Hi,
less than 2 years ago the small (80 x 80 x 15 mm) fan on my Ultra 80's
DC-DC converter started playing up - making a lot of noise. I was never
able to find a *decent* replacement of the right size. 15 mm is very
thin, so the choice was severely restricted, despite me using catalogues
from lots of professional electronic suppliers. A 20 mm fan will not
fit, so I replaced it with a poor quality Sunon (not Sun) fan which I
bought from RS in the UK.

Sun don't sell a replacement fan as far as I can see, and I don't wish
to buy a new DC-DC converter just to replace a fan.

The fan has a hard time where it is. It is in the hot air stream, which
is not good for fans. The only one I could find had sleeve bearings,
which like the heat less than ball bearing fans. A ball bearing fan
would have half a chance in that position.

As you can guess, the fan has started to die again, less than 2 years
after replacing it.

Does anyone know of a source of these. Ideally I'd like

Decent quality, ball bearings
1) 12 V
2) 80 x 80 x 15 mm
3) Available to the UK.

The Ultra 80 is a well made machine, but the idiot who designed the bit
around the DC-DC converter wants shooting. The fan is very poorly
located being in the hot air stream, and being such an odd size it was
hard to find a replacement. I have not started looking for one today,
but judging by my experiences 2 years ago, finding one is not going to
be easy.

Anyone else had problems with that fan?
--
Dave K

Minefield Consultant and Solitaire Expert (MCSE).

Please note my email address changes periodically to avoid spam.
It is always of the form: month-year@domain. Hitting reply will work
for a couple of months only. Later set it manually.

HI,

Dave (from the UK) wrote:
> Hi,
> less than 2 years ago the small (80 x 80 x 15 mm) fan on my Ultra 80's
> DC-DC converter started playing up - making a lot of noise. I was never
> able to find a *decent* replacement of the right size. 15 mm is very
> thin, so the choice was severely restricted, despite me using catalogues
> from lots of professional electronic suppliers. A 20 mm fan will not
> fit, so I replaced it with a poor quality Sunon (not Sun) fan which I
> bought from RS in the UK.
>
> Sun don't sell a replacement fan as far as I can see, and I don't wish
> to buy a new DC-DC converter just to replace a fan.
>
> The fan has a hard time where it is. It is in the hot air stream, which
> is not good for fans. The only one I could find had sleeve bearings,
> which like the heat less than ball bearing fans. A ball bearing fan
> would have half a chance in that position.
>
> As you can guess, the fan has started to die again, less than 2 years
> after replacing it.
>
> Does anyone know of a source of these. Ideally I'd like
>
> Decent quality, ball bearings
> 1) 12 V
> 2) 80 x 80 x 15 mm
> 3) Available to the UK.
>
> The Ultra 80 is a well made machine, but the idiot who designed the bit
> around the DC-DC converter wants shooting. The fan is very poorly
> located being in the hot air stream, and being such an odd size it was
> hard to find a replacement. I have not started looking for one today,
> but judging by my experiences 2 years ago, finding one is not going to
> be easy.
>
> Anyone else had problems with that fan?

Is there no label on the original Fan so you can find a new one?

/miuchael

Farnell do a ball bearing fan 80x80x15,

code 1012768 £12.15
http://uk.farnell.com/jsp/endecaSear...=1012768&N=401

Description: FAN, 80MM 12VDC; RoHS Compliant:YES; Flow rate,
imperial:28.2cu.ft/min; Length / Height, external:80mm; Width,
external:80mm; Depth, external:15mm; Power consumption:2.04W;
Noise:30dB; Voltage, supply DC:12V; Bearing type:BB; Colour:Black;
Current rating:0.17A; Diameter, panel cut-out:92mm; Material:Plastic;
Speed range, max:2600rpm; Temperature, operating max:60°C; Temperature,
operating min:-10°C; Time, operating life:60000h; Voltage rating,
DC:12V; Voltage, supply DC max:13.8V; Voltage, supply DC min:6.0V;
Weight:50g

Code 1012771 £12.15
http://uk.farnell.com/jsp/endecaSear...=1012771&N=401

Description: FAN, 80MM 12VDC; RoHS Compliant:YES; Flow rate,
imperial:32.8cu.ft/min; Length / Height, external:80mm; Width,
external:80mm; Depth, external:15mm; Power consumption:2.76W;
Noise:34dB; Voltage, supply DC:12V; Bearing type:BB; Colour:Black;
Current rating:0.23A; Diameter, panel cut-out:92mm; Material:Plastic;
Speed range, max:3000rpm; Temperature, operating max:50°C; Temperature,
operating min:-10°C; Time, operating life:60000h; Voltage rating,
DC:12V; Voltage, supply DC max:13.0V; Voltage, supply DC min:6.0V;
Weight:50g

Dunno if this is what you are looking for.

