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  1. #1
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    Default Medium size CNC lathe?

    Someone asked me about machining some camshaft blanks. Up to 80mm diameter. There are plenty of machine shops that could handle that,


    ...but was wondering if anyone knows of an old CNC lathe being scrapped?



    I would only need something that could support a live centre about 700mm away from the chuck, so I can rip into the lobe sides.

  2. #2
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    good luck, machine tools are in short supply, and prices are wayyyy up, and anything getting scrapped will be $$$$ to fix. I have been looking for a VMC for home and everything that comes up is either too old and flogged or too expensive.

  3. #3
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    Old+Flogged is OK. This job is only rough turning, so parallelism and surface finish are secondary.


    1. I know of an old Okuma LB-15 II buried in a warehouse,
      but they are only 60mm in the spindle.
    2. Someone told me that large machines are often just cut up for scrap value,
      because they are so difficult to move.

  4. #4
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    https://www.machines4u.com.au/view/a...-Lathe/491241/

    1m between centres, 80mm spindle bore, 15HP, $15k.
    Gear cutting specialists and general engineers www.hardmanbros.com.au
    Fine pitch gear cutting from 0.1 Module www.rigear.com.au

  5. #5
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    Quote Originally Posted by nigelpearson View Post
    Old+Flogged is OK. This job is only rough turning, so parallelism and surface finish are secondary.


    1. I know of an old Okuma LB-15 II buried in a warehouse,
      but they are only 60mm in the spindle.
    2. Someone told me that large machines are often just cut up for scrap value,
      because they are so difficult to move.
    A large machine would be something that is multiple crane lifts and truck loads to shift, and it mainly manual machines that are getting the chop as they are obsolete. A lathe up 1.5M swing and 3M between centers fits on a semi and can be lifted by a franna.

    Trouble with Old CNC's is the electronics tend to fail, and its gets very expensive to repair (the exception to this would be fanuc because they are so common and tend to be very reliable).

  6. #6
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    Quote Originally Posted by snapatap View Post
    good luck, machine tools are in short supply, and prices are wayyyy up
    Took a while, but your luck eventually worked!


    Found a $1000 project lathe:
    IMG_4103.jpg

    470mm swing, 80mm hole in the spindle:
    IMG_4106.jpg

    Gearbox looks beautiful. Very little wear:
    IMG_4108.jpg IMG_4109.jpg


    Sadly, no controller, no driver electronics for what looks like DC motors, no carriage lubrication pump, missing some covers, and a cracked ball screw end casting:
    IMG_4110.jpg


    A few mysteries to work out, like what this is for:
    IMG_4107.jpg

    and why there are 6 wires in the 3Ø motor:
    IMG_4104.jpg



    Current plan is to attach a Masso touchscreen controller.

    If that is capable of driving DC motors, try to work out drive electronics for what we have.
    Otherwise, new large steppers and drivers.

    Probably no spindle speed control (VFD) for now, as a 7.5kW motor would need a big device?
    Nigel, from a cave FULL of unfinished projects and lost tools.

  7. #7
    jatt's Avatar
    jatt is offline Always within 10 paces from nearest stubby holder
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    Yep looks like a project alright.

    Inter to watch how it comes along.
    Frisky wife, happy life. ​Then I woke up. Oh well it was fun while it lasted.
    From an early age my father taught me to wear welding gloves . "Its not to protect your hands son, its to put out the fire when u set yourself alight".

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