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Thread: One of the heaviest parts I’ve dealt with in a cnc lathe

  1. 03-03-2025, 10:17 AM #1
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    Default One of the heaviest parts I’ve dealt with in a cnc lathe


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    A little over 450 pounds by my figuring


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  2. 03-03-2025, 10:23 AM #2
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    Default One of the heaviest parts I’ve dealt with in a cnc lathe

    11 1/4 diameter, 16 1/8 long.
    Gotta turn part of it down to 10 3/4, the rest to 9 inches. Then drill and bore a stepped hole 7 1/4 and 4 through.
    Leaving about 1/32 on sizes, goes out to heat treat then back to me to finish. .001 finish tolerance,
    H-13 tool steel.


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  3. 03-03-2025, 11:00 AM #3
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    that's a big hunk of steel for sure I don't miss working on that stuff at all (40+ years as CNC machinist) just remember to wear your hearing protection and use lifts whenever available



    keep your lines tight as you never know
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  4. 03-03-2025, 01:07 PM #4
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    That is a big chunk. I always enjoyed manual machining. Never really took to the CNC world. Did run a water jet for a while. Nasty gritty thing
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  5. 03-03-2025, 03:23 PM #5
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    I was a little concerned with this thing because it was a really rough turned piece of stock, a little egg shaped - so I chickened out and put it on a mill, found center best I could, and put a nice deep center drill hole in it before going to the lathe. Gonna get as much weight off as I can before backing off the tailstock to start drilling.


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