Tungsten Carbide Three-flute Drill

Tungsten carbide three-flute drill is also called core drill, which has three symmetrical flutes and mainly used in gray cast iron, ductile iron, malleable iron, aluminum, magnesium alloys and other short-chipping materials core drilling. It has many advantages, such as:
1. The drill bit has better self-centering capability, do not need additional positional hole;
2. It’s suitable for drilling solid workpiece and obtaining high dimensional accuracy and surface quality;
3. It has open groove, compact design and high process reliability;
4. It has high feeding rate and longer service life, which is suitable for harsh working conditions, such as oblique cuts and intermittent drilling.

Compared single-blade, double-edged drill, it has many advantages:
1. High feeding rate: Although is has small chip flutes, it can be good at breaking chips and discharging smoothly in the processing steel after optimization, which has 1.5-2 times higher than double-edged drill in feeding rate;
2. High accuracy: Three-flute drill with 120 ° aliquots edge design to achieve a stable process, during drilling effectively inhibited the aperture change by the vibration generated from the initial processing to the limit during the life of the tool ensures stable aperture;
3. Reduce the hardening process: The amount of feed per rotating and work hardening and work hardening layer is proportional to the depth. When the same amount of feed per revolution, compared with the traditional two-edged drill bit, three-flute drill bit less feed per edge, hardening reduced. 

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