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Old 12-13-2018, 06:02 PM
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Lu47Dan Lu47Dan is offline
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Join Date: Mar 2006
Location: N/W Pa.
Posts: 6,003
Default 4 jaw chucks, independent vs. scroll.. 8" or 10"

Thinking out loud it helps to clear the cobwebs.
I have for a long time wanted to purchase a 4 jaw chuck for the Clausing. But with the L00 mount used chucks were not plentiful around here or on the net. CDCO has one model, plain back, no mount, but they sell the mount also. It's main drawback is no rpm rating. So the search has drug on for a very longtime.
The other day I was searching for dividing head and stumbled on a 4 jaw chuck, 6",8",or 10" independent, with a semi-finished L00 mount . It has an rpm rating of 2100rpm. More than enough for me. Fitting the chuck to the mount is not that complicated, there have been several done here and there a more than a few series on Youtube showing the process. Most all my questions have been answered on that front.
The main question is what size to get?
I have a 8" 3 jaw on the lathe as the only workholding device right now.
Buying a 10" 4 jaw independent chuck id not too much more than the 8" 4 jaw independent is, but would the 10" be too big for my Clausing 6903 14" X 30" lathe?
The title of this thread says, independent vs. scroll....
I am going to buy one of each, the scroll has its uses, one of which is to drill into the end of square stock when dead nuts accuracy is not needed. I might have a production job of that nature, this coming spring. A 5C collet chuck will not work as the pieces are beyond the size range of the collets.
And the 4 jaw independent chuck will get a lot of use once I get started on the crawler again.
I am going to replace the 3 jaw also, but I would like to find a Set Tru or similar chuck to replace it with.
Any comments, ideas, or hard experience will help.
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