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Aloris and clone sizes

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  • Aloris and clone sizes

    Hi All,
    Well I am saving up to buy a quick change tool holder for my Monarch 16C. The lathe has a 16" swing, so my first guess was to get a CXA size. Then I measured from the top of the compound to the spindle center and it is only 1.8750", so I am thinking a BXA would work. The BXA might make it easier to get into corners and its cheaper also. Any of you have a similar size lathe or an opinion that would help me?
    Jay
    "Just build it and be done"

  • #2
    Is this genuine or a clone? Genuine holders for CXA should handle a 1" holder (Yuasa etc), clones seem to be 3/4". That Monarch probably would like the rigidity of the 1" but you have to be able to get to centerline for it to work, rake helps. I was running into the same problems on a similar size lathe where it was really close to being not able to run the CXA and choose to go with the bigger beef, I'll shave where I have to........the bulk of my holders are 1".

    Edit: I see Genuine Aloris holders are 3/4" opening for CXA, 5/8" for BXA, 1" for CA, I have seen 1" for the CXA unmachined or unaltered, if you have adobe pdf and a high speed connection to download Aloris has a good site on all their info, Monarch 16 lists CA as the recommended post but that seems a bit big for 1.875"......

    They also list the stud sizing for your Tslot if that helps........
    Last edited by hardtail; 04-01-2009, 07:50 PM.
    Opportunity knocks once, temptation leans on the doorbell.....

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    • #3
      Hi Jay,

      I have a 17 inch LeBlond and I am using a Phase 2 BXA wedge type post and I have not had any problems. I have taken some VERY heavy cuts and all went well. I suspect that in some instances the BXA post might not really be rigid enough for some people, but I can get reliable and repeatable operations to .0005 or better if I am careful and try really hard .

      Robin
      Robin

      Happily working on my second million Gave up on the first

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      • #4
        Hardtail,
        I have not bought anything yet. I have not been able to bring up or find the page at Aloris that shows the dimensions. I'm not sure what is going on there? I think that using this lathe at it's higher cut rate, a person would want a 1" tool holder. I would probably be good with 3/4" , but as you say the height is short and without the dimensions I am kind of stuck. A friend brought by a BXA, when the top of the slot for the tool is even with the center line, the tool holder is at mid way on the post or just above mid way. I think the next size up is going to be to big? Post a link for the PDF file if you would.
        Tanks for all the replies, Jay
        "Just build it and be done"

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        • #5
          Here you go. Top of the page right click and save as works for me.
          http://www.aloris.com/index.php?page_id=1

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          • #6
            I was fortunate and able to borrow a buddy's CXA for a test fit, mine has this funky quick release system mounted on top of the cross slide for quick tool retraction during threading etc that probably amounts to between 3/8 to 1/2" height loss. I had thought I was going to have to remove it to use the QC but if I drop everything down as low as it will go with a 1" holder I'm right at centerline so with a little massaging I'll make it work.

            I just ordered the CXA for Matt at qualitymachinetools and it should be here next week. If you can wait til then I can give you more detailed measurements if you can't get them off Aloris's site.
            Opportunity knocks once, temptation leans on the doorbell.....

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            • #7
              Thanks for the link Clinton. I got it to work when I finally clicked the right button.

              Hardtail, I can wait. I will have some questions. I am going to PM you so we can do some info exchange through email if that's alright. Save space here. As far as I can tell, it will be nip and tuck to get a CXA to work. The BXA will probably be fine and if need be I can modify some holders to fit with larger shanks. This lathe has the capabilities of massive metal removal rates, which I will seldom use I imagine, but I hate to be limited also or shoot myself in the foot so to say.

              Jay
              "Just build it and be done"

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