Center drill bits are used to provide a starting hole for a larger-sized drill bit or to make a conical indentation in the end of a work piece in which to mount a lathe centre. They are available in metric sizes or BS (British Standard) sizes. The centre drills are all double ended and are made up by a body and pilot at either end.
When used as a lathe centre, they provide a location for a (live, dead, or driven) center to locate the part about an axis. When used as a drill centre, they ensure the drill enters the work piece and does not wander, therefor creating an inaccurate hole. Buy metric centre drills and BS centre drills from Cutwel today online for the best prices and next day delivery.
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