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Sioux 645D chuck upgrade

Mgdoug3

Well-known member
Joined
Mar 2, 2018
Messages
1,391
Location
KY
I picked up this last week and at first wasn't happy with the runout. Runout was around 0.004". After several hours I did get it to 0.001" which is probably good enough but I can't help myself. I ordered some 1144 metal and a Shars ER32 chuck. A couple of hours playing on my lathe with a 4 jaw chuck and tenths dial indicator, I had a chuck that has the accuracy I want and a wider range of sizes. I tested several used valves in different sizes and had repeatable 0.0005" accuracy.

I noticed that my wheels had seen better days and order new wheels. I knew my old wheels were worn but it shocked me to see the difference side by side.
 

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