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Recent content by dtimberlake

  1. D

    Weld assessment for lifting beam

    " it's been thrown together without a lot of thought " Better understanding of some fairly basic machine design and welding concepts might help too.
  2. D

    Potteers Wheel Motor

    Wat do similar devices use? Do I surmise correctly that you are making your own potter's wheel?
  3. D

    California high speed rail

    "Not investing for tomorrow is way worse then saving money just for today." Spending is not automatically "investing". I don't consider someone else throwing a bag of my money into a garbage chute "investing". Throwing another bag down the same chute every couple of years even less so. Some...
  4. D

    Bearing roughness specification

    old ABMA ball brg info
  5. D

    Bolts and Nuts for High-Temperature Applications – Ambiguities in European Standards

    " old farts ... crap that they remember doing once." Hey, I'm sitting right here ! What is Eng-Tips HR e-mail address? https://www.mass.gov/info-details/report-abuse-of-adults-aged-60
  6. D

    Bearing roughness specification

    I'd use the bearing mean diameter and shaft speed and select a lubricant that will have a kappa (κ) > 2.0 at operating temperature. Then EHD lubrication with an oil film over 1 µ thick can be anticipated...
  7. D

    PWHT after hard facing

    I bet the overlay OEM will have something to say. I think some weld overlay materials are meant to be used in the as-welded condition.
  8. D

    Racing oil for historic engine

    What does your sponsor Castrol recommend?
  9. D

    Abaqus modelling

    If there is no steel reinforcement I might think about Principal stresses. Tensile strength is mighty low.
  10. D

    Risk of through hole on live piping

    pressure? industrial or residential? live steam or lemonade ?
  11. D

    Sqaur diffuser plenum sizing

    My recollection tis the ASHRAE handbooks have practical information about plenum sizing and much much more.
  12. D

    Torque Impact of Gear Train?

    With all them gears I'd expect lubrication churning etc might start to matter.
  13. D

    What is meaning of TS B7

    I've had a few experiences similar to MintJulep in Post 5. Most recently when looking for a chart of tap drills for varying % thread when tapping an 8-32 hole in a nasty material. AI was all hung up on thread engagement and could not be convinced otherwise. Attached is one man's opinion of AI
  14. D

    calculation for tightening torque

    If you are providing more than two diameters of thread engagement the aluminum thread "strength" may not be a problem. This is related to post 3 CWG1's second paragraph.
  15. D

    nut welding fixture

    Like this ??
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