The outline or contour of turbo billet compressor wheel is very very critical, because it matches contour of compressor housing.
Each blade’s contour of the compressor wheel is measured by image tester
Shown is a compressor wheel used for new-energy vehicles.

Machining the outline or contour of turbo billet compressor wheel
Boreless Turbo Billet Compressor Wheel
Schenck balancing turbo billet compressor wheel
