... 3m 2.grinder 360 degree free rotating 3.cutting, grinding, milling, drilling and polishing product introduction :1. It can not ... only be used for cutting, grinding, milling, drilling and polishing stones, but also for curve lines processing ... degree±10°grinding curveany in and side curvegriding head rotation speed1440/2880/r/minpower source50Hz-380v SYG-2A/4 cutting and grinding machine