Some parts in the Hasselblad camera body are 'greased' with a slight touch of graphite powder, just enough to do the job and not to wander around in the mechanics chamber. This is done when the camera is produced in the factory, for the rest of their life, these parts do not need any oiling.
Other parts are made of, what is called, self greasing bronze (I do not know if this is the right expression in English), that is bronze, once heated, is cooled in a special oil-bath. This is an old trick used in the bush and roll bearings of steam locomotives and meant to stand heavy use and last for ever...
Others are made of dural and are, in factory, polished with rice powder or horse tail hear to be as smooth as possible to avoid wear.
If I have the time, I will look for that old Hasselblad folder telling all about it.
If one man should make a 500C/M, and produce all the parts one by one, it would take him about one year...
CLA a Hasselblad is a professionals job.
Good luck,
Philippe