WEBROSS Laboratory High Shear Mixer 100LSK-I Specifications and Dimensions. STANDARD FEATURES: 3/4 HP drive, 115 volt, 50/60 Hz, single phase, 20 amp motor. Mixer and controls are wired and include a cord and plug. IP55/NEMA 12 motor. Variable speed control from 500-10,000 rpm, +/-2% speed accuracy.