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Recent content by DeSimulacra

  1. DeSimulacra

    Rounding of Tolerances

    Randy You said" On some of our drawings, where the metric is primary, we design to the inch and derive our tolerances from the inch and then convert to metric. I know, it's not proper and probably wrong, but when the 800 pound gorilla says to do it that way, you do it." All that is fine, just...
  2. DeSimulacra

    Tolerance hole to have interference fit to shaft, RFS

    Thanks for the tips. I agree I may be overly concerned about the details.
  3. DeSimulacra

    Rounding of Tolerances

    I agree with MintJulep, if inches are the primary. I was taught that the secondary dimension be it metric or English is there for reference only and that the primary dimension is what tolerance is derived from. How else could you determine what the tolerance is if the English and metric have...
  4. DeSimulacra

    Tolerance hole to have interference fit to shaft, RFS

    I guess what I am after is a more "professional" way of stating diameter and tolerance rather than; (0.0005/0.001" press-fit to shaft, RFS) However this may be the best way? I admit something like the above is how I have always done this before. Now however I have a big name customer asking me...
  5. DeSimulacra

    Tolerance hole to have interference fit to shaft, RFS

    Hi, I have been made mechanical drawings most of my life and I guess I am having a brain sneeze (Thanks Si). Besides just long hand stating it, how would you draft having a bore interference fit a shaft regardless of the shaft diameter. In this case the shaft varies and we do not want to...
  6. DeSimulacra

    Retractable Casters

    Thanks Berkshire and SnTMan but yes I have. I probably could make those work but hope for something more oh hate to use this word but "elegant".
  7. DeSimulacra

    Retractable Casters

    oh and yes I have tried all caster sources including listed. Mint's idea is close and may be adaptable in Steel
  8. DeSimulacra

    Retractable Casters

    Quote "Is there some reason that a retractable foot (with the caster remaining stationary) not an option? " Yes there is. I need the casters to retract. Mint you got me thinking
  9. DeSimulacra

    Retractable Casters

    I am designing a device that needs retractable casters. I found an example on-line in the Brunson 230-F but cannot work out how to design this. Has anyone got an idea? Requirements: Retract/deploy 3 or 4 casters using foot or hand lever. Casters must lift load of approx. 200# approx 1/2" off...
  10. DeSimulacra

    Eratic Mouse Behavior

    I am having the same problem and have not yet found the answer. The mouse works great if you get away from clutter and into a blank area.
  11. DeSimulacra

    uno

    Egg on face but knew it was simple, a draftsman thing! Thanks!!
  12. DeSimulacra

    uno

    What does "UNO" stand for? This is on a metric drawing and applies to a set of holes. I Can't find this out on web?? I used to know in another life. I think it is a DIN standard? Any help appreciated even direction to correct thread/forum. Mark
  13. DeSimulacra

    Circled leader text

    Been on vacation. I'm using 2009 presently waiting for the SP before I install 2010.
  14. DeSimulacra

    Attaching tension cable to concrete block wall

    Hey Hokie I know exactly what you are talking about. I'm overly cautious I guess but in my 30 years I have yet to design something that hurt someone. Building one off's I intent to keep it that way by being scared, very scared to under design something. My motto is when in doubt build it stout...
  15. DeSimulacra

    Attaching tension cable to concrete block wall

    Thanks for all the replies. I feel I can design this safely now with the info you've given me and that is by deciding I don't know enough to use the block mount. So I changed my design. The cable size had gone down to 1/4" (got into sag) and is still oversize, may go down to 3/16". I also...
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