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  • Users: kelroy
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  1. kelroy

    Sampling Plans and AQL

    Does anyone know of a good, practical reference for sampling plans and AQL based inspection plans? I'm thinking an AQL for dummies, or the Mechanical Engineering's "Shigley" analog for inspection? Thanks
  2. kelroy

    Reporting GD&T data on First Article Reports

    Does anyone know of a specification, standard, or industry best practice reference that addresses basic dimensions in first article inspections? I've checked AS9102 and haven't found any guidence. The question is whether the basic dimension must be referenced in the FAI (First Article...
  3. kelroy

    basic dimensions and first article inspection

    Does anyone know of a standard, specification, or industry best practice reference that addresses basic dimensions in first article inspections? I've checked AS9102 and haven't found any guidence. The question is whether the basic dimension must be referenced in the FAIR (First Article...
  4. kelroy

    First Article Inspection and Basic Dimensions

    Does anyone know of a standard, specification, or industry best practice reference that addresses basic dimensions in first article inspections? I've checked AS9102 and haven't found any guidence. The question is whether the basic dimension must be referenced in the FAIR (First Article...
  5. kelroy

    Commidity pricing on Si and Ge

    Does anyone have a good website to get current, historical, and trending for prices of Germanium and Silicon?
  6. kelroy

    Bright Annealing Spec -- is there one out there?

    Does anyone know of a good specification (ASTM, AMS, MIL, etc.) for bright annealing? It is specifically for Iron Nickel alloys, but a generic spec and/or other metal would be acceptable. Thanks!
  7. kelroy

    Outgassing of Silver Oxide, Copper Oxide, or Cusil in Vacuum

    Does anyone have any data, or even general references on the outgassing of said oxides? There's plenty out there for the stability of iron oxide on iron and CRES, but nothing on the oxides I mention.
  8. kelroy

    moly 361 sintered metal - min. cross section/machining

    I am making a part out of Moly 361. Does anyone know a rough estimate at the minimum cross-section you can machine with this stuff (bought bulk, going to machine it down). Are there any issues with cracking at thin Xsections (obviously at some point there is)? At what thickness? No choice...
  9. kelroy

    Need to make a simple mechanical system quiet

    I am trying to make a very simple system quiet - in essence, a simple thin-cross section beam banging the thin edge into piece of soft rubber. Can't change the rubber. Looking at natural frequencies, etc. of the beam. Looking at the peaks in the acoustic measurements. Any resources online...
  10. kelroy

    Au-Au worebond long term reliability

    does anyone have references for the long term reliability of Au-Au wirebonds? They are clearly accepted in industry as the most reliable system, and don't suffer any of the intermetallic issues of the Au-Al system, but I haven't found much literature out there. I'm not concerned with the...
  11. kelroy

    Diffusion of Au in Manganese

    Does anyone have a reference for diffusion of Manganese in Gold (diffusion constant and activation energy is what I'm looking for specifically, but i'll take whatever is out there)? I'm looking for the same for Au in Nickel. Thanks.
  12. kelroy

    void criteria for solder metallization?

    I am looking high and low through IPC, ANSI, and every spec organization I can use to find a good reference for metallization quality standards. My eyes are going buggy. Specifically, I am interested in specifying the plating void criteria (prior to solder) for metallized areas that will have...
  13. kelroy

    info on thermal contact resistance, gold-aluminum

    I'm looking on some data for thermal contact resistance of gold to aluminum. Specifics, although not particularly relevant, since I'm not doing lab-grade research here -- just more of an estimation: thick film "soft" gold ~32 uin RMS on a ceramic substrate machined 6061-T6 aluminum, no...
  14. kelroy

    Titanium, Aluminum Screws

    Anyone familiar with using Titanium screws or Aluminum screws in a military environment. Corrosion is not a big concern (should be in a sealed environement). They are not being used for major structural means -- just to fasten some electronics boards together w/ standoffs into an aluminum...
  15. kelroy

    ISO/DIN like Specs online?

    I am looking for a good design reference for metric stuff (socket head cap screws, button head screws) without paying $150 / screw spec. I don't need the detailed specs yet, just a reference to even see what will fit in my 3D models. Once I settle on a design, I don't mind paying the money for...
  16. kelroy

    Soft foam damping between Elec. Boards under shock

    I am looking for a good (cheap/dirty) way to dampen electronics boards in a very space limited enclosure under high shock. I was hoping to find a COTS foam tape (~.15 and ~.25 thk) that I could stick between the boards in certain places to prevent high frequency vibration. Anyone know of a...
  17. kelroy

    Soft Damping Foam between Elec. boards

    I am looking for a good (cheap/dirty) way to dampen electronics boards in a very space limited enclosure under high shock. I was hoping to find a COTS foam tape (~.15 and ~.25 thk) that I could stick between the boards to prevent high frequency vibration. Anyone know of a foam/material I can...
  18. kelroy

    spring clip / low profile fastening method for electronics boards

    I'm looking for a low profile way to fasten a nominally square electronics board to a mating hunk of metal. The smaller the better. It also has to be a positive pressure feature, since the system will be in a high shock and vib environment. I'd like to keep it to COTS stuff if possible...

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