JB/T 1988-1977 Thin-walled pipe bushings

JB/T 1988-1977 Thin-walled pipe bushing JB/T1988-1977 Standard download decompression password: www.bzxz.net

Standard of the First Machinery Industry Ministry of the People's Republic of China
Thin-walled pipe bushing
Marking example: Thin-walled pipe bushing with d of 12mn: Bushing 12JB1988-77
Issued by the First Machinery Industry Ministry of the People's Republic of China
Proposed by the Standardization Institute of the First Machinery Industry MinistryJB1988-
All√3
May 1, 1977
Shanghai Mechanical and Electrical Design Institute
Drafted by Chongqing Heavy Duty Automobile Research Institute and otherswwW.bzxz.Net
Dalian Combined Machine Tool Research Institute
Total 2 Page 2
Pipe outer diameter
Pipe inner diameter
JB 1988-77
1. The material of rolled thin steel plate (GB708-65) for steel bushing is A3F. Copper bushings are made of cold-rolled brass sheet (YB460-64) and are rolled in H62. Other materials can be selected according to the use conditions, which shall be agreed upon by both parties when placing an order.
2. The bushing is in a free state when supplied. After being pressed into the pipe end, the dimensions d and 6 must be guaranteed. 3. Technical conditions shall comply with the provisions of JB1989--77. 90
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