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Recent content by Paolo_MD

  1. P

    Screw type ID

    I have never seen anything like that before. However, it reminds me of deck screws with hybrid Philips/square head. Have you tried a square bit? Paolo
  2. P

    Heavy Corrosion is Lifting Electromagnetic Chuck. What to do?

    Just a couple of quick comments. First, in absence of a long enough/good enough parallel/straightedge, a precision level could be used to detect how bowed is the table (or better, the table's ways). Second, a regular ohmmeter might be insufficient for detecting current leakages, since the...
  3. P

    Heavy Corrosion is Lifting Electromagnetic Chuck. What to do?

    I suspect that, if you leave there that rust as it is right now, it will start growing again. I would suggest treating it first with some rust converter (mainly phosphoric acid). Paolo
  4. P

    John L Bogert lathe FS on FB

    Perhaps it's the lathe that inspired Monarch for their 10EE. Paolo
  5. P

    Burke No. 4 Vertical Head Spindle Wobble

    Greg, Just a couple of questions, in order to clarify more what is going on. 1) Does the spindle have a "key" that engages the keyway of the collet, or could the collet be inserted at a random angular position? 2) Did you make a note of where the max runout was occurring in relation to the...
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    Special Starrett 569 tube micrometer info needed

    It looks like it is doing a similar job like the "direct reading" of the dials on the cross-slide of several lathes. My wild guess is that the intended pin is pointed and the mic was intended to be used by placing the pin in the center hole of the piece and measuring the diameter (by measuring...
  7. P

    Rear spindle running warm on Kempsmith 1G (gear head) milling machine

    I don't know if existed factory specs/instructions on how to adjust the preload of the bearings. One thing I would make sure is that there isn't too much preload. Old, dried out grease could offer enough resistance to raise the temperature significantly. And, again, with greases, there is...
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    I can't imaging what this guy spent on his shop .

    I think they said it was around 150 lb
  9. P

    I can't imaging what this guy spent on his shop .

    That was a big one too! Paolo
  10. P

    WTB: Trashed NMTB 50 2" dia. Arbor

    M.B.: I've sent you a message with the picture and diameters of three candidates. Let me know if you are interested in any of them. Paolo
  11. P

    Burke No. 4 Vertical Head Spindle Wobble

    I would suggest inspecting before going on a shopping spree. Now that the head is reassembled and we have verified that the runout at the collet taper is only .002", we can check the collets and see what happens. If we observe a significantly larger runout, let's see if it clocks with the...
  12. P

    Need an expert to help identify this Tool and it's use. Thank you in advance. Mark Spencer

    It looks like a spring-loaded center-punch that has been modified to punch two dimples at a specific distance, instead of one. Intended use? no clue. Paolo
  13. P

    Burke No. 4 Vertical Head Spindle Wobble

    Is the gear meshing smooth all the way around, or is it some place during the rotation where the meshing gets tighter? I agree that there are a few things that are baffling and sub-standard in the design of this head. Our thought of the "stop" acting also as bearing surface derives from its...
  14. P

    Burke No. 4 Vertical Head Spindle Wobble

    Thanks, Greg. My apologies, but it takes some time for me to get a clear mental picture. From your last set of measurements, I would definitely exclude that the spindle is bent. Probably, it has been reground at some point or, even originally, features were machined/ground on different setups...
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    Burke No. 4 Vertical Head Spindle Wobble

    Thanks Greg. This is a good starting point. However, the setup should be modified a little bit. Right now, the left V-block contacts the spindle almost in the middle, approximately at your measuring point #2 (therefore the 0 runout there). You should just slide everything else to the right, so...
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