-Special milling machine
Our company uses special milling machines, such as KOEPFER in Germany and LAMBERT in Switzerland. This kind of equipment is a professional worm machining machine tool, and its accuracy can be guaranteed at DIN6 level. Domestic products can consider Ningjiang professional milling machine (buy Lambert's patented technology).
-Roll forming
Mainly depends on whether the worm parameters are suitable for this method. Personal feeling accuracy will be slightly worse than the special milling machine.
-Cyclone grinding
There are professional ones in Europe and modified ones in China. In Europe, cyclone milling is generally used to produce medical bone nails, not worms. Personally, I think the accuracy of worm is higher than that of bone nail. Worms are mainly used for transmission and bone nails are used for fixation.
-Lathe
It has not been actually used, but its accuracy is in doubt.