Drills for Metal for Our Daily Use

In drills for metal sometimes embodied invisible to the eye but ingenious solutions that greatly simplify the work and extend the life of equipment. Let’s learn these features in detail. 

Twist drill is the most common type. When we say "drill for metal," we mean in the first place it. They are found in a variety of flavors: thick and thin, cheap and branded, simple and advanced (with a number of improvements). Buy a suitable set of drill bits for metal today is not a problem. And accessories like universal - that is successfully working not only with a variety of steel, cast iron, non-ferrous metals, but also wood, plastic. What made twist drills? They are made of high-speed steel. Therefore, the designation HSS (High-speed steel) in the specification of such equipment is a common occurrence. High speed steel has high red hardness, i.e. retains hardness at extreme heat, and this quality is important for the drilling of metal, because the drill temperature during operation is very high. There are also denote HSS-G (grinding treatment means), HSS-E, HSS- Co (Cobalt content), HSS-R and others. BTW, you can select the HSS hole saws (e.g. 26mm hole saw, 200mm hole saw) at Banggood for high quality and reasonable prices.

The drill for metal usually has a cone shaped tip with two cutting edges, which converge at an angle rather flat (118-135 degrees). Often you can see tip center and the so-called double sharpening, when both of the cutting edges remove an additional facet. Such sharpening reduces friction, which reduces ceteris paribus promotes heating and drilling with less effort.