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该钻头比标准麻花钻头提高工作效率5～6倍,在钻孔批量较大时,能采用0.9～1.2毫米/转、甚至2毫米/转的大走刀进行快速钻削,尤其是加工脆性材料时,效果更明显。刀具切削部分的主要改进是:磨小月牙槽、减少内刃锋角,加强钻头的定心作用,使三尖能很快地同时切削,孔位不会偏移,避免了月牙槽较大时,在钻削中所产生的定心不稳、钻头发生颤抖的现象。磨窄横刃、缩短横刃长度至原来的1/4～1/5,改变原刮削
The drill bit than the standard twist drill to improve work efficiency of 5 to 6 times, when the drilling volume is large, the use of 0.9 ~ 1.2 mm / rev, or even 2 mm / rev for large drilling fast drilling, especially the processing of brittle materials When the effect is more obvious. The main improvements in the cutting part of the cutter are: grinding the small crescent tooth groove, reducing the inner blade frontal angle, strengthening the centering action of the drill bit so that the tricuspid can cut at the same time quickly, the hole position will not be offset, avoiding the large crescent slot , Resulting in the centering of the drilling instability, bit sharpening phenomenon. Narrow chisel, shortening the chisel length to the original 1/4 ~ 1/5, change the original scraping