GB/T 2804-1981 Structural elements of modular fixture components

GB/T 2804-1981 Structural elements of modular fixture components GB/T2804-1981 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China Structural elements of modular fixture components, bolts for grooves Material: M12X1,8 40Cr according to YB6-71 Heat treatment: quenching HRC 35~40 Pretreatment: bluing Bureau issued GB 2804 Proposed by the Third Machine Industry Ministry of the People's Republic of China 3 ~. GB 2804 Implemented on July 1, 1982 301st Research Institute of the Third Machine Industry Ministry Tianjin Institute of Modular Fixtures of the First Machine Industry Ministry 2. T-shaped slot
#+9-21
GB2804-81
T-shaped slot is made of 20CrMnTi steel specified in YB 6-71. M8 series hollow blades = 9 and code = 3 can also be made into corresponding chamfers +3 according to the process conditions. Support section
Square support
22.5×22.5
31×30bZxz.net
60X 60
75×75, 90×9h
Rectangular support
1.8±0.15
10± 1.29
22.5×.3m
30×45
15×60. 5×.
75×112.5.60×12，90×120
5. Shoulder nut
16 +g-m8
GB 2804--81
6. Through hole, countersunk hole*
*Including waist-shaped hole and its countersunk hole.
7. Series threaded hole
H is the screw-in depth: H is the screw hole depth.
GB2804—81
8. Guide groove width
9. Butterfly pattern
GB 2804—B1
15 +g. 04
650 g.319
10, hole axis diameter*
d or force
GB2804—81
dH6 or Hi
*refers to the hole auxiliary diameter and outer diameter of the component with matching accuracy requirements, 36t
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