BORING RISER HOLES IN A GRAPHITE MOLD

摘要

A drill press is provided that is specially adapted for drilling openings in to a cylindrical block. The cylindrical block is placed on an indexing plate that is circular and capable of rotational movement on the drill press table around the center axis of the cylindrical block and indexing plate. An indexing plate support is used to help precisely rotate t he indexing plate. The drill press can drill a plurality of openings through the cylindrical block at the same radial distance from the center axis of the block without need to move the drill spindle.