30 ft-lb == 40 Nm
Sure you're reading the right scale?
Did you post this in the right thread? None of the postings above refer to a torque spec for anything.
To the OP; stop in any LBS, preferably a well established one, and ask if they have any trashed wheels or hubs? I've had no problem getting old hubs from my LBS for free that were actually quite usable when overhauled. They just give be a large cardboard box of parts and say "take what you want."
Also, be aware there are two types of hub bearings. All Shimano, Campy and several others use loose bearing balls and cup-and-cone races. These are easy to overhaul and relube.
Other hubs use cartridge bearings which are pretty much unservicable. You run them until they are rough and replace the bearing cartridges with new ones from an LBS or bearing supply house.