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Summary: Reverse mount the bowl and turn it by hand to see any side to side movement. Learn about reverse mounting a bowl from a woodturning expert in this free crafts series.
Woodturning is my dream. I was introduced to woodturning 25 years ago when I took an introductory class for a 5-in-1 machine my wife encouraged me to buy. For the next 20 years, I...read more
"What you want to do at this point is reverse chuck the blank. You want to take it and unscrew it off the screw center chuck and put it in an expanding four jaw chuck. The important thing at this point is, once you have it in and loosely put in, rotate the bowl by hand. You want to see if there is much side to side movement. If there is too much side to side movement which is called eccentricity you need to put it back in. If you find let's say that this edge is out a little bit you can tap it back, rotate, tap until it runs fairly true. It doesn't have to be 100% but as close as you can. When you get it in the proper location, get in, tighten it up. Your final check is to turn it on and as you turn it on you should see virtually no type of shadow movement it should run fairly true. If you are taking in and using a chuck, instead of this case where it is expanding, where it is contracting on the work what you want to do is protect the base by putting on a piece of cloth or a piece of paper towel that that is what the jaws will grab on before it grabs on to wood."
eHow Article: Reverse Mount a Bowl for Woodturning