The picture is a steel part of HRC 62 degrees. Let's take a look at the effect after drilling using a CNC drilling machine.

The customer is making parts for the engine, and then needs this product to punch holes in the center of the cylinder. Because the cylinder is welded into it through this hole, it is afraid of loosening, so it is necessary to punch a pin positioning hole in the center of both of them. At present, we use CNC drilling machine, drilling 5 mm aperture, drilling 7 mm depth, it takes 15 seconds to a hole, you can see the effect.

Source of this article: http://www.duomicnc.com/