| 摘要 |
The invention discloses a method for making a miniature tri-blade drill structure and a structure of the same, wherein the method includes steps of grinding a metal round post having appropriate dimensions into a raw material of a miniature drill; dividing the raw material into three equal parts, and grinding a drill body using a single grinding wheel to form three waste dismissing grooves having central lines located 120 degrees apart from one another; and grinding a tip of the raw material to form three cutting planes. A miniature tri-blade drill structure manufactured using the aforesaid method is capable of lowering production costs and effectively increasing quality of finished products.
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