MK 8挤出机进料器齿轮，带M3平头螺杆

用于3D打印机挤出机的标准不锈钢细齿驱动齿轮，为我正在从事的开发项目建模并基于此>；https://www.banggood.com/2Pcs-MK7-MK8-Extruder-Driver-Feeder-Gear-Wheel-40Teeth-11mm-Bore-5mm-For-3D-Printer-p-1036149.html?rmmds=category你知道吗