- Feb 09, 2018 -
Metallic bevel bevel gear was originally all in Europe by hand, but with the 8-leaf profile changes, the difficulty of mapping also increased, the earliest mechanical processing bevel gear is a watch bevel gear, it is 18 At the beginning of the century, the physical objects still retain the museum in Stockholm, Sweden. The processing method is that the cross section of the shape of the cogging is formed by cutting up and down the rasp files one by one. The maker is Swedish Bo El Ham. After that, the French Shakatuba Sang Song valve rotary tooling cog-shaped shape, it is a tool harder than filing ha, similar to the rotary file.