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  • Users: cfordyce05
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  1. cfordyce05

    Fairfield Software Question

    I'm working on a spur gear design and would like to get a rough check of the gear strength so I downloaded the Fairfield software and entered my data. I have a question on the material strength entries. I would like to use 17-4PH in an H900 condition so under Rating Stress for bending I have...
  2. cfordyce05

    M5 Cross Drilled Head SHCS-Do they Exist?

    I have searched the net and came up empty. I am looking for a M5 stainless SHCS, or hex head, with a cross drilled head for safety wire that is covered under a standard. I don't care which standard, ISO, DIN, etc. I found that the ANSI B18.3.1M standard has provision for a drilled head metric...
  3. cfordyce05

    Interference Fits on Tapered Shafts

    Would someone please point me towards some equations for calculating the required interference for transmitting torque through a 8620 case hardened tapered (11.5deg) steel shaft to a 6061-T6 aluminum hub? Can I just use the equations for cylindrical interference fits and pick either the large...
  4. cfordyce05

    Bonus Tolerance Question, MMC on a Datum

    I have looked through ASME Y14.5-2009 and maybe I am blind, but I can't find what I'm looking for. Attached is an example drawing. How is the true position of the .056 hole affected by the MMC on datum B? The hole has a .001 tolerance zone at MMC, so I can get a little bonus tolerance if I...
  5. cfordyce05

    Belt Pull Force Calculation

    I'm trying to confirm what values I would use to calculate belt pull for a generator driven by a timing belt with a 2-stroke engine. The engine has a propeller on one end and the pulley for the generator on the other. All of the resources I have found for calculating belt pull use the full...

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