GB/T 9204.2-1988 Fixed center precision
Basic Information
Standard ID:
GB/T 9204.2-1988
Standard Name: Fixed center precision
Chinese Name:
固定顶尖 精度
Standard category:National Standard (GB)
state:Abolished
Date of Release1988-05-27
Date of Implementation:1989-01-01
Date of Expiration:2009-02-01
standard classification number
Standard ICS number:Mechanical Manufacturing>>Machine Tool Devices>>25.060.20 Indexing and Tool/Workpiece Holding Devices
Standard Classification Number:Machinery>>Metal Cutting Machine Tools>>J52 Machine Tool Accessories and Accessories
Publication information
other information
Release date:1988-05-27
Review date:2004-10-14
Drafting unit:Yantai Machine Tool Accessories Research Institute
Focal point unit:National Technical Committee for Metal Cutting Machine Tools Standardization
Publishing department:China Machinery Industry Federation
competent authority:China Machinery Industry Federation
Introduction to standards:
GB/T 9204.2-1988 Fixed top precision GB/T9204.2-1988 standard download decompression password: www.bzxz.net
Some standard content:
National Standard of the People's Republic of China
Fixed centre accuracy
Dead centre--Testing of the accuracy1 Subject content and scope of application
This standard specifies the accuracy requirements and testing methods for fixed centres. This standard is applicable to all types of metric and dead centres. 2 Reference standards
GB308 Rolling bearing steel ball
JB2670 General rules for precision inspection of metal cutting machine tools JB1079 Micrometer
3 Precision requirements and inspection
Inspection items
Inspection tools
Inspection method reference
Related clauses of JB 2670
High precision grade (G)
Indicator,
Special tilting inspection fixture, pot ball
60° surface radial runout
Precision grade (M)
UDC 621.9.08
GB 9204.2--88
General
5.6, 1.2, 2 points are on the special inspection fixture. Use the ball to support the tip, and touch the indicator probe straightly to the 60-degree cone surface, and rotate the tip for inspection. The maximum difference of the indicator reading is the radial dynamic error. Approved by the State Machinery Industry Commission on May 12, 1988 and implemented on January 1, 1989
GB9204.2-88
This standard is proposed by the National Metal Cutting Machine Tool Standardization Technical Committee
This standard is approved by the National Metal Cutting Machine Tool Standardization Technical Committee. fwwW.bzxz.Net
This standard was drafted by the Yantai Machine Tool Accessories Research Institute at its own expense. From the date of implementation of this standard, the accuracy of fixed points in B2893-81 shall be used as the standard.
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