Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. Tuckabag

    An unintended consequence of using GPS is threatening Vermont's historic covered bridges...

    Mate, who makes this beer? I need to get hold of some! Good Old Montague St Bridge has claimed so many victims.......
  2. Tuckabag

    Roots type blower with high vibrations

    Does the sudden temp increase/vibration correspond with the recycle line running @ 100%? Could it be rotor slip? I'd imagine that a 762mm L rotor would have a fair bit of flex when slipping and generate some good pulsations. No signs of rubbing anywhere?
  3. Tuckabag

    Acessing CMD shell in Excel/VBA with keystrokes and copying resultant data

    Thanks 3DDAve, AutoIt looks very interesting. I will download it and have a play. Much appreciated!
  4. Tuckabag

    Acessing CMD shell in Excel/VBA with keystrokes and copying resultant data

    The data I need isn't dumped out to the command line, it is just shown on the screen as the program executes. I don't think you can re-direct the data when the program runs this way unless I set the shell up as an object? And eveytime I've tried to do that I fail to be able to send...
  5. Tuckabag

    Acessing CMD shell in Excel/VBA with keystrokes and copying resultant data

    Hi, I am trying to incorporate via VBA opening a CMD shell to run an old DOS program, enter some values and then capture the results to paste back into Excel. So far I can open the Shell, run the program and send keystrokes as required using the below VBA code. works = "C:\Hydoff\hydoff.exe"...
  6. Tuckabag

    Basic Electrical CAD software

    Hi All, Looks like our workplace is going to pick up a couple of jobs where we need to create some electrical circuit dwgs showing field terminations, etc. I've done this before using our Solidworks software and creating blocks for each component, but it's sloppy and time consuming. Any...
  7. Tuckabag

    Youngs Modulus Data for ASTM A276 316/316LSS round bar

    Thanks Ed / Swinny. Data didn't need to be super accurate, just looking to run some natural frequency estimations at -90°C. I did search on here for the data that Swinny linked to, but had a brain fart and used "low temp" instead of cryogenic..... lol. Cheers for your help as usual.
  8. Tuckabag

    Youngs Modulus Data for ASTM A276 316/316LSS round bar

    Hi all, Any leads on where I can find some low temp data for youngs modulus of ASTM A276 316/316LSS round bar (cold drawn > 0.5" OD)? Specifically looking for -90°C, but anything close or lower would be fine and we will just interpolate. Data that I've found so far only goes down as low as...
  9. Tuckabag

    Improving pipe threads on LDPE injection molded component

    How many threads are left exposed when screwed in on your new part versus the "off the shelf" part? The bottom thread looks quite short for an NPT thread, first two threads or so are missing, this may be by design for clearance in the mating part? Any chance you are bottoming out the tip or the...
  10. Tuckabag

    Reverse engineering of roots blower selection software

    I would think that the slip data would be IP for most manufacturers. If you can find data with the volume/rpm for the particular blower you are looking at, manufacturers will give a chart/table with actual flow capacity at various outlet pressures. You can then work out the slip at these exact...
  11. Tuckabag

    Reverse engineering of roots blower selection software

    This might be a good starting point : https://www.pdblowers.com/tech-talk/positive-displacement-blower-calculations/ However, you'll find slip figures are going to vary across manufacturer/models.
  12. Tuckabag

    Very Strange Occurrence with Roll Pin

    Can you punch/press each end of pin once installed to splay it out slightly and prevent the pin walking out?
  13. Tuckabag

    Auto-Updating Template

    Probably late to the party on this one, if it's just formulas in cells you need to change rather than VBA code can you not write new VBA code to overwrite the incorrect cells with the new formula? Open each Excel sheet, run the VBA code and your sheet will be up to date. Rinse and repeat for...
  14. Tuckabag

    Drilling stainless a bunch of times.

    Just going off my personal experience, we seem to have very few issues drilling thin sheet with carbide drills. To be fair though, you do need to be careful when punching through.
  15. Tuckabag

    Drilling stainless a bunch of times.

    1.0mm sheet shouldn't be too hard if you going about it the right way. Your biggest issue is going to be preventing whatever you use from flexing then rubbing and work hardening the S/S. If you can get a block of wood or some other sacrificial block in behind the piece you're drilling so you...
  16. Tuckabag

    Tubing pressure reducing regulator

    Yes, any forward reducing type pressure regulator that has a bubble tight seat and non-venting sensing mechanism should work fine. You'll want to choose a diaphragm sensed regulator with as small a Cv as possible for this application to ensure maximum sensitivity and tight control of the outlet...
  17. Tuckabag

    Acceptable Clearance with Backup Ring

    If you can't improve the wear in the bearings, can you increase the groove width to accomodate a PEEK/similar bush? It will provide the tight extrusion gap for the o-ring/backup and then allow you to increase the clearance on the metal/metal parts? See attached sketch...
  18. Tuckabag

    Tubing material

    In lieu of any temp requirements, I'd look at PFA tubing.
  19. Tuckabag

    What Pressure Regulator

    If future flow requirements are a concern, I'd be installing two-regulators in duty/standby configuration. Duty regulator sized accordingly for current lower flow requirements and the standby sized for additonal future flow. Adjust the standby regulator set pressure slightly below the duty set...
  20. Tuckabag

    Overpressure Protection of Valve Actuators on Instrument Air Systems

    Why would you NOT run a PSV/s on your IA lines where the supply pressure is higher than the MAWP of any equipment connected to it? IA will generally serve a number of different processes all requiring different MAWP's so regulators and associated PSVs are really the most economical way to do it...

Part and Inventory Search

Back
Top