Drilling tool with hardened head - is formed as forward tapered truncated cone with grooves for removal of waste

摘要

The drill has a head formed of a hard wearing material (3). The head is shaped as a forward tapering truncated cone. Drilling lubricant is supplied via an internal opening (7). - Waste lubricant and waste material is carried to the rear along channels (5, 5a, 5b, 6, 6a, 6b). To ensure even working on the drilling face, at least one of the channels (5, 6) must align with the drilling axis.