so yeah, for my final year uni project ive gotta design a vacuum seal on a shaft that will be spinning at a max speed of 68000rpm
and also design a gearbox that has a 17:1 ratio, going from a max of 4000rpm to 68000rpm

as i currently know pretty much nothing about gear and seal design at the moment im wondering if anyone on here has any experience with anything even removelty like this

right now im just trying to figure out the basics of both these topics but searching the internet for seal information is proving rather hard. As im not finding a whole heap of info on seals for rotating shafts

so basically i need to find out

-the type of seal to cope with the high speed
-the material to make said seal out of
-type of gears to use
-material to make the gears from
-arrangement of the geartrain

so yeah once again, anyone with any kind of experience with anything remotely like this it would be great to hear from you