This tool cuts well into oak with good control.  I craft stools and stands from fallen trees using a chainsaw, handheld planer, belt sander, and this rotary cutter.  After many hours of use with sharpening several times, the cutter looks to be in excellent condition.  For safety I use this cutter in a grinder with a paddle switch and wear kevlar chaps.  The consequences of a mishap could be severe.