Using a side milling NC lathe parts

Using a side milling NC lathe parts
Processing features: side milling, axial groove. Both parts are convex side milling a longitudinal axial plane four cylinder, the curved groove side milling axial plane.
CNC lathes with power cutter heads, tiny milling inserts mill large flats or grooves of various sizes.
Both of the products on the left are made of brass.
The nickel-plated part is the connector of the data network cable. The connection plug of a computer or video equipment is common. The outer diameter is 16mm and the length is 25mm.
Another copper piece is the copper spool of the flow control valve, with a maximum diameter of 11mm and a total length of 30mm.