DESCRIPTION: Grinding plate 150 mm / 6?. Operating pressure: 6.2 bar / 90 psi. Air requirement: 550 l/min / 19 cfm. Working stroke: 5 mm / 3/16?. Speed (RPM): 12000 rpm. Weight: 1 kg / 2.2 lbs. Vibration: Surface grinding: 3.85 m/s. Uncertainty of measurement K0.87 m/s. Noise emission: Sound pressure level: 87 dB(A). Sound power level (LwA): 98 dB(A). Uncertainty of measurement K3 dB(A).