... .M. 60HZ for 3900 R.P.M. 8. Spindle speed(fillet corner) : 50HZ for 6700 R.P.M. 60HZ for 8000 ... plate,copper plate 2. man-machine operating interface, choosing with fillet processing or no prcessing 3. Provides the convenience of operation ... to cause machine stopped. 5. with single edge grinding and fillet grinding, quality to ensure safety. 6. time and energy saving ...