Abstract
Fabrication of micro ball end mill using cemented carbide, ceramics, cBN and single crystal sapphire as a tool material was conducted to find out a suitable material in the meaning of generating sharp cutting edge without chips. 5-axis rotary stage was made to fabricate half cut hemispherical tool 0 degree rake and 30 degreed clearance angles. Electroplated diamond tools over #2000 mesh size and resin-bonded diamond wheel #32000 mesh size were used for the fabrication of tool face. It was verified through the experiment that machinability of the cemented carbide was high but the edge did not have an enough toughness to keep the sharp edge. Macinability is low but a feasibility to fabricate sharp cutting edge with superior wear resistance is high when using cBN and PCD as a tool material.
