[TriLUG] laptop cooling fan

[Carl Crider]

I think the idea is that the fan (spinning backwards) could cause a charge
(AC) and blow out the chip/controller on the fan. The bearings you listed
do spin both ways.




On Sat, Oct 27, 2012 at 3:01 PM, David Burton <ncdave4life at gmail.com> wrote:
> Who says that?
>
> There are several kinds of bearings used in these fans:
> - simple bronze sleeve bearings (cheap)
> - ball bearings (probably most common)
> - hydrodynamic (oil film fluid) bearings
>
> It is hard for me to imagine how spinning backward would affect the first
> two, but I don't know enough about the 3rd to have an opinion.
>
> Dave
>
>
> On Sat, Oct 27, 2012 at 2:38 PM, Neil L. Little <nllittle at embarqmail.com>wrote:
>
>> One thing we were told about using compressed/canned air when cleaning
>> dust bunnies is not to spin the propellers ... er fans in the opposite
>> direction. stick a toothpick or swab in the fan so it wont move and then
>> ... blow away to your hearts content. bad for the bearings.
>>
>> 73,
>> Neil Little, WA4AZL
>>
>> David Burton wrote:
>>
>>> They're pretty cheap at NewEgg:
>>> http://www.newegg.com/Product/**ProductList.aspx?Submit=ENE&N=**
>>> 100007639%20600028834&**IsNodeId=1&bop=And&Order=**PRICE&PageSize=50<http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007639%20600028834&IsNodeId=1&bop=And&Order=PRICE&PageSize=50>
>>>
>>> However, if your laptop is having cooling issues, the *first* thing you
>>> should do is to blow out the dust with canned air or an air compressor
>>> hose.  Just blast compressed air into each and every ventilation
>>> hole/grill
>>> on the bottom, back & sides of the computer.
>>>
>>> The second thing is to put the computer on a hard surface, so that
>>> ventilation holes on the bottom aren't blocked.
>>>
>>> Cooling pads are usually unnecessary.
>>>
>>> Dave
>>>
>>>
>>> On Fri, Oct 26, 2012 at 7:25 PM, Michael Rulison
>>> <13miketele at bellsouth.net>**wrote:
>>>
>>>
>>>
>>>> If one of you, by chance, has a flat cooling fan to place underneath a
>>>> laptop,
>>>> I'd be interested in buying a working one.
>>>>
>>>
>>>
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