GB/T 6138.2-2007
AbolishedSubland twist drills for holes prior to tapping screw threads - Part 2: The types and dimensions of Subland twist drills with Morse typer shanks
攻丝前钻孔用阶梯麻花钻 第2部分：莫氏锥柄阶梯麻花钻的型式和尺寸
Application Summary AI generated
This standard specifies the types and dimensions of subland twist drills with Morse taper shanks, used for drilling holes prior to tapping screw threads. It is applied in manufacturing and machining industries where precise pre-tap hole dimensions are required, ensuring compatibility with subsequent threading operations. The standard is particularly relevant for tooling design, production quality control, and procurement of specialized drilling tools.
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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.