PCB drilling with a drill

The so-called carbide to tungsten carbide face as the substrate, cobalt powder as a binder by pressing and sintering. High precision positioning, do not causative drill sleeve. But the toughness is poor, very brittle, in order to improve the performance of cemented carbide, and some use carbide substrate in a chemical vapor deposition on a layer of 5-7 micron titanium carbide special hardware (TIC) or titanium nitride (TIN), to have a higher hardness. Carbide drill ultra fine particles, which equality of tungsten carbide grain size of the phase 1 micron or less. To save costs using welding shank drill now better structure, the original carbide drill bit for the wet diamond polishing pads  group are now back with a stainless steel drill shank, cost greatly diminished, but not the same as the material used and its dynamic concentricity than but groups carbide drill, surprisingly in the small diameter side. In the range of the flute length, diameter of the drill is an inverted cone, with the hole when drilling wall friction is small, high quality drilling. In the actual causative process can be based on the need to use. This drill is not only high hardness and compressive and flexural strength are increased. There's a physical way to the top of the drill generate a diamond film, a great increase of hardness and wear resistance of the drill. Some of the ion infusion techniques, titanium, nitrogen, and carbon, the matrix perfusion certain depth, Bu Wei and increase the hardness and strength of the drill components Regrinding can move into the perfusion. Large helix angle, chip speed, suitable for high-speed grinding. Because of its hardness, slender, very wearable, a certain strength, suitable for high-speed grinding. Straight shank twist drill mostly for single head machines, PCB drilling relatively simple or single panel, now in a large circuit board manufacturing plant has been rarely seen, its drilling depth of up to 10 times the diameter of the drill.
1, to choose a good brand guarantee product quality
PCB drilling with a drill ordinary carbide are used as carbide drill bits  ring oxygen glass cloth complex copper plate wear on cutting surprisingly fast. Common drill shank diameter of 3.00mm and 3.175mm. Most of the manufacturers causative holds many lessons for digital control drilling machine, numerical control drilling causative is fixed shank carbide drill bit, which is characterized by semi-automatic Gaiyi drill can be implemented. Usually with WC 94 one hundred percent, one hundred percent cobalt 6. Holds many lessons, many drill manufacturers, sub-national and imported.
2, pay attention to the material of drill
PCB drilling with a drill with straight shank twist drill, twist drill set and fixed shank shank Spade (undercut) drill bit.
Optional digital control drilling drill approach:
3, to understand the drill category and characteristics.
Domestic products and foreign products dwarf slight gap between the price of course, but also slightly more expensive imports, the market also has production from Taiwan and Hong Kong, as well as part of the production in Taiwan to fight the U.S. and European brands of drills, contrast causative Europe, America and Japan the quality and stability of the  concrete cutting drill imports, although the price is slightly expensive but good value for money for the craft members who, in the course of the actual causative drill quality problems that occur because of a handful of chances, such as the production of products require a higher import causative proposed drill, drill Europe and America high hardness and Japan softer, Europe drill rather break than bend causative of migraine-prone holes but could not help but break the higher the probability that Japan is better flexibility drill holes prone to easy to break, but missed the odd side is a small drill hole. Carbide hardness and strength, not only the ratio of cobalt and tungsten carbide and related particles are also associated with the face. Laminated substrate is not high in the case, causative drill sleeve can avoid drilling biased.