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 cowski 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. ornerynorsk

    Manifold design

    Either The Lee Co. or Bird Precision could have a solution. Have used both of these company's products in years gone by in micro-hydraulic pumps and actuators, they are absolutely top notch in their field. https://www.theleeco.com/ http://birdprecision.com/ Disclaimer - I have no interest...
  2. ornerynorsk

    Question About Threads

    Here again, you may have to extrapolate your data. The chart from the German website has no useful information to a machinist. "B" indicates an internal thread, for which you need a minor diameter range, both upper and lower limit, and a pitch diameter range, both upper and lower limit. It is...
  3. ornerynorsk

    Question About Threads

    While it's debatable whether 5"-12 would be UN, UNC, or UNS, it is for the most part a legitimate callout. You may have to extrapolate the tolerance limits for the class 2. It is generally a better practice to have this data called out in black and white on the drawing when there is a...
  4. ornerynorsk

    Is This Strong Enough?

    Shoulder bolts do very well in the application that they are most used for, which is punch strippers, hence the other moniker Stripper Bolts. Pure tension, heavy cyclical shock loading, have never had much trouble with them. It is better to have enough ideas for some of them to be wrong, than...
  5. ornerynorsk

    Prototypes (3DPrinting) parts ordering ?

    Hey Chris, we have a Stratsys Dimension 1200 es that uses soluble support material. I would classify it as a basic commercial entry level machine. It is a little workhorse, and has a fair sized envelope, 10 x 10 x 12 inches. This is our second machine of the same series. The first one, new...
  6. ornerynorsk

    Prototypes (3DPrinting) parts ordering ?

    Yes, what Brian said. Almost exclusively STL's. Once in awhile they'll request a STEP or IGES if there are closely fitting or telescoping parts involved where the models require some finishing to smooth out layer and resolution inconsistencies in order to obtain a functional part. It is...
  7. ornerynorsk

    Prototypes (3DPrinting) parts ordering ?

    There are so many suppliers out there. We print most things in-house, but for higher performance materials that we cannot print we use Advanced Tek in St Paul MN. For very large parts that are simply too expensive to have done in the States, we use HLH Prototypes in Shenzhen China. Fantastic...
  8. ornerynorsk

    Pendulum test

    Back in the day our recoil tests involved how many rounds could be fired before noticeable flinching occurred and subsequent size and duration of bruising. (tongue in cheek) It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
  9. ornerynorsk

    Rule of Thumb

    Have never heard about this before, and the guys I learned from became machinists during the WWII era, so going back a few years. A penny, or any other object made of a soft metal, is probably the worst possible material to rely upon for any kind of gauging or calibration. A simple dowel pin...
  10. ornerynorsk

    Crimp Die for 45 Primer and Cartridge -- FEA non-linear Analysis not matching with Real life results

    It's usually a military thing. It's to prevent back pressure of the igniting round from blowing the primer out, potentially jamming the action of a semi-or full auto gun. I've actually had this happen on a semi-auto 50 BMG rifle that did not have the primers crimped while shooting reloads. On...
  11. ornerynorsk

    Crimp Die for 45 Primer and Cartridge -- FEA non-linear Analysis not matching with Real life results

    There are aluminum casings, sold under "Blazer" trade name by CCI, but I'm not sure if 7075-T6 is an alloy used. I remember the 30mm DoD project for what would eventually be used in the GAU-8, I think it was an alloy specifically designed by Alcoa for that project. 7075 seems a little too...
  12. ornerynorsk

    Crimp Die for 45 Primer and Cartridge -- FEA non-linear Analysis not matching with Real life results

    First of all, FEA is not a strength of mine, but let me point out that your set-up does not appear to represent what is happening in a typical primer crimp. It looks much more like tube-end swaging. The punch will be interacting with the cartridge base end-of-tool rather than side-of-tool...
  13. ornerynorsk

    What's this from?

    I think this same picture was posted a couple of years ago on Eng-Tips. I seem to remember the bike for comparison. Can't find the thread. It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
  14. ornerynorsk

    centre of gravity, load and footprint

    A diagram or sketch would be very helpful. It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
  15. ornerynorsk

    What software or methodology do you use to assess (risk, benefit) of your modification in plant?

    As others have mentioned, it's not so much the software, you can take legible hand-written notes and it's just as legitimate, but it boils down to the meat of the discussion of the professionals sitting down and discussing what could go wrong and who/what will be affected by those failures (or...
  16. ornerynorsk

    How to apply air pressure gradually to a pneumatic cylinder

    There are slow start valves. Just google it. It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
  17. ornerynorsk

    McMaster-Carr/Grainger Alternative

    Won't let you use McMaster or Grainger??? What kind of monsters do you work for??? It all depends on what you're looking for. Zoro is pretty good. It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
  18. ornerynorsk

    How does sphere diameter affect bulk density in a given volume?

    As lead is very malleable, squash said spheres into a more optimal shape that will pack and nest more efficiently, and/or pour iodine, one of the heaviest liquids, into the cylinder until all voids are filled. It is better to have enough ideas for some of them to be wrong, than to be always...
  19. ornerynorsk

    Looking for a book about mechanisms

    There's also the 4 book set "Ingenious Mechanisms". Also an interesting bookseller: https://www.youroldtimebookstore.com/ It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
  20. ornerynorsk

    Submerged Axial Flow Hydroturbine

    Racookpe1978, Lignum Vitae? It's awesome stuff. I've made components for several restoration projects of old machinery using wood bearings. It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.

Part and Inventory Search

Back
Top