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做螺丝孔用什么钻头

更新时间: 2021-06-13 13:05:28     

1、普通粗牙螺纹螺距0.7,钻头用直径3.3MM钻头。

2、普通细牙螺纹螺距0.5,钻头用直径3.5MM钻头。

3、JB/T9987使用于GB/192~193和GB196~1970.7;一般用麻花钻(麻花钻是从实体材料上加工出孔的刀具,又是孔加工刀具中应用最广的刀具)。

关键词: 螺丝 什么 钻头

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