How to distinguish the use of flat bottomed drills and end mills in the processing of spot facers?

Flat bottomed drills and end mills have flat corners on the top shape. I don't know if everyone has carefully compared the top of these two tools. Relatively speaking, the top of a flat drill is completely flat, while the top part of an end mill is designed to be slightly recessed.

Therefore, a flat bottom drill can not only complete ordinary blind hole processing, but also spot facer processing. If an end mill is used for machining, there will be a small protrusion on the bottom surface of the non penetrating hole.

2. So flat bottomed drills have better performance, right?

It cannot be said who has better performance. Although the flat bottom drill is similar in appearance to the end milling cutter, as a tool, it is still a drill bit and can only be used as a fixed size hole for processing. Therefore, if you want to process different hole spot facers, you need to prepare drill bits of different sizes. The end milling cutter can process holes of different sizes through a spiral machining method without the need to prepare other machining tools. In addition to using flat bottom hole machining, determining the type of machining to be completed is more important than the material of the workpiece.

machining

Due to the use of flat bottomed drills, the boring process of using end milling cutters in the past has saved time and improved tool life by increasing feed rate.