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Recent content by MechEng1235

  1. MechEng1235

    Maximum force on a linear damper?

    I am looking at this damper on mcmaster (http://www.mcmaster.com/#6521k73/=rtyy6p) which has a maximum force of 100lbs. Does anyone know what this indicates? Does it require 100lbs. to move the rod? I am not sure how to quantify how much resistance the damper will provide. It has all the...
  2. MechEng1235

    Linear Damper

    Looking for something off the shelf and easy. I just found these guys (http://store.easylift.com/) who seem to have dampers that are compressed in a relaxed state. I need about 7 inches of travel and it should be able to handle a 200 lb force.
  3. MechEng1235

    Linear Damper

    I need a damper like the one here (http://www.mcmaster.com/#door-dampers/=rnsu4k) The problem is, I would like to find one that starts compressed and dampens when in tension. Does anyone know of an off the shelf product like this?
  4. MechEng1235

    Does anyone know if a U-Joint could be used for vertical loading?

    Tmoose, you are correct. The force is putting the u-joint in tension and will be oriented vertically but there should not be any side force since the u-joint and rotor will be concentric.
  5. MechEng1235

    Does anyone know if a U-Joint could be used for vertical loading?

    Mike, I am definitely on board with the rigid fixture idea but now I'm not certain how I could align the rotor to the stator and have it be repeatable. With only .020" to work with, it would be hard to use a guide (thin wall tube?) and I'm worried about the tolerance stack from the housing...
  6. MechEng1235

    Does anyone know if a U-Joint could be used for vertical loading?

    tbuelina "Can you provide more details of your proposed assembly fixture? You mention that some "play" is needed in the mechanism for positioning the rotor. What type of "play" is needed? A single u-joint will only provide angular displacement about the apex of the u-joint axes. It will only be...
  7. MechEng1235

    Does anyone know if a U-Joint could be used for vertical loading?

    Tmoose, the ujoint and rotor will both be hanging vertically 9 inches away from the vertically mounted actuator.
  8. MechEng1235

    Does anyone know if a U-Joint could be used for vertical loading?

    I need to drive a motor rotor down into a stator using a linear actuator but I have yet to get a good design for holding the rotor. I was thinking of having a lever arm extend out from the actuator and connecting a u-joint by tapping both ends of the joint. I need the rotor to have some play to...
  9. MechEng1235

    Need a small self standing ruler. Anybody know a product?

    I'm looking for a small self standing ruler like the one in this link. http://atvconnection.com/articles/noleen-ride-height-tool-because-setting-sag-shouldnt-make-you-sad/ It will be used as a target to view though a surveyors level to measure the height of a moving arm. I need something with...

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