Import all carbide drill bit, mainly those brands
Cobalt collar, YG, Santak, Kenna and so on, YG cost-effective. Used in the high efficiency, high precision, difficult to processing materials, with the overall hard alloy, with cold or cold.
Domestic is so cheap, why use foreign diamond brand is very good?
Good (maford), Kenna, Thomas, di tex, Sandvik, guhring general in the domestic production, the performance of discount.Recommended by the earth, good performance, high cost of some.The materials they use for cutting tools are generally not for sale. You must understand that.What does it mean when you don't understand it?
Good (maford), Kenna, Thomas, di tex, Sandvik, guhring general in the domestic production, the performance of discount.Now on the market is generally a bit alloy steel material whole bit, although the materials are the same, but due to the processing technology, various brands of product quality disparity. Imported and domestic alloy drills are also very different.Imported alloy bit usually adopts VHM micro grain hard alloy (ISO K40), the type of ultrafine particles (0.6 m) in the application of high performance drill and ordinary milling machine, the hardness and toughness of the ideal together.Take high quality alloy bit surface coating, such as chromium aluminum nitride (AlCrN) coating, the coating layer of coating, the thickness of 4 m, the micro hardness is up to 3200HV, the friction coefficient of 0.35, thermal stability up to 1100 degrees celsius. After coating, the drill color is bluish gray.After coating, the alloy drill can process low alloy steel and high strength steel. High steel can reach 54HRC.
