| The SG-60 & SG-70 also feature powered rotation, but at much slower speeds. The two options are 8 rpm-40 rpm, and 35 rpm-165 rpm. Slower rotation speeds increase dwell time and depth of penetration which has been proven to aid removal of thick deposits, particularly at long standoff distances. The SG-60 is air-powered and the SG-70 uses a hydraulic motor. |