Has anyone have the same problem I have had and found a solution?
I was drilling a 15/64 hole x 2 inches deep in 12L14 steel after centering drilling. All was done on a lathe. The hole was not concentric on the oppositive end. It had around .015 runout on the diamenter. I checked my tailstock and made sure it was inlined. Tried again with same results. I then tried a larger size hole that was 3/8 diamenter and it was true. The bit is walking to one side as it drilling. It is a new jobber length drill bit. What other drill bit would do better? The drill bit is high speed steel. Larry