This part of GB/T 15306 specifies the dimensions of indexable inserts made of ceramic cutting materials with rounded tool tip, fixed hole, 0° normal relief angle, U-level precision. These inserts are primarily clamped on turning and boring tool holders from the top. This standard applies to U-class non-hole indexable inserts made of various ceramic cutting materials. Ceramic cutting materials are composed of various oxides, nitrides, carbides and metals. For example, such ceramic materials are: oxide ceramics (mainly composed of alumina Al2O3), oxide-carbide ceramics (mainly composed of alumina and other materials such as iron carbide TiC ), nitride ceramics (generally composed of silicon nitride Si3 where and other materials such as yttrium oxide 203 and alumina).
GB/T 15306.3-2008 Referenced Document
GB/T 15306.4 Indexable inserts for cutting tools.Ceramic inserts with rounded corners.Part 4:Specifications
GB/T 2075 Classification and application of hard cutting materials for metal removal with defined cutting edges.Designation of the main groups and groups of application
GB/T 2076 Indexable inserts for cutting tools—Designation*, 2021-05-21 Update
GB/T 15306.3-2008 history
2008GB/T 15306.3-2008 Indexable inserts for cutting tools.Ceramic inserts with rounded corners.Part 3: Dimensions of inserts without fixing hole (Class U)
1994GB/T 15306.3-1994 Indexable inserts for cutting tools--Ceramic inserts with rounded corners--Dimensions of inserts without fixing hole(Class U)