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  • Users: mesa5
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  1. mesa5

    Proper Callout for Hole Centered on Internal Bore?

    There's a tight clearance fit between the bore and the mating part, and the hole is basically a viewing port for an optical component. So the mating part in the bore is well centered, but if the hole is off axis, it will interfere optically.
  2. mesa5

    Proper Callout for Hole Centered on Internal Bore?

    I have a part that has an internal bore with a small hole at the bottom of the bore. I want the hole at the bottom to be geometrically concentric with the diameter of the bore, because the mating part locates off the bore and slides into the smaller hole. If the hole is too far off of the...
  3. mesa5

    Friction Ball Joint OEM?

    You'd think that, until you start researching it. Very few have the features I'm looking for (friction fit w/o a separate locking knob, threaded terminations on both ends, OEM supplier, etc...). RAM mounts (as you've pictured) do come very close, but I wanted to see if there was anything else...
  4. mesa5

    Friction Ball Joint OEM?

    I have looked into both of those products, but the problem is I can't find anyone that makes the "raw components" not already integrated into an existing product. I need to do a short production run, so I can be stripping apart tripods just to get a ball and socket.
  5. mesa5

    Friction Ball Joint OEM?

    Does anyone know of a company that makes locking/friction fit ball joints for OEM applications? I need a ball-in-socket type joint, but instead of being free floating I would like it to either be lockable, or preferably, have enough friction to hold up a 1 lb load until moved by a human...
  6. mesa5

    Device to cut power if load lasts longer than set time

    Ended up going with a timing relay. I had assume that there would be an off the shelf product that would exist for sump pumps, pool pumps, lights, etc... Looks like I was wrong.
  7. mesa5

    Device to cut power if load lasts longer than set time

    I was hoping I wouldn't have to buy the timing relay; since the relay, plus mounting, enclosure, cord, socket, etc.... is more time and money than it needs to be. I guess if there is nothing off the shelf than that's the route I will go.
  8. mesa5

    Device to cut power if load lasts longer than set time

    I'm having some trouble finding an off the shelf product that I would think would already exist. I have a 1/2 HP, 120V pump that will be moving fluid from one tank to fill another, until a float switch in the filled tank cuts power. As a safety backup, I would like a product that will cut...
  9. mesa5

    Sizing of connection contact plates

    This would be ~50A @ 12 VDC. For the heat dissipation I'm assuming you'd calculate the resistance of your connection plate, then determine the ohmic heat generated? Is there a formula for contact pressure/contact resistance?
  10. mesa5

    Sizing of connection contact plates

    If I'm designing two surfaces to transmit power when connected to two other surfaces, what are the equations governing the sizes of those surfaces in terms of current carrying ability and proper spacing in between? I'm sure I can start by making sure that their cross sectional area if equivalent...
  11. mesa5

    Pneumatic Expanding Tubing

    I have a really off-the-wall design for which I am researching various actuation methods. One thing I am looking for is a tube which could be pressurized and have the end expand axial approx. 0.080". The basic way to picture it would be a push-to-connect air tube, connected to pressure on one...
  12. mesa5

    Ballscrew Accuracy vs. Repeatbility

    @ IRstuff I guess what I'm not understanding is why the accuracy matters if it remains constant. Can't the degree to which it is off be measured, and then have the software account for it? I.E. program a move of 5mm when in reality only 4mm is needed, since we know the ballscrew allways...
  13. mesa5

    Ballscrew Accuracy vs. Repeatbility

    I'm working on an application involving ballscrews and I want to make sure my knowledge is up to snuff. I've been reading a lot about them, and I often see statements that say accuracy vs. repeatability requirements are often mis-understood, but don't provide a good context on why, and how you...

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