2007-05-01
Older Standard (superseded by this standard)
JB/T 7421.1-1994
Quoted Standard
GB/T 17421.1-1998
Regulation (derived from)
NDRC Notice No. 85 of 2006
Issuing agency(ies)
Ministry of Industry and Information Technology
Summary
This standard specifies the milling drilling geometric accuracy and precision inspection requirements and working methods. This standard applies to the maximum hole diameter to 50mm, width from 400mm table face ordinary milling drilling and product variants.