I have come up against a problem screw pelleting some oak, in that, when I make the pellets using my pillar drill/pellet bit, the oak burns. At first I thought this was due to my pellet bit being blunt. I have had it for a number of years and recently pelleted a project using ash with no problems, or maybe the speed of the pillar drill is too fast. Slowing the speed down had no effect. As luck may have it I had a brand new unused pellet bit in my drill drawer. This did not work either on slow or fast. I cant use the pellets even with an attempt to sand. Tried on a piece of scrap which when face sanded left a fine black line around the pellet making in stand out like a chapel hat peg. Will spraying the bit with router bit spray (which I have none) work or am I resigned to purchasing turned pellets from the timber yard? Anyways, the jobs stopped till tomorrow.