Those are engine revs though. This is the polishing pad doing that many revs. Let’s do some math. Circumference is 2 pi times radius. That’s about 2*3*2.5 which is 15. That’s 15 feet around on the wheel. Multiply times 6000 rpm and you have 90000 feet per minute which is about 17 miles a minute, or 1021 miles an hour