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Recent content by valensdiesel

  1. V

    Obsolete Bijur oiler fittings, help!

    Thanks, I called but the expert person wasn't in. I'll try tomorrow.
  2. V

    Obsolete Bijur oiler fittings, help!

    Thank you for the offer, I really appreciate it! Looking at the drawing from Bijur it looks like the CKB might work if I turn down the pipe threads to 5/16-24, but I'm not sure about the quality of the o-ring seal since the nipple is 9/32" instead of 5/16", and the existing design uses a thin...
  3. V

    Obsolete Bijur oiler fittings, help!

    Hi gang, Hoping someone has a disused box in the back of the shop somewhere. I've got a Reid grinder that I'm servicing, and both of the oiler meter valves for the slide ways are of an obsolete insert type, "FKC-1", and of course, broken. They have an o-ring seal and a 5/16-24" thread for...
  4. V

    Supermax YCM-16VS oiler check valves

    Hi all, TL,DR: Does anyone know what the proper oil check valve flow range (e.g. 0, 3, etc) is for a YCM-16VS Supermax CNC machine? As the title says, I've got a YCM-16VS supermax in the shop. I decided to do some maintenance on it and went to check the oiler check valves (has an automatic...
  5. V

    Rotary table/dividing head calibration with theodolite

    For those of you playing along at home, I was able to resolve the issue with the horizontal adjusting screw, but it turned out to not be sticking in the return mechanism, but rather sticking in the bearing that the theodolite rides on. I took John's advice and used a cotton swab with some...
  6. V

    Advice on boring tapered holes

    Yes, this was basically my thought process. For straight reaming, the best order of operations seems to be drill -> bore - > ream, so I figured that would be the thing to do, since the tapered reamers are available, and I can bore a tapered hole. Kinda figured that pre-boring after drilling...
  7. V

    Advice on boring tapered holes

    Hey all, Hopefully you can give me a bit of advice on how to tackle this particular problem. I've got to place 24 tapered holes around the circumfrence of a circular object, (a wheel for a rotary punch). The taper is designed as a JT1 to accommodate some insertable punch tools which I will...
  8. V

    Rotary table/dividing head calibration with theodolite

    Very interesting. Thanks for the insight on the lubricants! I've got some aviation instrument oil and aeroshell 7 in hand so I will clean up the theodolite and give those a go and report back regarding their performance. I'm doing some more thinking about this project as it relates to the...
  9. V

    Large specialized fixture table

    I can't help you with your exact solution, but laser tables are made to be flat to those tolerances over large distances and typically have an array of holes (1/4-20 typ.) already drilled in them. You might see if Newport or Thorlabs, etc, can provide you with a solution. It may be possible to...
  10. V

    Rotary table/dividing head calibration with theodolite

    Vermont Photonics has a guide you can download of general methods for autocollimator calibrations. The last one down the line is for rotary tables that describes the setup: Autocollimator Applications That method assumes you have a perfect polygon mirror, but actually any will do, provided you...
  11. V

    Rotary table/dividing head calibration with theodolite

    You described my instrument perfectly, and in fact, the ST-200 IS the Microptic No. 2. I know that there were several successive model numbers because in my travels I have seen a different Microptic No. 2 with the model number ST-200-3. No idea what the differences are, though. Thanks for your...
  12. V

    Rotary table/dividing head calibration with theodolite

    Very interesting points. I hadn't considered the effect of refractive index but now that you mention it I can see it being a significant issue. I did and still do think that achieving single-second accuracy with this method is hopeless (unless maybe I could set it up in a linear accelerator...
  13. V

    Rotary table/dividing head calibration with theodolite

    Hi all, Found an interesting method for calibrating a rotating axis. This post is mostly for information in case someone else is searching for this idea, but I would appreciate any advice regarding an equipment maintenance question at the end. This method basically boils down to "bolt a...
  14. V

    3 jaw chuck scroll

    Since we are discussing this, how accurate do you think your typical lathe cross-feed gear reduction is vs CNC interpolation? Obviously much depends on the machines in question, but you can get air turbine grinding spindles for a CNC, so if you needed a one-off part to fix a lathe chuck, it...
  15. V

    Maryland area scraping

    Hi everyone, The punch line first, relevant details below. I'm looking for someone who can do scraping work in or around Baltimore MD. I don't mind traveling a bit, since I think I can just bring the actual parts to be refreshed without needing to lug the whole machine. Okay, now the...
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