GB/T 4169.2-1984 Plastic injection mold parts straight guide bushings

GB/T 4169.2-1984 Plastic injection mold parts straight guide sleeve GB/T4169.2-1984 standard download decompression password: www.bzxz.net

Marking example,
National Standard of the People's Republic of China
Plastic injection mold parts
Straight guide bushings
Components of lajecton modd for plastics--Stralght gudde bushes
True guide bushing of d=12, L=32:
Guide bushing*12×32
GB4169.2—84
When the material is 20 steel:
Guide bushing Φ12×32-20 steel.GB4169.2—84d (H7)
Basic sizewwW.bzxz.Net
Limit deviation
+0,030
d, (n6)
Basic size
National Bureau of Standards 1984-02-27
Limited difference
d, (e7)
Basic size
About limit deviation
UDC 621.725.29
GH 4169.2—84
Other 5
1985-01-01 implementation
GB 41*.2——84
Material: T8AGB1298-77/20 steel GB699—65. Technical conditions:
a. Heat treatment HRC50~5520 steel base 0.5~0.8 hardening HRC56~60. b. The geometric tolerance values ​​marked in the figure are in accordance with Appendix 1 of GB1184--80 "Provisions for Unmarked Tolerances for Shape and Position Tolerances", and t is Grade 6.
c, d and d, the dimensional tolerances can be changed within the same tolerance grade according to the use requirements. d. The chamfer shown in the figure is not greater than 0.5×45°
e, and the others are in accordance with GB4170-84.
Additional Notes:
This standard was proposed by the Ministry of Machinery Industry of the People's Republic of China and is under the jurisdiction of the Guilin Electric Science Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Guilin Electric Science Research Institute of the Ministry of Machinery Industry, the Gonghai Plastic Products Mould Factory of the Ministry of Light Industry, the Chongqing Radio Factory of the Ministry of Electronics Industry, the Shanghai Spark Mould General Factory of Shanghai, the Beijing Qingyun Instrument Factory of the Ministry of Aviation Industry, and the Taiyuan Weidong Chemical Factory of the Ministry of Ordnance Industry. The main drafters of this standard are Zhang Ansheng, Zhao Yunjie, Yang Chengxin, Zhu, Wei Min, and Wu Zhengyuan.
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