Definition of centre bit in English:

centre bit

noun

单词	centre bit
释义	Definition of centre bit in English: centre bit noun A drill bit with a central point and side cutters. Example sentencesExamples A brace with a set of auger bits and a few centre bits and a counter sink are needed for drilling. Flatten the projection with a pass or two of the gouge, then bore a 25 mm diameter hole using a sawtooth centre bit held in the tailstock of the lathe. This illustrates the wide variety of sources for cast steel center bits and other edge tools in the mid-19th century. The bit appears to be a common center bit with a long, necked-down shaft to allow the chips to fall away to the outside of the barrel before the threaded shaft of the spigot reached the barrel. The center bit must be forced into the wood by the user, whereas the auger tends to draw itself into the wood.
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