17hs3401s-pg мотор nema 17 планетарная редукторная коробка передач все соотношение5.18-1 19-1 27-1 51-1 шаговый двигатель для 3d-принтера

features: 1.adopting high quality 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.high quality and durable in use.