GB/T 2861.2-1990 Type B guide pins for die guides

GB/T 2861.2-1990 B-type guide pin for die guide device GB/T2861.2-1990 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Guide pillars, type B
Subject content and scope of application
GB/T 2861.2--90
Replaces GB2861.2--81
This standard specifies the materials, heat treatment, technical conditions, structural types and specifications of guide pillars of type B for die guide devices. This standard is applicable to die sliding guide mold bases. Reference standards
GB/T12446 Technical conditions for die mold base parts GB699 Technical conditions for high-quality carbon structural steel
3 Materials, heat treatment, technical conditions, structural types and specifications of guide pillars 3.1 Material: 20 steel GB 699.
3.2 Heat treatment: carburizing depth 0.8~1.2mm, hardness HRC58~62. 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 96
Implementation on May 1, 1991
3.5 Marking examples
GB/T2861.2--90www.bzxz.net
Others6.3
GB145- H5
R* shall be determined by the manufacturer.
B-type guide column with diameter d=20mm, limit deviation h5, length L=120mm, (=30mm: Guide column B20h5×120×30GB/T2861.297
Basic dimensions
GB/T 2861.2—90
d,(r6)
Basic dimensions
Limit deviation
Basic dimensions
(h5）
GB/T 2861.2-90
d,(r6)
Limit deviation
Basic dimensions
Basic dimensions
(h6）
GB/T 2861.2--90
d,(r6)
Basic dimensions
Limit deviation
Basic dimensions
GB/T2861.290
d,(r6)
Basic dimensions
Note: When this type of guide pin is used, the limit deviation of the mounting hole of the lower die seat is H7. Limit deviation
GB/T2861.2--90
Additional instructions:
This standard is 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 Mold Standardization. This standard was drafted by the Mold Branch of Guilin Electric Science Research Institute of the Ministry of Machinery and Electronics Industry. The main drafters of this standard are Wang Huachang and Qin Guangwei. This standard is entrusted to the Mold Branch of Guilin Electric Science Research Institute of the Ministry of Machinery and Electronics Industry for interpretation. 102
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