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Parting Spindle HP / Rigidity

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  • brozier
    replied
    Does the Mini-lathe headstock have taper-roller bearings in it?
    Apparently it transforms parting.

    Also look at a substantial rear-tool post to hold the parting blade upside down - it's made a big difference on my Myford....

    Cheers
    Bryan

    Leave a comment:


  • Carld
    replied
    Snowman, if your setting up that make shift lathe to just part off the pieces why won't a chop saw do the same thing? Your not going to have an automatic process with the make shift lathe and a bar feed.

    Also, why can't you eliminate drilling the 1/4" hole by using DOM and still do the other operations? Drilling a hole is not a fast operation in a lathe and I always like to start with DOM if I can get the right sizes of OD and hole. Even a close size hole and drilling or reaming to size is faster that starting with a solid bar.

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  • lakeside53
    replied
    I'll admit to occassionally using a portaband on my lathe

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  • snowman
    replied
    Thought about it (I really did).

    I do have another project right now that I am considering installing a automatic drill press on my bandsaw.

    Leave a comment:


  • Black_Moons
    replied
    Ok install a bandsaw on your lathe.

    That'd be pertty awsome actualy...

    Do it. Install a 4x6 with CNC hydrolic downfeed mod onto your lathe! it will be awsome! you know it will.

    Hell, even a port-a-band would be big enough for lathe work.

    Leave a comment:


  • snowman
    replied
    Originally posted by Carld
    You may also be able to buy DOM tubing the size you are making.
    You can, but the drill is 1 of 8 steps to this little piece. Chopsaw just isn't an option, as I'm tryin to set this up as a barfeed operation.

    Leave a comment:


  • Carld
    replied
    I am going to assume your not parting it off with a 1/4" drill bit in the hole as that would not be nice to see.

    I think what your proposing will be strong enough but a cutoff tool is no more accurate than an abrasive chop saw and it's easier and faster to use. You can set a stop to part the tube off to the length you need.

    You may also be able to buy DOM tubing the size you are making.

    Leave a comment:


  • Boucher
    replied
    Cutoff Priorties

    Just a reminder a bandsaw, chop saw, cold saw are better cuttoff tools. Depends on accuracy and finish requirred. After buying a good Kennametal parting tool I use the lathe more often but it still runs a second to the others mentioned. A cold saw is nearing the top of my want list. Trying to make a parting machine from lightweight components sounds like an exercise in frustration.

    Leave a comment:


  • snowman
    started a topic Parting Spindle HP / Rigidity

    Parting Spindle HP / Rigidity

    I need to part through 3/4" Diameter CRS with a 1/4" drill in it. This is a custom job that will repeat itself. I am considering setting up an old mini lathe headstock with something resembling more a turret lathe than a mini lathe.

    Note that the only part of the mini lathe that will be used is the headstock, which will have a direct belt drive to a 1 Hp Baldor DC drive motor. The actual bed is a piece of 4x6" square tubing, 1/4" wall, with a 1/2 thick x 3" wide piece of steel welded to the length and milled flat. On that is a THK slide, with a dovetail cross slide (custom milled from CRS, expected to be expendable over time)

    I am concerned about the rigidity of the setup, though I'm not sure I need to be. I'd love a heftier headstock, but I'm putting this crap together with what I have, not what I'd like.
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