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  • Users: hector002
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  1. hector002

    pulley drive vibrational frequencies

    I put this up in the gear forum but it didnt get much response, maybe here is better. Does anyone have the link to a web calculator (or text reference with formulas as a second option) that calculates pulley belt drive frequencies based on each pulley dia, teeth #, and belt length? thanks.
  2. hector002

    calculating pulley belt frequencies

    Does anyone have the link to a web calculator (or text reference with formulas as a second option) that calculates pulley belt frequencies based on each pulley dia, teeth #, and belt length? thanks.
  3. hector002

    interal stresses in low carbon steel

    I have a block of low carbon steel with a 3.543 (90mm) bore located to within half a tenth. Does anyone know of or have a source/rule of thumb that would allow me to find a maximum tempurature i could heat the block up to before I have to start worrying about the relaxation/release of internal...
  4. hector002

    pressing of ABEC9 bearings

    I have been told that heating the bearing housing to make the pressing my precision bearing easier could change the structure of the metal and slightly change the allignment of my bore. Any comments on this- i would be heating the housing up to around 150-200 deg F. I could see this being an...
  5. hector002

    Lubricant Material specs

    Im trying select a low viscosity lubricant for an experiment im running. Considering spindle oil (ISO 10 or 15) at the moment. Does anyone have a good source or reference for material specs/properties for this. I need to find out if this is a newtonian fluid or not and what effects anti...
  6. hector002

    Lubrication Handbook/Recommendation

    Anyone have a reference for a good lubraction handbook. I am interested in tables/charts of the viscosities and densities of various lubricants. Specifically I am looking for a low viscosity newtonian oil. SAE 10W is too thick (cant find info on 5W). Are there any other options other than...
  7. hector002

    surface finishes for steel shaft

    what sort of processes would i need to obtain a '12' surface finish on a 4340 steel shaft- can this be obtained just through grinding?
  8. hector002

    calculating shaft critical speed by hand

    I am trying to calculate(estimate) the critical shaft speed of a rotating shaft. When i did this back in school we solved for the eiganvalues of the 4th order diff equation: d^4(y)/dx^4 - B^4*y=0 where B^4=rho*A/(E*I)*omega however this assumes A (shaft area) to be constant. The shaft i...

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