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Recent content by vono

  1. vono

    431 stainless steel magnetic properties

    I have a part that I need to make and the design calls for 431 stainless steel because of its magnetic properties. This part will hold another mart that is magnetic. I am having a hard time finding 431 stainless. Would 409 stainless steel work for this? Are all ferritic stainless steels ( 409...
  2. vono

    90mm x 90mm aluminum extrusion identifer

    Thank you DBronson that is exactly what this is... Cheers J
  3. vono

    90mm x 90mm aluminum extrusion identifer

    I was able to get some of this 8020 style extrusion framing for free. But I can't seem to identify the manufacture. It is 90mm x 90mm. It is not 8020. Does anyone know who makes this?
  4. vono

    helium flight tube for x-rays to pass through

    Yes a balanced bellows system would be the best idea. I could make the bellows out of any material as long as it can hold a slight positive pressure of helium for a while ...and is flexible enough. thanks for the input! I have J
  5. vono

    helium flight tube for x-rays to pass through

    We are trying to design a low cost expandable flight tube that can cut down the air scatter of x-rays. This flight tube need to expand like a bellows from 100mm collapsed to about 800mm fully extended. It needs to have a inside dimension of 300mm x 300mm square ( it could also be round). I was...
  6. vono

    thermal imaging thru a glass viewport flange

    Would a thermal imaging camera work looking thru a Fused Silica (UV) Viewport flange? like this one https://www.accuglassproducts.com/fused-silica-uv-viewport-133-cf-flange?category_id=2781 thanks, J
  7. vono

    I have a question about vacuum pres

    No school question..... it is only part of an issue I have pertaining to the direction of said window... I have a beryllium window that has a vac side and a atm side and if the vacuum pump fails on the vessel side I need to know if the window will hold and also I need to know the force during...
  8. vono

    I have a question about vacuum pres

    I have a question about vacuum pressure differential ...so I have a pipe connected to a chamber with a thin beryllium window separating them and on the pipe side the vacuum is 1x10 - 4 torr and on the chamber the vacuum is 1x10 -7 torr . So I would calculate there is a difference of 1x10 -3...
  9. vono

    vibrations translated from floor thru a Kinematic mount

    The new location that I need to move the device into is not negotiable. There will be vibration testing done next week so I will have a baseline to reference from. If I just increase the ball and groove size will this help? I do notice some wear on the vee grooves so now is the time for me to...
  10. vono

    vibrations translated from floor thru a Kinematic mount

    Thank you for the thoughts and information. Yes I know this frame is not on a true Kinematic mount but it is what I have to live with at this time. I suspect there are several reasons for the lack of repeatability ( under size ball point, wobbling in the post that supports the balls, frame...
  11. vono

    vibrations translated from floor thru a Kinematic mount

    I have a very very sensitive x-ray microscope that weighs 4600 lbs. this device is designed to be move in and out of position. It is currently sitting on a 4 point kinematic mount with 4- 1" dia stainless steel balls on every corner. ( 3 corners drop into corresponding vee block and one corner...
  12. vono

    very small holes in Tungsten

    Great ideas all- thanks ...I have never use that the slurry flow-honing procedure" might be an option. I have to look into that , thanks btrueblood. As for stacking in a fixture, I am working on two possibilities: 1) have several thinner wafers made and stack in a fixture 2) I am going to try...
  13. vono

    very small holes in Tungsten

    Yes - National Jet responded " Unfortunately, we are not able to make the holes that you have requested. I am sorry that we cannot help this" I was able to have Midwest Tungsten EDM ~50micron holes with some success and that is about the limit. As I said in an earlier post the LASER cut hole...
  14. vono

    very small holes in Tungsten

    I think that tungsten is too thick (0.300mm)for that!
  15. vono

    very small holes in Tungsten

    thread281-278396 It has been almost 5 years and I am still trying to get these small holes drilled in Tungsten ( see thread) Basically ~5 - 10 micron hole in .300mm thick tungsten. Needs to be a straight thru-hole no taper and smooth edges. ( laser leaves a rough edge and a taper) I am using...
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