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Thread: Inverse live center for metal lathe work

  1. #1
    Supporting Member Guy Marsden's Avatar
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    Mar 2022
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    Guy Marsden's Tools

    Inverse live center for metal lathe work

    My video shows an inverted cone (funnel shaped) live center adapter I made for my mini lathe. This allows me to center a rod that doesn't have a hole in the end. I also show a way to convert a live center to an inverted one - but haven't made that yet.

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  2. The Following 6 Users Say Thank You to Guy Marsden For This Useful Post:

    Dimsa (May 16, 2022), Home-PC (May 17, 2022), Jon (May 19, 2022), nova_robotics (May 26, 2022), schuylergrace (May 16, 2022), sossol (May 16, 2022)

  3. #2
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    Aug 2013
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    Thanks Guy Marsden! We've added your Inverse Live Center to our Machining category,
    as well as to your builder page: Guy Marsden's Homemade Tools. Your receipt:

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  4. #3
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    Jul 2020
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    I always called them "cup centers". When turning commutators on generators and starters they rarely have centers drilled into the armature shafts so I have simple cup centers to replace the live centers. At our older manufacturing plant where I worked many years ago we had quite a few motor/generator welders from WWII that were wonderful welders - 200 to 400 amp P&H and Wilson, which I thought were the superior machines. They were HEAVY when used as portable units.
    I still remember turning many armatures with six inches or more commutator diameters, then using a mica undercutting saw (which I still have). Those larger diameter motor/generator armatures had, of course, centers in the shafts. They would have been much too heavy for the cup centers.

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