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What is a drill with oil holes? internal coolant supply ？
A drill with an oil hole is a drill that has a hole (= oil hole) through the inside of the drill and can discharge cutting oil from the tip of the drill using the internal coolant supply , which is a specification on the machine tool side.
It can be lubricated directly to the processing point, which is effective in forcibly ejecting chips, cooling the cutting edge, and resisting welding.
As a result, the tool tool life is extended and unexpected breakage is prevented.
It is effective in cases where chip ejection is required, such as in deep hole processing, as well as in cases where cooling and welding resistance are required, such as high-efficiency machining and processing of workpiece materials with low thermal conductivity.