Sleeve & ball bearings fan

[eltan]

What is the difference between the sleeve & ball bearings fan?

Which is better in terms of price, life extand & noise level?

Its for motherboad chipset fan.

Thanks in advance

eltan

 

[Trevor Wilson]

What is the difference between the sleeve & ball bearings fan?

Which is better in terms of price, life extand & noise level?

**USUALLY, ball bearing fans last longer, but sleeve fans are quieter.
Personally, I put in BIG fans (120mm+) and run them slow. You get more air
moved, at lower noise levels and much better longevity. Particularly with
synchronous motor fans.

 

[Lord Garth]

What is the difference between the sleeve & ball bearings fan?

Which is better in terms of price, life extand & noise level?

Its for motherboad chipset fan.

Thanks in advance

eltan

Ball bearing are better but more costly.
If noise is a problem, use bushings to suspend and isolate the fan
from its mounting surface.

 

[Phil Allison]

"eltan"

What is the difference between the sleeve & ball bearings fan?

** The former enthuses and waxes lyrical over the simplicity and ruggedness
of a hard bronze tube as a bearing for a steel shaft while the latter deems
that only the precision and technical elegance of ball race bearing will do.





............ Phil

 

[Allan]

Ball bearing are better but more costly.
If noise is a problem, use bushings to suspend and isolate the fan
from its mounting surface.

I notice WES sell a Ceramic Bearing fan.
Anyone had experiences with them

 

[Bushy]

You get about twice the airflow from the ball bearing fan, so if you want to
keep things cool, spend the 10% more and get the quality fan.

Hope this helps,
Peter

 

[Phil Allison]

"Bushy"

You get about twice the airflow from the ball bearing fan,

** What a **BIG** lie !!!




............... Phil

 

[Phil Allison]

"Mike Harding"
"Phil Allison"

Do you not see Phil that such a post is why so many
people dislike you?

** No - it is why I am so well respected.

I tell the simple truth.

You oughta try it sometime arsehole - make a nice change.

It's not a lie - it may be a mistake, or an error or a silly
comment but Bushy did not _lie_........

** YOU need to see a damn dictionary - fuckhead.

A "lie" = a falsehood.

Bushy is spreading a seriously dumb falsehood.

- he, probably, just
got something wrong - and that's people for you Phil,

** Ummm - you mean like ***YOU** just did ????????

they do that often - even you do - and you should
gain enough maturity to understand that and not be
so unpleasant about our fallibilities.

** I just saw exactly how "pleasant" you are when you IMAGINE you see a
mistake.

No example for anyone to learn from.


What a FUCKING puffed up hypocrite Mike Harding invariably proves to be.




............... Phil

 

[Bushy]

A "lie" = a falsehood.

Bushy is spreading a seriously dumb falsehood.

Phil, I use a lot of these fans, the stock standard 5 inch size and I have
used them from every supplier from tricky dicky to farnell to the oem swiss
made fans for the thermally controlled oven compartment on a range of
scientific equipment, and the free air, air circulation of the ball bearing
fans far exceeds the bushed ones. There is a substantial difference in the
rpm that the fans reach as well. If you care to show me why you think this
is a falsehood, I'll be HAPPY TO SIT DOWN AND HAVE A DRINK WITH YOU.

For the original poster, you can buy the same size fans with the same motors
and different bearings from Dick Smith. The difference between these two
fans when you wire them both up and compare the flow the ball bearing one
wins hands down. As I then charge like a wounded bull to come back every six
months and service these machines, that each have at least six fans in a 38
degree oven, I find that after continious use the ball bearings have a much
greater lifespan, typically 2 years mtbf compared to 4 years mtbf.

Thanks for the vote of confidence Mike! (I think! ;<)

Hope this helps,
Peter

 

[Phil Allison]

"Bushy"

** Replacing the context the lying Bushy removed:

"You get about twice the airflow from the ball bearing fan, so if you want
to
keep things cool, spend the 10% more and get the quality fan."

Phil, I use a lot of these fans,

** So do I - you are not alone in having experience.

There is a substantial difference in the
rpm that the fans reach as well.

