Description:  Chuck CNC 500W Spindle Motor with 52mm Clamps and AC 110-220V Power Supply Speed Governor For CNC Machine It is a upgraded AC 110-220V one and now it can be used in AC 110-220V±10% 50/60Hz power supply.     Specification:  Dimension: 130mm×100mm×50mm (L*W*H).  Input: AC110-220V±10% 50/60Hz.  Spindle Motor: 500w.  Spindle Speed: 3000-12000r/min.  Motor Diameter: 52mm.  Motor Length: 208mm.  Operating Voltage (Output Voltage): 100V DC.  Current: 6A.  Speed: Up to idle up to 15,000 rev / min.  Torque: 5000G/CM.  Insulation Resistance: > 2 megohms.  Dielectric Strength: 400V.  High precision spindle runout 0.01-0.03.  Chuck size:  Chuck Size: 1/8".  Material: High Grade 45 Carbon Steel.  Total height: 18mm.  Outer diameter(Max.): 11.5mm.  Gripping Range: 3mm.  Small diameter: 7.8mm.  Fits metric shank size(s): 3mm metric shank.  Nut Size:  Inner Diameter: 8.7mm.  Height: 13mm.  Diameter: 17mm.  Outer Diameter: 19mm.     Package Included:  1 x 500W Spindle Motor.  1 x Power Supply.  1 x 52MM Mount Bracket.  1 X ER11 Collect.  4 x Screws.     Note:  The wire + and - could be connected in both position as you want but make sure the output and input voltage position to be correct.