*About turbo charger

Ball bearing-type turbo generally spread. However, we handle it in the master of floating metal-type turbocharger.
It is really the bearing method with a little resistance in the situation that it used.
The axis that is covered by oil when in a condition that engine oil warmed becomes in condition to have floated in the center of the metal, but metal cannot touch it at all.
Performance when we use it is really important for the turbocharger, and the performance comparison when an engine stops does not have many meanings.
It becomes the temperature which a turbo-charger is actually used for.
Then which a little resistance of the fluid shaft carrier that a metal doesn't touch the shaft carrier form which metals touch at all is there? The circulation of cooling water is unnecessary a fluid shaft carrier like a ball bearing again.
It can have that frictional heat around the metal doesn't occur in meaning as well to say so understood.
It goes for flouting metal-type of the fluid shaft carrier and reaches when performance in the temperature stage which a turbo-charger is actually used for and advantage convenience are pursued.