more info on what you did, looks like you took and old cast iron weight and not sure how you attached it to your lathe
1950 F1 street rod
1949 F1 stock V8 flathead
1948 F6 350 chevy/rest stock, no dump bed
1953 chevy 3100 AD for 85 S10 frame going for a 4BT cummins motor, NV4500
1968 Baha Bug with 2.2 ecotec motor, king coil-overs,P/S
2000 National Sea Breeze 5th wheel trailer
1998.5 Dodge 2500 4x4 Cummins,
Sorry about the lack of info. Yes it is a 10lb cast iron weight that someone discarded. I ground the letters off and turned it straight in my brake lathe. The hole was too small for my 6" 3jaw so I reference marked it for the chuck jaw holes. Drill press got me 3 holes for the chuck jaw to fit snug. I put it in the 3 jaw as shown and bored center, turned face and outer edge. I put reference lines on it to help center(rough) odd parts and such. I marked it to #1 jaw and can remove it and replace it as needed without much work truing. Then I flipped it and cleaned up the back edges. I needed it because I didn't have a 4 jaw but one became available and I didn't use it. This will probably be used as a drive plate now, but it could get holes drilled and tapped for parts and clamps. I will use it when the necessity bug bites me.
I hope this clears up the questions and helps if someone needs one. This is not intended for heavy work, but a dedicated back plate could change that.
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