A cylinder with spiral groove on its outer surface or a cone with conical spiral groove. The screw has different heads, such as the head in the picture is called external hexagon screw. There are others, such as large flat screw, hexagon screw and so on. It can be seen from the extrusion process that the screw works under high temperature, certain corrosion, strong wear and large torque. Therefore, the screw must be resistant to high temperature, not deformed under high temperature, wear resistance, long life and corrosion resistance. The material is corrosive, high strength, can withstand high torque and high speed, and has good cutting performance.

HCVAC coating machine is used for screw parts. The more DLC coating can meet the requirements, the lower the total cost of ownership. Our ability and application expertise enable us to precisely tailor the performance of DLC coatings to meet the specific needs of our customers. High hardness, low coefficient of friction and excellent wear resistance help to significantly reduce particle formation, resulting in high yield manufacturing - a key factor, especially for smaller feature sizes. Ensure reproducible quality of coated parts and provide consistent process reliability.