5-piece Double-head Center Drill Bit Set

HSS fast steel forging Material: Use high quality HSS fast steel, after strict heat treatment, the quenching hardness is stable, the rigidity is good, the wear resistance is strong and the resistance to demolition is strong. long duration. Exquisite know-how Using a fully automatic sharpening process to ensure that it is fully formed and has stable dimensions. High precision and stable performance. The surface finish is good, beautiful and practical. Cutting Part The hardness of the heat treatment reaches 63-66hrc, the resistance of the teeth is high, the cut is clear and the efficiency of the treatment is high. Exquisite crafts, Fine execution, easy to use Use the HSS fast steel forging, the anti-rust laser scale and wear resistant, high hardness and not easy to Breaking These central drills are used for metal processing and can provide starting holes for larger drills. They can also be used to form tapered notches at the end of the room to install the center of the turn. These central drills are fast steel with high hardness and good wear resistance. There are 5 central drills in the kit, which can be used to drill holes of different sizes. 5-piece double head central drill (1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 4.0 mm) These central drills are widely used in the towers for Cut easily and eliminate the chips smoothly. The positioning and positioning exercises are traditionally used to form a conical hole in the center of a lap in order to provide a starting point for standard helical drills and are intended to prevent the drill from turning. Used to produce parts that need to be processed between central centers or media in the parts. CAUTION When using these drows, the temperature of the materials (for example, metal with low carbon, low carbon steel, aluminum, acrylic plastic , wood, etc.) will be very high. Please add water or coolant to prevent the temperature from rising. Do not smoke when using the product.