Disc Diameter- 350mm. Disc bore- 40 mm. Disc Speed – 2800 RPM. Polish paper Disc size – Diameter 350mm X 40mm hole. Disc Drive motor – 2 HP 3 phase 440v 50 Hz. Suction Blower – 1 HP 3 phase 440V 50Hz. Input Power – 440 V 3 phase, 50Hz AC