[time-nuts] 53132 replacement fan

[Chuck Harris]

Works to a point, but there are two bearings in every
such fan that I have ever seen.  Only the truly small
fans have a single bearing (think CPU/GPU fan in your
PC).

The typical arrangement found under the label is a
clip (metal or plastic), a washer, a ball (or
sleeve) bearing, a spring, another ball (or sleeve)
bearing, a washer, and then finally the armature.

You have to remove the label, remove the clip from the
shaft, and the fan and hub will slide off.  Then you
lube *both* bearings and reassemble.

-Chuck Harris

David G. McGaw wrote:
> I will point out that I have rejuvenated many a fan by peeling off the round label
> covering the bearing and adding a small amount of oil.
> 
> David N1HAC
> 
> 
> On 11/21/16 12:57 PM, jimlux wrote:
>> On 11/21/16 6:39 AM, Charles Steinmetz wrote:
>>> Tom wrote:
>>>
>>>> EFB0412MD
>>>> Airflow 7.17 CFM
>>>> 6300 RPM
>>>> Noise 24 dBA
>>>>
>>>> FBK04F12U
>>>> Same exact form factor.
>>>> Air Flow 9.2 CFM
>>>> 9500 RPM
>>>> Noise 42 dB(A)
>>>
>>> Note the 18dB greater noise (that's a HUGE difference).  Even with bad
>>> bearings in the original fan, it is probably considerably quieter (by
>>> 10dB or more) than the proposed replacement.  On the other hand, the
>>> replacement moves 28% more air, which may be a good thing.
>>>
>>
>> That's a 40mm fan, which is a standard size, I'll bet you can find a slower
>> turning/quieter fan.
>>
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