1997 - Volume #21, Issue #5, Page #34
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Large Holes Bored On A Lathe
Alan MacLean, Kingston, Ontario: "Large holes can be bored on a lathe without having to use a time-consuming face plate mounting. A 1 1/2-in. long piece of pipe, faced square, and with an inside diameter slightly larger than the outside diameter of the desired hole, is accurately positioned on the plate. Attach to the plate with 3 1/2-in. long welds positioned 120 degrees apart. Put the pipe in a 3-jaw universal chuck and bore the hole. Use a disc grinder to carefully re-move the tach welds."
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