This standard specifies the machining allowances and tolerances for free forgings such as discs with holes. This standard is applicable to free forgings of disc type with holes whose dimensions meet the requirements of 0.1D≤H≤1.5D and d≤0.5D.
GB/T 15826.3-1995 history
2008GB/T 21470-2008 Machining allowances and tolerances for steel open die forgings on hammer.Disks,columns,rings and seamless cylindrical sleeves
1995GB/T 15826.3-1995 Machining allowances and tolerances for steel open die forgings on hammer--Disks with holes
GB/T 15826.3-1995 Machining allowances and tolerances for steel open die forgings on hammer--Disks with holes was changed to GB/T 21470-2008 Machining allowances and tolerances for steel open die forgings on hammer.Disks,columns,rings and seamless cylindrical sleeves.