JB/T 8005.2-1999 Machine tool fixture parts and components screw-in threaded bushings

JB/T 8005.2-1999 This standard is a revision of JB/T 8005.2-95 "Screw-in threaded bushings 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 screw-in threaded bushings with thread specifications of M8 to M36 and trapezoidal thread specifications of Tr16×4 left to Tr36×6 left. This standard was first issued in 1981 as GB 2159-80, first revised to GB/T 2159-91 on April 30, 1991, and adjusted to JB/T 8005.2-95 in April 1996. JB/T 8005.2-1999 Screw-in threaded bushings for machine tool fixture parts and components JB/T8005.2-1999 Standard download decompression password: www.bzxz.net

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Mechanical Industry Standard of the People's Republic of China
The parts and units of jigs and fixtures
The parts and units of jigs and fixtures1999-08-06Promulgated
State Machinery Industry Bureau
Implementation on 2000-01-01
Mechanical Industry Standard of the People's Republic of China
Parts and units of jigs and fixturesRotation-inthreaded bush
JB/T8005.2—1999
Replaces JB/T8005.2—1995
This standard specifies the traveler-type threaded bushing with ordinary thread specifications of M8~M36 and trapezoidal thread specifications of Tr16×4left~Tr36×6left.
2 Referenced standards
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/T65—1985
GB/T 699-1988
JB/T8044—1999
3 Dimensions
Slotted cylindrical head screws
Technical conditions for high-quality carbon structural steel
Technical requirements for machine tool fixture parts and components
The dimensions are shown in the following figure and table.
Number of screws M6×12
GB/T65
Approved by the State Machinery Industry Bureau on 1999-08-0624
Implemented on 2000-01-01
Ordinary thread
Trapezoidal thread
Tr16×4 left
Tr20×4 left
Tr24×5 left
Tr30×6 left
Tr36×6 left
4Technical conditions
M24×2
M30×2
M36×3
M42×3
M48×3
JB/T 8005.2—1999
4.1 Material: 45 steel in accordance with GB/T699. 4.2 Heat treatment: 35~40HRC.
4.3 Other technical conditions in accordance with JB/T8044. 5 Marking
5.1 Marking example:
d-M16, H=32mm screw-in threaded bushing: bushing M16×32JB/T8005.21999
dTr16x4, H=32.mm screw-in threaded bushing: bushing Tr16×4×32JB/T8005.2—1999Basic size
Limit deviation
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