JB/T 8026.2-1999 Top pressure support for machine tool fixture parts and components

JB/T 8026.2-1999 This standard is a revision of JB/T 8026.2-95 "Top pressure supports for machine tool fixture parts and components". During the revision, only editorial changes were made according to relevant regulations, and the technical content remained unchanged. This standard specifies top pressure supports with trapezoidal thread specifications of Tr16×4 left to Tr36×6 left. This standard was first issued in 1981 as GB 2228-80, first revised to GB/T 2228-91 on April 30, 1991, and adjusted to JB/T 8026.2-95 in April 1996. JB/T 8026.2-1999 Top pressure supports for machine tool fixture parts and components JB/T8026.2-1999 Standard download decompression password: www.bzxz.net

ICS 25. 080. 01www.bzxz.net
Standard of the Machinery Industry of the People's Republic of China
The parts and units of jigs and fixtures
The parts and units of jigs and fixtures1999-08-06Published
State Machinery Industry Bureau
Implemented on 2000-01-01
Standard of the Machinery Industry of the People's Republic of China
The parts and units of jigs and fixturesAdjustable supporting bolta
This standard specifies the thread specifications of bolts with a profile of T16X4 left to T36X6 square. Reference Standards
JB/T8026.2—1999
JB/T8026.2—1995
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T6991988 Technical conditions for high-quality carbon structural steel Technical requirements for machine tool fixture parts and components
JB/T8044—1999
3 Dimensions
The dimensions are shown in the following figure and table.
Approved by the State Bureau of Machinery Industry on August 6, 1999 186
Implemented on January 1, 2000
Tr16×4 left
Tr20x4 left
Tr24×5 left
Tr30×6 left
Tr36×6 left
4 Technical conditions
Limit deviation
4.1 Material: 45 steel according to the provisions of GB/T699. 4.2 Heat treatment: 40~45HRC.
4.3 Other technical conditions shall be in accordance with the provisions of JB/T8044. 5 Marking
5.1 Marking example:
d-Tr16×4 left, L=65mm pressure bearing: JB/T8026.2-1999
Support Tr16×4 left×65JB/T8026.21999D,s
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