sfu2010 end machined 20mm ball screw for bk15 bf15 300mm+ ball nut for 3d printer accessories

features: 1.adopting motor steel material, with high torque, low self-inductance reactance, responsive and can avoid system error. 2.there is rotor rubber covering the rotor, effectively reduce the noise. 3.this small motors can be used in various area, such as stage lighting; laser engraving; textile machinery; equipment; placement machine; non-standard equipment; 3d printer; automation equipment, and etc. descriptions: 1.and durable in use.