What's Best a 3 Jaw or 4 Jaw Lathe Chuck for Accuracy?

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What's best? No matter how accurate your self centering 3 jaw lathe chuck is it's no match for an independent 4 jaw chuck. In this video we take a 60 year old 3 jaw chuck with ONLY 2 thou run out but show how a 60 year old 4 jaw will give you none, well a tenth of a thou. Thanks for watching.
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Thank you, great job showing the value of using a 4 jaw chuck. When I bought my lathe, a South Bend 13" made in 1960 it came with over 50 5C collets and 2- 4 jaw chucks, a 10" and 12-1/2" 4-jaw. I looked for weeks trying to find a decent 3 jaw self centering chuck but the prices were outrageous. It didn't occur to me that I had it all right in front of me. Collets that go up to 1-1/16" diameter and two 4 jaw chucks that could handle everything else from 1-1/8" to the lathe's limit. Thanks for the videol

paulgreenlee