Chinese Standard: GB/T 6078-2016

Centre drills

MOD  ISO 866:1975;ISO 2540:1973;ISO 2541:1972

全国刀具标准化技术委员会(SAC/TC 91)

本标准规定了中心钻型式和尺寸、技术要求、标记及包装等基本要求。

本标准适用于加工GB/T 145中A型、B型、R型中心孔的中心钻。

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