There Are A Variety Of Different Drill Bits For Metal

Drill bits for metal can be found for just about every application, from simple bits for drilling into sheet metal on home projects, and specialized cobalt coated bits for drilling into hardened and heat treated metals. Knowing which drill bits for metal fabricating are the most efficient comes with years on the job, and training.Most large milling and machining companies use only a certain brand of drill bits. This is mainly because they have performed well in constant drilling situations and because they are of a higher quality, which allows their machinists to resharpen them, giving them a longer life. Choosing the right drill bits for metal fabrication is very important, especially when the work piece is large, or requires a precise drilling angel. For most large drilling applications, an end mill or vertical lathe is usually used for full control while drilling. Trained workers usually do the drilling as it requires some skill and know how to get perfect results every time. Many businesses can't afford to have their projects running late or over budget as a result of drilling errors and thus ensure that the people responsible are trained and experienced.  Sometimes in high heat situations a drilling lubricant is used to prevent premature drill bit failure or breakage, and to ensure that the part being drilled is not damaged or cracked. Some metals such as bronze and other non ferrous metals can become discolored from the heat of drilling, making it necessary for constant lubrication. Cobalt bits are considered the choice drill bit for hardened metals and where high temperatures are created from drilling into stainless steel. If a large hole is required, the part will be secured in a jig for stepped drilling until the required diameter is met. The downside to cobalt drill bits is their coating make then a bit brittle. Zirconium coated drill bits offer extended drilling power where HSS bits would likely fail. The zirconium nitride coated drill bit decreases friction and makes precision drilling projects easier to approach.Solid carbide drills are perfect for most common metal drilling applications, but these drill bits can not handle hardened metals and some heat treated steel. They are good for general drilling and work well on non ferrous metals. Titanium drill bits stand up well to heat and their coatings help to dissipate heat build up faster than most other drill bits, but overall the are a bit expensive and do not have the long life of cobalt bits.There are some specialty drill bits for metal working, like the rolling cutter drill bit. This bit has an improved thrust face bearing structure that uses at least 2 different bearing metals for increased precision in high heating situations where single cobalt coated drill bits for metal would fail.