... 19,999RPM SURFACE SPEED(m/min) 0.05 to 1,999.9(m/min) 0.2 to 6,560ft/min CONTACT TACHOMETERSURFACE ... to 19,999RPMSURFACE SPEED(m/min) 0.05 to 1,999.9(m/min)SURFACE SPEED(ft/min) 0.2 to 6 ... ,560ft/minResolution: CONTACT TACH: 0.1RPM(0.5 to 999.9RPM)1RPM(over 1,000RPM)Surface speed(m/min) 0 ...