Russian Drills
Muted golden color suggests that the holiday was made to remove the metal interior stresses. Bright golden color suggests applying a layer of titanium nitride, which increases strength and reduces the friction of the drill. If the product is gray, it means that additional processing on the hardening of it did not pass. Marking drills for metal marking drills Russian producers depends on the diameter of the product if it is less than 2 mm, marking is not applied, and from 2 to 3 mm – diameter and marked on steel grade and more than 3 mm – in addition to diameter and grade of steel or hard metal plate to indicate the brand of the manufacturer and sometimes – accuracy class drills. Foreign manufacturers not only to celebrate their own marking drills, but also applied to information packaging products.
If you are going to buy this kind of tool, you can see it in the name of the country of manufacture, trademark, manufacturer, steel grade, diameter and length of the drill. Often listed on the product and material, drilling of which he . drills metal to work with other materials, in contrast to many other drills, drill bits for metal, suitable for use not only with this material. At the same time should take into account a number of nuances, not to spoil the workpiece. For example, when working with wood drill bits for metal parts can be applied along the grain and across. oti Sonnenfeld has been very successful. However, the holes can be obtained from inaccurate, "ragged" edges. Only with a special drill bit sharpening cope with the wood as easily as with the metal.
When drilling a hole in the plexiglass can happen another phenomenon – itself fails drill. It happens when, without providing additional cooling auger drills peregrevaetsya.Kachestvo – pledge their life with all the richness of choice, presented at the stores, buy a tool that last a long time, not so simple. It is important to remember that the cheap drill can not be durable, so you should choose only high quality products from reliable producers. These drills are made from high quality Instrumental carbon, alloy or high speed steel, resistant to kinks. For their manufacturing only special one-piece billet. Drill bits for metal, regardless of country of production are marked with the diameter, can be sharpened by hand or by machine. Skilled craftsmen, at work regularly use drills, know all the nuances and is unlikely to be mistaken with a choice drills. But the novice is sense to buy a metal-cutting tools and supplies to him only in specialized shops. There lay people will be able to consult with vendors to get a receipt and a guarantee that purchased products really meet the quality standards.
