GB/T 6139-2007
ActiveSubland twist drills - Technical specifications
阶梯麻花钻 技术条件
Application Summary AI generated
GB/T 6139-2007 specifies the technical requirements, dimensions, tolerances, and testing methods for subland twist drills, which are specialized cutting tools with multiple diameters along their length. It is applied in the manufacturing industry for producing stepped holes in metal workpieces, commonly used in automotive, aerospace, and general machining operations where precise, multi-diameter bores are required. The standard ensures interchangeability and performance consistency for these drills in production and quality inspection contexts.
Related Standards
GB/T 6408-2003
Super abrasive--Cubic boron nitride
GB/T 4676-2003
Abrasive grains--Sampling and splitting
GB/T 2492-2003
Bonded abrasive products--Permissible unbalances of grinding wheels as delivered--Testing
GB/T 19323-2003
Coated abrasives--Plain discs with holes for dust extraction
GB/T 19324-2003
Coated abrasives--Plain sheets with holes for dust extraction
GB/T 3045-2003
Abrasive grains--Chemical analysis of silicon carbide
GB/T 3464.2-2003
Long reduced shank taps
GB/T 6087-2003
Key type three-jaw drill chucks
Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.