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I have been looking at this Japanese company that makes automatic door closers with spring assist. here is a link to their catalog. I have seen many designs come out of Japan that require great precision and "work" as intended but only if installed perfectly. Also, there is something quirky...

I there a way to create an animation where an end face cam rotates about an axis and a follower rises and falls depending on the cam shape(obviously)? Thanks for any input. http://www.mmtech.us

I have FEMAP 10.3 Is there a way to model a pendulum whose pivot pin is in a high viscosity fluid? I would like to vary the pin and holes' clearance with the high viscosity between the two. Thanks for any guidance http://www.mmtech.us

Yes, I am well aware of the clearances. I control them extremely well. The real point of my question was more of grease/material compatibility. http://www.mmtech.us

Ok, thanks for the suggestions. I 'll go to test. http://www.mmtech.us

I have a 12l14 ground stock shaft (soft) engaged in an aluminum reamed housing(2") depth 3/8" nominal diameter. It is a reamed hole finish with no coatings. The aluminum is 6063-T6. the shaft/ hole combination has .0005-.001 clearance and will rotate intermittently in a randomly used test...

Is anyone using 15-5 stainless as a spring? Since 17-7 is tough to get, I was wondering if anyone has had success & if they have a hardening and tempering process to get the material to RC44-51. The spring is low deflection (.015") max and is flat. Thanks for any help.

I was looking to buy some 1" thick plate stock 17-7PH steel in very small quantities. Anyone have a supplier? Thanks,

Unclesyd: Is the the heat treatment process you describe for 4130 or 1050?

Is there a source for small quantities of duplex grade 2205 rod ~3/8 diameter?

Bayer Texin 285,texin 985, desmopan