1Can be used for carving metal or non-metallic materials 2The main spindle comes with forced air cooling, can work for a long time 3This motor's speed is 12000r/min, high speed and low noise, suitable for carving PCB, acrylic, drilling etc 4Radial run-out of spindle about 0.01-0.04 5This spindle motor with large torque 500mN.m Features:Can be used for carving metal or non-metallic materials.The main spindle comes with forced air cooling, can work for a long time.This motor's speed is 12000r/min, high speed and low noise, suitable for carving PCB, acrylic, drilling etc. Radial run-out of spindle about 0.01-0.04. This spindle motor with large torque 500mN.m. Adopted of purecoppercoil, importedhighqualitycarbonbrush.Specifications:Working voltage: 48VPower: 400 WSpeed: 12000 r/minTorque: 500mN.mInsulation resistance: >2MInsulation dielectric strength: 400VDiameter: 5.2cm/2.05inch Size: as the pictureWeight: 900gPackage included:1 x Spindle MotorNote: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.