fan bearing grease?

[N_Cook]

12V, .2A, seized up due to the grease , cleaned it all out and runs fine but
what , if any, grease to replace it with?
Simple sleeve bearing .

 

[mike]

12V, .2A, seized up due to the grease , cleaned it all out and runs fine but
what , if any, grease to replace it with?
Simple sleeve bearing .

I use heavy gun oil.
Most of the fans I fix are not frozen, but loose and noisy.
The heavy gun oil stays in the gap better than the thin stuff.
For fans without the plastic plug, an insulin syringe filled with
oil will inject right thru the label, often without removing the
fan from the box.

 

[N_Cook]

It's not grease, it's oil. The reason it seems thick is that pieces
of plastic or rubber shavings have conaminated the oil.

I use whatever thin oil I happen to find on the shelf. It's not a
critical application. If you want quality, get some PTFE or silicone
lube that can handle high temperatures. Do NOT use 3-in-one oil,
which is a vegetable lube and will turn to tar if hot.

The real trick to fixing the fan is push the rotor in and out like a
piston to dislodge any accumulated crud in the bushing. However, if
the rotor seems to wobble after oiling, it's probably too far gone to
save.

Marginal, but interesting:
<http://www.noisy-computer-fans.co.uk/>

--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831-336-2558
# http://802.11junk.com [email protected]
# http://www.LearnByDestroying.com AE6KS

I will give a dab of molybdenum grease a go, as I have a tub of it, intended
for military use. Although called grease it looks more like oil and migrates
everywhere, including uphill , and is certainly high temperature
formulation. No sign of wear or wobble

 

[amdx]

12V, .2A, seized up due to the grease , cleaned it all out and runs fine but
what , if any, grease to replace it with?
Simple sleeve bearing .

Sewing machine oil.
Mikek