Sawing glass is a process that originally comes from the optical industry. Because high-purity, optical glass are usually only available as bar glass, as in the picture on the left. We use a glass saw to cut the blanks, which are then processed in a wide variety of ways.
Glass can be sawed very precisely; Tolerances of a tenth of a millimetre and below are feasible. An application example are sight glasses that are embedded flush in a fitting and therefore have to be not only dimensionally accurate but also perfectly rectangular. The blank for the centreless-grinded part (see centreless grinding) is also cut to size with the glass saw.