1) The integrated shaft design ensures better concentricity of the gears, reduces eccentric rotation of the gears due to assembly, and ensures that the gears transport filament more evenly. 2) CNC hollow POM gear, reduction gear design, high transmission ratio, achieving greater extrusion torque 3) The driven gear uses double instead of the old needle bearings, with smaller clearance and higher precision. 4) Use high-strength mold steel as the material of the feeding gear, and use nano-coating for surface treatment. The overall hardness HRC value of the gear reaches 62-65; the surface hardness value reaches 1000-1200, which greatly ensures the gear Strength, wear resistance and corrosion resistance. 5) Helical gear design, better meshing performance, smoother gear transmission, and more linear transmission force. The transmission overlap is large, the meshing time is long, and the contact area is large, which reduces the stress, thereby improving the load-bearing capacity of the gear and extending the service life of the gear. Name: mini helical gear kit Scope of application: Mini Extruder, VORON 0, 0.1 and 0.2 series or other places where this set of gears can be used. If you are good at mechanical design, you can also a part of your extruder design. Processing technology:CNC design, while ensuring the strength of the gear itself, remove excess material from the gear and reduce the weight of the gear. Colour:As Shown Material:Pom+ nano-coated steel Package Contents: 1 * 3D Printer Gear Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.