US STM tungsten steel drill bit / drill 1: Material: tungsten steel 2: Hardness: HRC62 ° ± HRC2 ° 3: Length Tolerance: ± 0.05MM 4: Diameter tolerance: + 0.00- 0.01MM 5: high temperature and abrasion features similar products: Japan NACHI high cobalt drill / Taiwan SUS high cobalt drill, 3-5 times higher than the price, the high cost of the W & Y product specifications 0.01MM binned For customized special specifications are welcome to sample plans. negotiations, the figure quoted 1.0MM Product Reference Price Product Name: STM US imports of tungsten steel drill bit of Origin: United States manufacturing and processing objects: for stainless \ high alloy steel and other difficult to cut materials applicable factory: Watches / first plutonium / glasses / stove / locks and other high demand for drilling factory Features: 1: Material: tungsten steel 2: Hardness: HRC62 ° ± HRC2 ° 3: Length Tolerance: ± 0.05MM 4: Diameter tolerance: + 0.00- 0.01MM 5 : characteristics similar products with a high temperature and wear of: Japan NACHI high cobalt drill / Taiwan SUS high cobalt drill, 3-4 times higher than the price, high cost using W & Y Note: Please add enough cutting oil when appropriate, use non-water-soluble cutting oil, reduce the speed. drill material and type 1 is a rotary drill head, cutting ability and tools to end, generally carbon steel SK, or high speed steel SKH2, SKH3 other materials by milling or Rolling and then quenching, heat treatment after grinding is made for metal drilling or other materials on it, it's a very wide range, can be applied to the use of the drill press, lathe, milling machine, hand drills and other machine tools. 2. The drill bit according to the type of structure A. Classification (1) integral drill: drill top, drill body, shank made of the same material as a whole (2) end welded drill, drill bit from the top of carbide welding. a. B. Tenon drill according to classification (1) straight shank drill: drill diameter in ψ13.0mm below, are using the straight shank (2) taper shank drill: drill shank is tapered shape, generally adopt its taper Morse taper C.. According to use classification (1) center drill: generally used to play before drilling the center with the tip cone has 60 °, 75 °, 90 °, etc., when the job in order to use the lathe tailstock support, support should be 60 ° center drilling and lathe tailstock top center 60 ° compatible (2) twist drill: use a drill for the most widely used on industrial manufacturing, we generally use is the twist drill (3) super-hard drill: drilling of the body All to the front or cemented carbide tool material, the material used in the drilling process of (4) drill hole: Drill holes prescribe body, cutting agent after this hole reach the cut edge part, to and chip away the heat, use this drill to work things generally rotates while stationary drill (5) deep drill: the first for the barrel and drilling guarantee of stone, also known as the barrel drill. Deep drill a straight groove, cut a quarter of a tube in part to produce a cutting edge chip (6) Drill Reamer: the need for a large number of production, and its front-end for the drill, the back-end for Reamer, Yu drill diameter and the diameter of a thin reamer reaming of the allowance, but also tapping screw drill in mixed use, it is also known as hybrid drill (7) taper drill: when machining mold inlet, can Use taper drill (8) cylindrical bore drill: we call heavy-cutter, drill the front of such a small part of the diameter of the rod called a road.