** Shame the makers (ie like Papst) specs show NO difference in rpm or air
flow at all.

The Papst BB versions have a slightly wider operating temp spec.

If you care to show me why you think this
is a falsehood, I'll be HAPPY TO SIT DOWN AND HAVE A DRINK WITH YOU.

** Fine - the friction of a BB and and SB at a few thousand rpm is
***tiny*** in both cases.

For the original poster, you can buy the same size fans with the same
motors
and different bearings from Dick Smith. The difference between these two
fans when you wire them both up and compare the flow the ball bearing one
wins hands down.

** Easy to say - but even if true, not proof of your sweeping
comment.

As I then charge like a wounded bull to come back every six
months and service these machines, that each have at least six fans in a
38
degree oven, I find that after continuous use the ball bearings have a
much
greater lifespan, typically 2 years mtbf compared to 4 years mtbf.

** Sleeve bearings do not *rust* - BBs do.

With gear that is stored and used intermittently ( ie like audio power amps)
the BBs one **** out way sooner.

Thanks for the vote of confidence Mike! (I think! ;<)

** Mike actually said he thought you were wrong.

He merely objected to the word "lie'.

Like the anal, pedantic, stinking prick that he is he has no idea what
ordinary words mean.





.............. Phil

 

[eltan]

Thanks all who reply, but it seem from all other posts, its not about the
chipset fan (ie the fan on the controller chip such as VIA KT400A on the
motherboard).

Thanks once again.

 

[Spajky]

** What a **BIG** lie !!!

I agree, but not completely!

ball bearing fans last longer, but their bearings by time get noisier
& sleeve bearings one tend to start rattle after time. The solution
for long term resolving the problem is to fill under brand sticker of
all types of fans in the bearings hole half of it with heavy lithium
automotive grease as soon as you buy it! True is that is gonna spin
about 10 - 15% slower at nominal voltage ...

 

[Jason James]

What is the difference between the sleeve & ball bearings fan?

Which is better in terms of price, life extand & noise level?

Its for motherboad chipset fan.

Thanks in advance

eltan

Check out:
http://www.currentsolutions.com/knowledge/ballbearingvssleevefans.htm

This dude did an experiment on the two types,....no prizes for which one
lasted longer,...unless the gear is operating outside the igloo.

Jason

 

[Mike Harding]

"Bushy"

** What a **BIG** lie !!!
.............. Phil

Do you not see Phil that such a post is why so many
people dislike you?

It's not a lie - it may be a mistake, or an error or a silly
comment but Bushy did not _lie_ - he, probably, just
got something wrong - and that's people for you Phil,
they do that often - even you do - and you should
gain enough maturity to understand that and not be
so unpleasant about our fallibilities.

Mike Harding

 

[Howard Hughes]

You get about twice the airflow from the ball bearing fan, so if you want
to
keep things cool, spend the 10% more and get the quality fan.

What rot ! at the same rpm with the same fan size,you get the same airflow.


And if you think you are saying that at the same current/power, the ball
bearing fan of the same size will run so fast as to double air flow, no way
!

 

[Howard Hughes]

Phil, I use a lot of these fans, the stock standard 5 inch size and I have
used them from every supplier from tricky dicky to farnell to the oem
swiss
made fans for the thermally controlled oven compartment on a range of
scientific equipment, and the free air, air circulation of the ball
bearing
fans far exceeds the bushed ones. There is a substantial difference in the
rpm that the fans reach as well. If you care to show me why you think this
is a falsehood, I'll be HAPPY TO SIT DOWN AND HAVE A DRINK WITH YOU.

You are being accidentally decieving, if you are fully aware of what you are
doing.
You are comparing apples and oranges.

A low power low rpm and hence low air flow fan doesnt need ball bearings.

You are just finding that if you pay four times as much you get twice as
much...

Your original statement was that ball bearing fans can do better than
sleeve bearing fans.

You can buy the sleeve bearing fan to do the same air flow.
Its just that in your purchasing , you havent found them.


