I just got a dowel chuck from Craft Supply and it came with the #2 Morse taper arbor. I stuck them together, banged it on the bench top and started turning a bottle stopper. When it came time to back off the tailstock, the chuck decided to come off the arbor. Is there some way to lock it on? I cleaned it with lacquer thinner and banged it together again, but it continues to come loose. Is there something I should know?