(all except usa) for usa inc 60556 canceled replaced by guard, abrasive wheel: inc 42536, fiig a502l. an item usually made of metal which partially encompasses an abrasive wheel on various types of grinders and grinding machines. it may be designed as a spark arrestor and safety measure against broken wheel particles, also as a splash gurad when used with wet type gringing. it may be constructed from a single piece, or assembled from several pieces of metal. see also shield, eye, grinding wheel.