How to Choose a Drill for Metal

A good drill for metal is able to drill a lot of holes in the hardest materials prior to the expiration of its service life, thus it should not blunt and, especially, go wrong. Such can be achieved by performance of the drill only if it is properly matched by the drilled material is ground is necessarily produced and qualitatively.

Make sure that the drill is made of a special high-speed steel drill of only this material can retain its properties at extremely high temperatures encountered in drilling location. High speed steel necessarily contains molybdenum and tungsten, which provides it superior durability.

When you select a drill for metal, note its color. The cheapest are gray drill, they are made ​​of ordinary steel such drills is very short-lived, and some varieties of steel they simply cannot cope. Black drills get their color due to additional treatment with superheated steam, they much stronger than usual. The best drills are carbide drill bits, coated with a rich golden color. This color drill means that it is covered with titanium nitride, which gives it the highest durability. Drilling such a tool will be much easier and faster, but its price is higher.

When choosing a drill you need to know what size hole you want to drill. For sure the drill diameter is given, and therefore the diameter of the resulting hole with it. Make sure that the mark begins with the letter P - it will mean that the drill bit made ​​of high speed steel. Since the drill for metal are usually made ​​of titanium, cobalt or tungsten alloys, it is necessarily reflected in the marking. BTW, you can buy the electronic tools or accessories (e.g. nibbler drill attachment) at Banggood for high quality and reasonable prices.

The quality and cutting speed is affected not only the material from which the drill bit is made, but the quality sharpening it. Only a well sharpened drill bit is able to cope with the metal, low-quality drill very fast, very cheap - after the first drilling.