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  1. ThomasUtley

    Making Round Thin-Wall Cylinders

    All, How would you suggest fabricating brass cylinders that are very close to true round? Would likely be starting with brass extruded tube, 1" OD with wall thickness of about 0.070". Finished length approximately 8". Smooth enough to contain compressed air well enough for damping purposes...
  2. ThomasUtley

    "One-Way Linear" Escapement?

    All, Need some ideas for controlling the speed at which an assembly which is being lifted by springs against gravity can travel upward. In general terms, the assembly being lifted weighs 50-75 lbf while being pulled upward by spring tension exerting approximately 111 lbf at the beginning of...
  3. ThomasUtley

    Small Air Dashpot Design Guidelines?

    All, First post after searching your excellent archives but coming up short. I would like to fabricate a small diameter (1" OD max) air dashpot/damper/(dampener?) cylinder. It is to be incorporated into a piece of furniture to control the speed at which a hidden compartment opens and avoid...

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