The protruding cylindrical part of the hub pose the main problem in the production of this part.
The total tolerance for the inner and outer diameter of the cylindrical part is 0.03 mm, while the wall thickness itself is only 0.1 mm with a tolerance of 0.02 mm – like thick foil.
A boring cutter specially manufactured by our own pre-production department allowed us to meet the requirements for the production of the inner part of a thin-walled element (4th class of roughness).
In order to meet the requirements for the outer diameter and wall thickness, we used special tooling to prevent material breakout when processing it with a cutter.
An additional challenge was to control the roughness of the inner surface. In order for the profilometer to access this surface, two parts had to be destroyed (cut in half): one for our own quality control and the other for customer control abroad. Moreover, the part had to be cut also on a milling machine in specially manufactured tooling.
As a result, the technology is fully developed, the technological process is ready. We chose a Swiss Type CNC Lathe as the equipment for this technology.