I have no idea where to get a device such as that. I know one problem is that these species are really tight grained wood. Popular usually has the green tint to it unless it is the shaken ash varitey. Go with the green that usaully tells you which way the grain is flowing. Black walnut I use quite often it is hard to tell unless it has the white veins through it. I had a piece like a burl look and had no problem with it. The only other thing I can think of is that is that you are taking to much material or your bit isn't sharp enough so that it is ripping and tearing.