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  • Users: JustinMEEE
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  1. JustinMEEE

    Surface Texture - Roughness & Waviness

    I am trying to correctly measure the surface roughness of a part I am developing. I do not have a long length over which I can measure, so I am not sure if I am getting accurate measurements. What I need is a handbook (or something similar) that will explain to me how cutoff length relates to...
  2. JustinMEEE

    Calculating mass flow - given pressure differential, density, etc.

    Suppose there are two closed volumes of gas connected by a small pipe line of area A and length L. The pipe has an L/d (length/diameter) ratio greater than 1 and less than 10. The pipe line has a valve that initially closed. Suppose also that all thermodynamic properties (pressure...
  3. JustinMEEE

    Ductile Iron Surface/Roughness Finish

    Hello everyone, I am wondering how surface finishes or surface roughnesses are typically specified for ductile iron shafts. More specifically, I am dealing with bearing surfaces in a forced lubrication system. There will be aluminum rods attached to the ductile iron shaft in a crank-piston...

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