Yah, it seems like you should get more from your profiling bits. I did 100 medallions with one profiling bit, but went through 4 or five engraving bits. I order those in bulk now because they are so fragile. Also, I do not cut any metal (profiles) with less than a .125 bit, so that might be the difference. But I have forced air blowing on the bit constantly (when the router is on).