Rated Voltage 220V/50HZ Rated Input Power 170W Power Output 100W Amperage 0.7A No-load Speed 2840r/min Diameter of grinding disc 125/125mm 5″/5″ Bore diameter of grinding disc 12.7/32mm 1/2″ 1-17/64″ Thickness of grinding disc 16/16mm 5/8″/ 5/8″ Spindle Thread M12 1/2″-9 Weight 5kg Safety Class I Sound Pressure 75.8 dB(A) Acoustic Power 86.8 dB(A) Weighted Vibration 35M/s²