



Mount wheel on a rod or pencil through arbor hole and tap the side of the grinding wheel (in the positions shown in Figure 4) with a light, non-metallic implement such as the handle of a screwdriver. A sound and undamaged wheel will give a clear tone. If cracked, there will be a dead or dull sound and not a clear ring. If damaged, the wheel should not be used. 7. As the grinding wheel diameter decreases with use, the position of the work rest should be adjusted. Optimally, the distance between t