How can remove burr?

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For burr of engine block or sleeve it is enough 30000rpm pen drill.
It’s 150 dollars.
It includes foot pedal.


This is a diamond bit.
Almost burrs are removed by little bit.


But for pin boss or bearing housing scratches, it is operated by ultrasonic dril.

But it’s very expensive.
It’s 2300 dollars.


It’s Gucci bag for my wife birthday present.
It cost as same as ultrasonic drills.



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