JB/T 2956.1-1999 This standard is a revision of JB 2956.1-85 "Sintered corundum grinding wheel". According to the requirements of GB/T 2484-1994 "Code and Marking of Common Abrasives", the shape code and size marking of the grinding wheel are modified, and the cup-shaped and single-sided concave grinding wheels that are no longer used are cancelled. Other technical contents have not changed. This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of sintered corundum grinding wheels. This standard is applicable to sintered corundum grinding wheels with an outer diameter of 30~125mm. This standard was first issued on September 3, 1985. JB/T 2956.1-1999 Common Abrasives Sintered Corundum Grinding Wheel JB/T2956.1-1999 Standard download decompression password: www.bzxz.net