I am designing a fastener.
I work for a company in orthopaedic medical devices. For clarity, I also study part time for my degree. This is for work though.
I have hand calculations for every other aspect of the screw (and associated assembly). I haven't been able to track down any calculations...
Thanks - I wasn't sure if the above equation related to an internal or external hex. That's partly why I'm looking for the original work.
That's an interesting note about allowing drive tools to 'pop' through the flats; no doubt Titanium combined with a pan head design would make this even more...
I'm not sure how much detail you want to go into for "selection of gearboxes", but "Shigley's mechanical engineering design" (10th ed, Budynas & Nisbett) has detailed chapters on gears and shafts. I found this very useful last year during a University project involving electric motors +...
thread404-262508
thread404-200026
Hi,
Both of the above threads reference G.S. Case "Stresses on Bolts: Nut Dimensions: Wrench Design" (1926), specifically with regard to the following formula, for calculating rounding of a hex feature:
TH = CH · WAF2 · WR.H · UTS · NC
where
TH is the hex...
