Electric file series makita 90xx power 500 watt weight 15 kg dust extraction power supply mains operation functions filing polishing grinding operating voltage 230 v belt measurement 533 x 9 mm belt speed 1 700 mmin dimensions 420 x 158 x 78 mm belt speed 300 1700 mmin plung depth 110 mm belt size l x w 533 x 9 mm dust extractor connection mm 17 mm