GB/T 2861.7-1990 Die guide device B-type guide sleeve

GB/T 2861.7-1990 Die guide device B-type guide sleeve GB/T2861.7-1990 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Guide unit for press tools
Guide bushes, type B
Subject content and scope of application
GB/T 2861.7—90
Replaces GB 2861.7-81
This standard specifies the materials, heat treatment, technical conditions, structural types and specifications of guide bushes of type B for press guide units. This standard applies to slide guide die frames for press dies. Reference standards
GB/T12446 Technical conditions for die frame parts GB699 Technical conditions for high-quality carbon structural steel
3 Materials, heat treatment, technical conditions, structural types and specifications of guide bushes 3.1 Material: 20 steel GB 699.
3.2 Heat treatment: carburizing depth 0.8~1.2mm, hardness HRC58~62. 3.3 Technical conditions are in accordance with 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 110
Implementation on May 1, 1991
3.5 Marking example
GB/T2861.7—90
R*Determined by the manufacturer.
B-type guide bushing with diameter d=20mm, limit deviation H6, length L=70mm, H=28mm: Guide bushing B20H6×70×28GB/T2861.7
Basic dimensions
Limit deviation
GB /T 2861.7-90
Basic dimensions
Limit deviation
Basic dimensions
Limit deviation
Note: The oil condition and size are determined by the manufacturer. GB/T 2861.7-8D
Basic dimensions
Limit deviation
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Additional instructions:
GB/T2861.7—90
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 Mould Standardization. This standard was drafted by the Mould 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 Mould Branch of Guilin Electric Science Research Institute of the Ministry of Machinery and Electronics Industry for interpretation.
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