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Database: 189759 (12 Oct 2025)
JB/T 3870.1-2019 English PDF
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JB/T 3870.1-2019
: Calipers grinding machines -- Part 1: Testing of the accuracy
Status: Valid
JB/T 3870.1: Evolution and historical versions
Standard ID
Contents [version]
USD
STEP2
[PDF] delivered in
Standard Title (Description)
Status
PDF
JB/T 3870.1-2019
English
279
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3 days [Need to translate]
Calipers grinding machines -- Part 1: Testing of the accuracy
Valid
JB/T 3870.1-2019
JB/T 3870.1-1999
English
319
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Calipers grinding machine Accuracy inspection
Obsolete
JB/T 3870.1-1999
JB 3870-1985
English
359
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3 days [Need to translate]
(Precision calipers grinder)
Obsolete
JB 3870-1985
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Basic data
Standard ID
JB/T 3870.1-2019 (JB/T3870.1-2019)
Description (Translated English)
Calipers grinding machines -- Part 1: Testing of the accuracy
Sector / Industry
Mechanical & Machinery Industry Standard (Recommended)
Classification of Chinese Standard
J55
Classification of International Standard
025.080.50
Word Count Estimation
12,140
Date of Issue
2019-05-02
Date of Implementation
2020-01-01
Older Standard (superseded by this standard)
JB/T 3870.1-1999
Quoted Standard
GB/T 17421.1-1998
Regulation (derived from)
Natural Resources Department Announcement No. 7 of 2019
Issuing agency(ies)
Ministry of Industry and Information Technology
Summary
This standard specifies the geometric accuracy and working accuracy requirements, inspection methods and corresponding tolerances of caliper grinders. This section applies to caliper grinders (hereinafter referred to as machine tools) of ordinary precision and precision grades with a maximum grinding caliper size of 250mm��800mm.