jimr
Member
I really appreciate everyones thoughts and help. I do use a barrel trimmer and mount it in the drill press. I was beginning to think that if the barrel was not parallel to the blank sides then you bring the cutter head down on the blank, and that calls for some force depending on the wood, the blank would only be seated on the drill press base by one edge. If the pressure applied by the drill press is enough then the entire blank could be skewed out of square with the trimmer shaft. Now that I think about it and read all the comments I don't believe that would happen. Someone mentioned not tightening the knurl knob to tight. I do tighten it as tight as I can but I am doubtful that would spring the mandrel. Everything is to close to a center. Another point was the mandrel not running true. That is very likely my problem. I have an old lathe and would not be surprised if the morse taper is worn. I take great pains in trying to get the live center exactly centered on the mandrel and not tighten it to tight. I am getting more certain the culprit is the morse taper. I do know that there is some tiny vibration of the bushings when roughing a blank at low speed. My solution is probably to break down and spring for a new lathe.
I sure appreciate all the responses and comments. Discussing a problem is what is needed in many cases to make the whole thing a lot clearer.
Thanks to all
I sure appreciate all the responses and comments. Discussing a problem is what is needed in many cases to make the whole thing a lot clearer.
Thanks to all