Basic parameter: Size: 65 x 258mm ( Body diameter:65mm; Length:258mm) Speed Ways: Through 3-phase output inverter and adjust the inverter frequency to change the spindle speed. Cooling: Air cooling Power Interface: Optional H17-4 pins waterproof air plug. The air plug marked "1 ","2"," 3"," 4", "1 ","2 ","3" were connected to inverter (U, V, W), 4 connected inverter ground.(Pay attention! our spindle "4" connecting to GND,promised personal safety!!) Power: 1.5kw (1HP=0.735kw) Voltage: 110v AC Current: 12A Frequency: 0-400Hz Speed: 0-24000rpm Runout Off: 0.01mm Bearing Type: 2X7004 P4 DT and 2X7000 P4 DT Full sealed angular contact bearings Collet: ER16 Clip Knifediameter: 10mm,9mm,8mm,7mm,6.35mm,6mm,5mm,4mm,3.175mm,3mm,2mm,1mm Air Cooling ER16 collet chunk Grease Lubrication Main Application: Engrave for wood,bamboo,normal PCB,PVC,PMMA,plastic,duotone board(ABS)and etc nonmetal, also can engrave on gold,silver,copper, aluminium,Pb etc soft metal surface working.(Please pay more attention, this is wood working spindle, only can used for wood working and aluminum working,please don't use it for steel. If you need steel working,please check the metal spindle,thank you!)