This report deals with drilling conditions to obtain smaller crack size when through-hole drilling soda-lime glass substrate of a thickness of 2.8mm using an electroplated diamond tool with a diameter of 1mm equipped chip pockets. The drilling conditions of a feed speed of 1mm/min and a mesh size of #600 bring out the crack size of 0.1mm or less. However, the size increases with drilling numbers due to the adhesion of chips.
