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Re: [LUG] 7cm CPU fan

 

On Sun, May 29, 2011 at 12:45 PM, Gordon Henderson
<gordon+dcglug@xxxxxxxxxx> wrote:
> On Sun, 29 May 2011, Guy Backhouse wrote:
>
>> On Sun, 2011-05-29 at 11:06 +0100, Gordon Henderson wrote:
>>
>>> On Sun, 29 May 2011, David Bell wrote:
>>>
>>>> On Sunday 29 May 2011 10:33:05 Gordon Henderson wrote:
>>>>>
>>>>> On Sun, 29 May 2011, Henry Bremridge wrote:
>>>>>>
>>>>>> Current fan on wife's pc is dying, most of the small PC shops seem
>>>>>> closed
>>>>>> today (hardly surprising). Does anyone know of a shop open, today, in
>>>>>> the
>>>>>> South Devon Area that sells 7cm CPU fans
>>>>>>
>>>>>> CPU is a Athlon 2800 with an aluminium heat sink to which the fan is
>>>>>> screwed
>>>>>
>>>>> I have an 8cm one here if you want to pop over.. It might fit on just
>>>>> one
>>>>> corner which might get you going until you can source a proper one... I
>>>>> might have others - I'll have a look.
>>>>
>>>> Have you tried cleaning out any dust and fluff, then lifting the foil
>>>> cover to
>>>> the bearings and giving them a drop of thin oil?
>>>
>>> If you're lucky enough to get a fan with real steel bearings!!!
>>>
>>> These days they are mostly plastic and putting any sort of oil on them is
>>> a sure fire way of killing them instantly.
>
>> You may find silicon oil safe to use on those plastic/nylon type bearings,
>> the
>> problem is, I believe, the more traditional mineral oils react with and
>> swell up plastics?
>
> You need to make sure the silicone isn't carried in a solvent first - some
> of the spray ones are...
>
> However, I think it's really best to just throw them away and buy new -
> preferably spending a few more pennies on one with proper bearings.
>
> The plastic ones I've taken apart in the past have been a metal pin in a
> plastic bearing - they fail due to wear, or dust getting in and making them
> wear more. Then they get that classing buzzing/screeching noise as the
> pin/fan starts to rotate off centre - which only serves to increase wear,
> etc.
>
> Sadly PCs stopped coming with dust filters when production numbers went up
> and costs were driven down - mid 80's I suspect... Running PCs in a home
> environment really is bad for them - worse if there are smokers...
>
> One reason I like fanless...
>
> If you've not see it, check these:
>
>  http://www.theregister.co.uk/2009/11/13/ventblockers/
>  http://www.theregister.co.uk/2010/11/18/ventblockers_2/
>  http://www.theregister.co.uk/2010/11/26/ventblockers_2/

I feel sick!

>
> The place I hate going to most is a friend in Bristol who smokes heavilly
> and runs several PCs in his home/office... His PCs/servers really are
> disgusting inside )-:
>
> I have one of those portable Dysons - very handy for cleaning the inside of
> PCs!

I had heard (although I have done it myself) that cleaning a PC with a
vacuum was bad re: static? But if you do it, perhaps not...?

roly :-)

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