GB/T 2861.8-1990 C-type guide sleeve for die guides

GB/T 2861.8-1990 C-type guide sleeve for punch guide device GB/T2861.8-1990 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Guide bushes, type C
Subject content and scope of application
GB/T 2861.8—90
Replaces GB2861.8—81
This standard specifies the materials, heat treatment, technical conditions, structural types and specifications of C-type guide bushes for die guide devices. This standard is applicable to die rolling guide die sets. 2 Reference standards
GB/T12446
Technical conditions for die set parts
Technical conditions for YB9 chrome bearing steel
Materials, heat treatment, technical conditions, structural types and specifications of guide bushes 3
3.1 Material: GCr15 YB 9.
3.2 Heat treatment: hardness HRC62~66.
3.3 Technical conditions shall comply with the provisions of GB/T12446. 3.4 Structural types and specifications are shown in the figure and table.
Approved by the State Administration of Technical Supervision on July 23, 1990, implemented on May 1, 1991
GB/T 2861.8-90
R*Electrical Manufacturing Advertisement Decision.
3.5 Marking example:
C-type guide sleeve with diameter d=28mm, length L=100mm, H=38mm: Guide sleeve C 28× 100 ×38 GB/T 2861.816
Other 6.3
Basic dimensions
Basic dimensions
GB/T 2861.8--90
D (m5)
Matching requirementswwW.bzxz.Net
Matching with C-type guide
column should
have 0.01
interference
Additional instructions:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Mould Standardization. Limit deviation
This standard was drafted by the Mould Branch of Guilin Electrical Science Research Institute of the Ministry of Machinery and Electronics Industry. The main drafters of this standard are Wang Huachang and Qin Guangwei. 3
This standard is entrusted to the Mold Branch of Guilin Electrical Science Research Institute of the Ministry of Machinery and Electronics Industry to interpret. 5
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