Look, Ford's are faster than Holdens.
My falcon XR6 beats your barina. The conclusion is clear.

 

[Bushy]

You can buy the sleeve bearing fan to do the same air flow.

Its just that in your purchasing , you havent found them.

OK, I know the brands I have tried and tested, perhaps you can identify the
one you are referring to so I can try them as well.

Of the models that I have tried, two different manufacturers have had both a
bushed and a bearing model to choose from, the motors were the same wattage
rating, the fans and housings were the same mold and material, only the
bearings, pricetag and the airflow were quite different.

The price was a difference of maybe 15 percent, and the airflow was better
by greater than that amount. I have removed the cover from the fans and
lubricated them with a variety of oil or oil like compounds and although
this has improved the performance of the bushed units for a period of time,
the result was that as the lubrication deteriorated, the bushed fans dropped
in revs and airflow.

I am using these fans 24 hours a day, seven days a week at 100 percent duty
cycle as the circulation fans in a temperature controlled oven at 38 degrees
C and they are mounted vertically so the shaft and airflow is in a
horizontal direction. If the axis of the fan was mounted pointing up or down
then the fan bushes may wear differently. Failure mode on the fans I have
tried has been due to increased wear in the bush on the bottom side where
the weight of the shaft is supported. They wind up with an oval hole that
increases drag and although they can be run for a while by lubricating and
turning them upside down and wearing against the other face of the bush,
this will only give a little service until I am able to return to replace
the bushed fan with a decent ball bearing model.

Quite frankly, I'm only reporting on my experience and my customers are
happy to pay me a fortune to replace fans!

Hope this helps,
Peter

 

[KLR]

What rot ! at the same rpm with the same fan size,you get the same airflow.

it also depends a LOT on the number of and the pitch of the blades on
the 2 fans in question that you are comparing.

 

[Jason James]

OK, I know the brands I have tried and tested, perhaps you can identify the
one you are referring to so I can try them as well.

Of the models that I have tried, two different manufacturers have had both a
bushed and a bearing model to choose from, the motors were the same wattage
rating, the fans and housings were the same mold and material, only the
bearings, pricetag and the airflow were quite different.

The price was a difference of maybe 15 percent, and the airflow was better
by greater than that amount. I have removed the cover from the fans and
lubricated them with a variety of oil or oil like compounds and although
this has improved the performance of the bushed units for a period of time,
the result was that as the lubrication deteriorated, the bushed fans dropped
in revs and airflow.

I am using these fans 24 hours a day, seven days a week at 100 percent duty
cycle as the circulation fans in a temperature controlled oven at 38 degrees
C and they are mounted vertically so the shaft and airflow is in a
horizontal direction. If the axis of the fan was mounted pointing up or down
then the fan bushes may wear differently. Failure mode on the fans I have
tried has been due to increased wear in the bush on the bottom side where
the weight of the shaft is supported. They wind up with an oval hole that
increases drag and although they can be run for a while by lubricating and
turning them upside down and wearing against the other face of the bush,
this will only give a little service until I am able to return to replace
the bushed fan with a decent ball bearing model.

Quite frankly, I'm only reporting on my experience and my customers are
happy to pay me a fortune to replace fans!

Hope this helps,
Peter

Bushes don't seem to give the same service life as a ball- bearing. Bushes
are sintered or porous so they can be loaded with oil for lubrication. Once
the oil dissapates, the shaft has metal on metal contact with the bush. This
causes the bushes surface to become scuffed and effectively closes off the
porosity. Re-oiling does not help for long once the bush has been damaged in
this way as it has no way of holding the oil.

Jason

Jason

 

[TonyP]

it also depends a LOT on the number of and the pitch of the blades on
the 2 fans in question that you are comparing.

Yep, which has exactly nothing to do with the bearing type.
It is my experience that cheaply made fans are usually sleeve, and better
made fans are often ball. However a well made sleeve fan may last longer
than a crappy ball bearing fan. Ditto for noise, either way. As usual you
should consider all relevant details, not just focus on one thing.

TonyP.