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Type: Posts; User: Dobermann

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  1. I agree that your headstock bearings look just...

    I agree that your headstock bearings look just fine. A little light touch with abrasive cloth or stone should be all you need. A brake hone will make a horrible mess out of the bearing bores since...
  2. Slotted faceplate is not "weird"--It's for...

    Slotted faceplate is not "weird"--It's for driving lathe dogs which were popular in days gone by for holding round stock for turning. Don't throw it away!
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    While alarming when you first look at them, the...

    While alarming when you first look at them, the spindle journals and bearing bores are not as bad as some I've seen. As mentioned above, just make sure there are not any little burrs or metal tags...
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    Rather than messing with wires and worrying about...

    Rather than messing with wires and worrying about pitch dia vs outer dia, why not put the gear in the chuck with the jaws reversed and then indicate off the bore to center it. That's of course...
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    I've been up and down the cutting oil choice...

    I've been up and down the cutting oil choice debate for several years and have tried a whole lot of different fluids both on my lathes and on my vertical mill. My conclusion is that Tap Magic...
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    I just finished disassembling and cleaning my...

    I just finished disassembling and cleaning my 3-jaw chuck. I was astonished (and a little dismayed) at the quantity of the chips and dust that I found inside. A lot of the debris was "helped" being...
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    Unless somebody happens to know the configuration...

    Unless somebody happens to know the configuration of the holder you need (I don't), probably the easiest solution is to rummage through the MSC or McMaster catalog and look at the holders available...
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    Go here to look at current NEMA motor frame...

    Go here to look at current NEMA motor frame dimensions. https://www.baldor.com/Shared/pdf/NEMA_chart_04.pdf

    You'll note there is no "66" frame size listed. You can try to figure out what frame...
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    2,079

    Since you have a lathe now, you should be able to...

    Since you have a lathe now, you should be able to make your own collet drawbar. Good project for threading practice.

    My dad made the drawbar for my lathe for me and all he had to work with was...
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    Couple of things: First, from the photos your...

    Couple of things:
    First, from the photos your lathe has the "small" dials on the cross-feed and compound feed. That means that the dial indicated how far the tool post moves, and NOT the diameter...
  11. I've run those belts on a 9" lathe with no...

    I've run those belts on a 9" lathe with no trouble. 2" dia motor pulley sounds a bit small but I seriously doubt you'd have any issues with power transmission with the segmented belt given how poor...
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    If it's a 3 phase motor and your other post...

    If it's a 3 phase motor and your other post suggests it is, then if it doesn't start that means one of the phases is not being connected. I'd be looking at the points in the contactors or the line...
  13. I was only polishing off some high spots on the...

    I was only polishing off some high spots on the spindle. It was scored and grooved so I just took off some of that with an India stone. The journals were not tapered and I doubt I could have...
  14. The idea of rotating the spindle in the lower...

    The idea of rotating the spindle in the lower half bearing shells might work if you had only a "thou" or two to take off but .012" is a lot of material to remove with a stone and the chances of...
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    I wouldn't be turning anything. You need to...

    I wouldn't be turning anything. You need to either purchase a test bar with a #3 morse taper on one end so that you can insert that into the spindle. (Assuming it's a #3 Morse taper like a lot of...
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    A couple of comments: If you are cutting at...

    A couple of comments:

    If you are cutting at the end of an un-supported 8" long bar is bound to chatter no matter what you do. The bar needs to be supported with a center in the tailstock. The...
  17. Wow!! That has got to be the bargain of the...

    Wow!! That has got to be the bargain of the century! Makes me wish I had a 13" instead of a 10L and 9" versions.
  18. Thread: VFD Help

    by Dobermann
    Replies
    27
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    2,276

    I was trying to be conservative

    I was trying to be conservative
  19. Thread: VFD Help

    by Dobermann
    Replies
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    2,276

    Based on my own personal experience, you should...

    Based on my own personal experience, you should be able to run a 3 phase motor on a VFD as slowly as you'd like. Running it very, very slow can get to be frustrating because the torque drops off...
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    1/2 HP is plenty for that lathe. I've been...

    1/2 HP is plenty for that lathe. I've been running mine with 1/3 HP and VFD for several years now and don't see any indication that it's underpowered. Unless you have the V-Belt drive option, it's...
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    If you continue to have the same situation with...

    If you continue to have the same situation with spindle "drag," try this: Suck out the existing oil from the oil reservoirs. Re-fill with a synthetic 0W-20 automotive oil. Yes, there will be cries...
  22. Thread: 1/2x10 acme

    by Dobermann
    Replies
    3
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    817

    I did that change on my 9 Jr. lathe. You will...

    I did that change on my 9 Jr. lathe. You will probably find that you can purchase Acme threaded rod in "standard" or "hi-precision" specifications. Sort of up to you which you want to pay for.
  23. Nothing bigger than 9" diameter. Both of my 9's...

    Nothing bigger than 9" diameter. Both of my 9's use 6" diameter chucks. Bigger than that is a losing battle because of clearance between the bed and jaws for large diameter stuff.
  24. In addition to the above, look carefully at the...

    In addition to the above, look carefully at the tapers in the tailstock ram and in the spindle. If those are scored you'll have a problem getting any taper tooling to seat and run accurately and...
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    Just somethhing to think about: While taking off...

    Just somethhing to think about: While taking off the chuck and cutting away the mount plate would certainly work as the "final solution," you might consider taking off the chuck (you were gonna take...
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