HSS straight shank twist cobalt-containing drill bits TOTAL LENGTH: 34-205MM Specification: 1-20MM BLADE LENGTH: 3-140MM BLADE DIAMETER: 34-140MM

Category: Straight shank twist drill The material of high-speed steel drill bit is a material with high hardness, high wear resistance and high heat resistance, and the production process of high-speed steel is very complex and the production quality is very high.

Because of its strong hardness, good toughness, and moderate fit, it is often used to make metal cutting tools, and high-speed steel drill bits are one. Tungsten carbide drill bits are harder than high-speed steel, the materials that can be beaten are harder, and the price is relatively high, but there is a fatal disadvantage that the hardness is too great, so it is easy to break. The general tool steel also belongs to alloy steel, most of which are iron-carbon alloys, and high-speed steel is also divided into ordinary high-speed steel and high-quality high-speed steel, and the common grade is W18Gr4V.

The reason why the use of high-speed steel drill bits has become more and more widespread in recent years is that it has better toughness than the common carbon tool steel on the market, not only its strength, heat resistance, and cutting speed is much higher than that of carbon tool steel (iron-carbon alloy), and its name "high-speed steel" also comes from this. In comparison, although the efficiency of cemented carbide drill bits, which is also alloy drill bits, is higher, the economy of high-speed steel drill bits is stronger