I've got a number of fairly high-quality DC fans (Papst, NMB,
Panasonic), some of which are "Smart Fans" that I don't want to lose.
All are plastic construction, not die-cast metal.
I've noticed that on several, the supporting struts between the motor
and frame have developed fractures. I've done some repairs with
epoxy that seem to be holding.
The body of these things seems to be made of some sort of polyamide
(nylon?) with a lot of filler. The usual solvents (e.g. methylene
chloride) don't make a mark, so solvent cement appears to be out of
consideration.
Am I wasting my time with 20 and 30 year old fans? Should I just
scrap the lot and chalk the loss up to age? Experience of others
would be much appreciated.
--Chuck