The line contact on a grinding wheel forms the grinding line, the workpiece lies flush with the regulating wheel and is held in place from below by a guide rail.

• 无心磨削时,工件外圆表面在被加工的同时还被进行引导:与砂轮的线接触形成磨削线,这时工件靠在导轮上,并被支承导轨从下面支持。