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  • Users: geesaman.d
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  1. geesaman.d

    ISO 12944 paint systems applied to machinery

    I'm seeing this more and more. ISO 12944 paint systems are built around structures of welded construction where seams, exposed threads, machined surfaces, lubrication fittings, etc simply do not exist. I know I can provide paint systems that meet ISO 12944 corrosion resistance ratings within...
  2. geesaman.d

    ISO 9001 document control

    Context: I am an engineer with some years of managing controlled engineering documents as our quality team / audit findings advise. My company has changed ownership and the quality system 'rules' seem to have changed on us, such that I want to know where in the ISO 9001 heirarchy I can see the...
  3. geesaman.d

    Tolerances of taper fitted components

    Hello, My company produces rigid shaft couplings normally of a 1.25" taper on diameter per foot. Mean diameter is between 2" and 6". It is self locking. We generally judge the form to be enough to generate 75-90% contact with the mating part based on a (very thin!) bluing contact check...
  4. geesaman.d

    Engineering software tool for analyzing widely varying loads on a structure

    Hello, I have an engineering problem that involves the stress of a shaft system with multiple load points and the loads have varying direction and magnitude. The variation over time is *not* cyclic - it is random. If you ignore the variations for a moment, this is an easy linear structural...
  5. geesaman.d

    Model States vs. iParts

    New to Inventor, making choices of how to most effectively re-create our regular designs in Inventor. I see that in Inv 2022, Model States do everything that an iPart can do and more. Do Model States replace iParts? Are there situations where iParts remain the better choice for handling...
  6. geesaman.d

    Galvanic corrosion in air

    Are there any resources / standards that provide clear recommendation on which situations (which environments, how dissimilar the metals, practical mitigation methods) for galvanic corrosion in air? (It seems that salty, humid air is the major use case). Thanks, David
  7. geesaman.d

    Accelerated rolling surface fatigue (L10) testing

    Hello, I'm trying to study the vibration of a machine with antifriction bearings (mostly taper roller) that generally lives 5+ years before reaching rolling surface fatigue failure. Unfortunately I may not have a set of suitably worn bearings to harvest for this test study. Is there a...
  8. geesaman.d

    High alloy lockwire

    My company supplies components in a variety of alloys. 95% is carbon steel, 304SS, or 316SS. We have 316 SS on hand that we use for lockwiring these. When we supply higher alloys (C-276, 317L, 904, 2205, 2507, AL-6XN, etc). Getting a small quantity of lockwire is a real pain, often we're...
  9. geesaman.d

    "We must prevent this from ever happening again!" - the most wasteful words in Engineering

    Tossing this out for discussion, the corrective action / preventative action process and how it can drag a business process into the trash. It seems common for mistakes of moderate severity to coincide with situations where the implications are amplified. The cost ends up being outsized. Then...
  10. geesaman.d

    Engineering Companies and specifications

    I'm going to try and keep this neutral. Full disclosure, I work for an equipment manufacturer that sells to chemical industry, mining, and oil/gas. It's not helpful for me to question the hand that "feeds" me. But I feel compelled to learn more about it. We are struggling to provide our...
  11. geesaman.d

    Documented practices for tack-welding hardware

    I work in rotating equipment where hardware loosening is occasionally a problem. My company standard practice is to apply any means except welding to keep hardware from loosening. It seems like welding causes as many problems as it solves. We have customers with specs who require welding of...
  12. geesaman.d

    Anti-galling stainless w/ high strength

    Hello, I am trying to upgrade a component that is currently electroless nickel-plated 4340, approx 160ksi ultimate strength to a corrosion-resistant / uncoated material. It is essentially a tapered wedge collar connecting a ductile iron sleeve with female taper to a straight shaft with...

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