Almost as smooth. But remember the bits are rated around 30,000 for safety purposes. Few router bits are rated for 55,000.Sheldon said:I just got an NSK air spindle for my cnc, (55,000 RPM) and putting an inch and seven eighths three wing cutter on it is really scary.I might try a straight bit, can you get a smooth cut with them?
http://www.rockler.com/ecom7/product_details.cfm?&offerings_id=5724
does the above page have a bit that you would recommend trying?