A good trim saw is a basic piece of equipment for every glass and lapidary artist.  Whether you are going to make a cabochon, a flat specimen for mounting, a faceted stone, or slicing glass for a unique piece, you will want to reduce your material to a workable, and approximate shape before proceeding to the grinding, sanding and polishing operations.  It is fundamental that the trim saw be extremely sturdy, that the saw arbor be mounted with precision and the bearings sealed against intrusion of abrasive waste.  It is essential to have ample cutting deck space and a tank that is easily cleaned