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  1. Mattpdrexel

    Preventative Maintenance for Bettis D-Series Rack & Pinion Pneumatic Actuator

    Thost, Thanks for the validation, I was heading in that direction. Will be removing the preventative maintenance task now, make the maintenance guys happy.
  2. Mattpdrexel

    Preventative Maintenance for Bettis D-Series Rack & Pinion Pneumatic Actuator

    Hi all, What would be the appropriate preventative maintenance plan for a D-Series Rack & Pinion Pneumatic Actuator? The actuator operates in mild service conditions and has acted reliably for the past ten years. I do not have much industrial experience, so I have no basis for selecting a...
  3. Mattpdrexel

    Rust Particle Density as a Function of Diameter

    Hi all, I would like to determine an approximate relationship between a rust particle's diameter and it's density. Wikipedia reports the density of Fe2O3 as 5.242 g/cm3 (solid). I would consider this the upper limit on rust density, which should decrease with increasing diameter. However, I...

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