uxcell Twist Drill Bit Set 3mm 4mm, HSS (High Speed Steel) 4341 Titanium
Nitride Coated Straight Round Shank Drilling Tool, for Stainless Steel Alloy Copper, 10pcsUSD $9.99
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- Twist Drill Bit: Cutting edge diameter: 3mm / 0.12", 4mm / 0.16", cutting edge length: 27mm / 1.06", 44mm / 1.73". Features high hardness, good toughness, high wear resistance, suitable for most general purpose applications.
- Wide Applications: Widely used for drilling stainless steel, aluminum alloy, iron, copper, wood and plastic. Used on electric hand drill, drilling machine and bench drill. Drill metal with high hardness or foreign substance, the rotational speed should be slower than normal drilling.
- Sharp Spiral Flutes: Provide neat and smooth cuts. High cutting edge strength, fast cutting speed. Spiral groove facilitates the export of metal chip, saving time and effort in operation.
- Titanium Nitride Coating: Gold titanium and black nitride dual coating can apply lubricant better for smoother drilling and is more durable and corrosion resistant than the regular black surface.
- Tips: Suitable lubricant is conducive to cutting or cooling, making cutting easier and improving smoothness and dimensional accuracy. When using hand-held electric drill, the recommended speed is 100-1000rpm/min; the larger the drilling diameter, the slower the drilling speed.
- Color: Gold Tone
- Weight: 0.000625
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