H 6 Pieces Drill Bit Hexagonal Shank Drill M3-m10 Thread Screw Tap

H About this item. 6 sizes: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5. 6 steel bits, suitable for drilling wood, plastic, fine copper, aluminum and other soft metals (5-6mm), not for hard materials (eg sheet steel). Convenient fittings, 1/4 inch hex shank, quick and easy change. Self-centering point, does not require any assistance to pierce or punch the center. Drilling and tapping at the same time, machining in one step. Considerably reduce processing steps, save time and improve work efficiency. When drilling a hole, water must be injected at the same time to cool the drill. This will help you increase the value of the tutorials. If it is not possible to cool the drill bit while drilling, the drilling speed should not be too high and you should not drill too frequently. The composite tap is preferably used on a bench drill or a tapping machine. The thickness of the part is less than 5 mm. When in use, the lubricant is applied to the tap. If you use the hand drill, the thickness should be less than 2 mm, otherwise the tap will break easily (because the hand drill cannot always be operated vertically at constant speed). See more details.