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There is one very important thing to remember. Factor of safety in vacuum chambers can be much lower because if they fail they don't create shrapnel. I would expect that the pressure vessel calculatoins would already have a significant factor of safety built in. very likely more than you need. a...

All I can suggest is the parker O-ring handbook, or Eriks technical manual. Unfortunately these both focus on O-rings more than other types of seals.

Do you gear the output to a 6:5 ratio to achive the desired input speed of the machine you are using? by gearing the speed down you would reduce the motors power load and the required heat dissapation.

Could you just use basic dimensions to create the pattern of true positions and specify the tolerance to true position? BTW im not scared to talk to pretty girls or of GDnT, Just the rest of Kenat's list.

coreypad, miketheengineer, and Mikehaloran are all right. The problem with turning the bolt instead of the nut is that if you are supplied a torque spec from someone else for the nut being spun then depending on what friction modifiers are present at each end the propper torque could be...

Yes, but I still dont like it. if you can smooth the transition arround the hole it should help it last longer.

If you end up doing this I would suggest cutting not at the weld lines shown but parallell to them and cloder to the center of the valve. this should give you much more distance from where you weld to the seals you are replacing. I would be a bit concerned that the ball would seize and not be...

I would say yes as the tolerance is a maximum deviation. if the measurer has a resolution of .0005 and it reads .0005 off nominal then he is in tolerance. I would expect that the posible measurement error plus the deviation from nominal should be less than or equal to my tolerance. I think it...

I would suggest that if you would like your work to be added to by the open source community that you check out www.sourceforge.com and see what sort of interest is out there. what your talking about seems like it would be very useful especially since you have an understanding of the material...