Dave (from the UK) wrote:
> Hi,
> less than 2 years ago the small (80 x 80 x 15 mm) fan on my Ultra 80's
> DC-DC converter started playing up - making a lot of noise. I was never
> able to find a *decent* replacement of the right size. 15 mm is very
> thin, so the choice was severely restricted, despite me using catalogues
> from lots of professional electronic suppliers. A 20 mm fan will not
> fit, so I replaced it with a poor quality Sunon (not Sun) fan which I
> bought from RS in the UK.
>
> Sun don't sell a replacement fan as far as I can see, and I don't wish
> to buy a new DC-DC converter just to replace a fan.
>
> The fan has a hard time where it is. It is in the hot air stream, which
> is not good for fans. The only one I could find had sleeve bearings,
> which like the heat less than ball bearing fans. A ball bearing fan
> would have half a chance in that position.
>
> As you can guess, the fan has started to die again, less than 2 years
> after replacing it.
>
> Does anyone know of a source of these. Ideally I'd like
>
> Decent quality, ball bearings
> 1) 12 V
> 2) 80 x 80 x 15 mm
> 3) Available to the UK.
>
> The Ultra 80 is a well made machine, but the idiot who designed the bit
> around the DC-DC converter wants shooting. The fan is very poorly
> located being in the hot air stream, and being such an odd size it was
> hard to find a replacement. I have not started looking for one today,
> but judging by my experiences 2 years ago, finding one is not going to
> be easy.
>
> Anyone else had problems with that fan?

Dave (from the UK) wrote:

> Hi,
> less than 2 years ago the small (80 x 80 x 15 mm) fan on my Ultra 80's
> DC-DC converter started playing up - making a lot of noise. I was never
> able to find a *decent* replacement of the right size. 15 mm is very
> thin, so the choice was severely restricted, despite me using catalogues
> from lots of professional electronic suppliers. A 20 mm fan will not
> fit, so I replaced it with a poor quality Sunon (not Sun) fan which I
> bought from RS in the UK.
>
> Sun don't sell a replacement fan as far as I can see, and I don't wish
> to buy a new DC-DC converter just to replace a fan.
>
> The fan has a hard time where it is. It is in the hot air stream, which
> is not good for fans. The only one I could find had sleeve bearings,
> which like the heat less than ball bearing fans. A ball bearing fan
> would have half a chance in that position.
>
> As you can guess, the fan has started to die again, less than 2 years
> after replacing it.
>
> Does anyone know of a source of these. Ideally I'd like
>
> Decent quality, ball bearings
> 1) 12 V
> 2) 80 x 80 x 15 mm
> 3) Available to the UK.
>
> The Ultra 80 is a well made machine, but the idiot who designed the bit
> around the DC-DC converter wants shooting. The fan is very poorly
> located being in the hot air stream, and being such an odd size it was
> hard to find a replacement. I have not started looking for one today,
> but judging by my experiences 2 years ago, finding one is not going to
> be easy.
>
> Anyone else had problems with that fan?

Not that fan in particular, but I have found that small sleeve fans
typically need replacement or servicing every two years or so. IME
disassembling, cleaning, and relubricating is no less effective than
replacement - you still get to do it again in two years.

Sunny

Michael Laajanen <michael_laajanen@yahoo.com> writes:

>Is there no label on the original Fan so you can find a new one?

I have been fairly successful in googling part numbers to fix
replacement fans.

Casper
--
Expressed in this posting are my opinions. They are in no way related
to opinions held by my employer, Sun Microsystems.
Statements on Sun products included here are not gospel and may
be fiction rather than truth.

Michael Laajanen wrote:

>> Anyone else had problems with that fan?
>
>
> Is there no label on the original Fan so you can find a new one?
>
> /miuchael

I threw the "original" one a couple of years ago, when I replaced it
before. Although whether that really was the original, or one someone
else replaced, I don't know.

But I know then that the part number was not overly helpful. I found the
manufacturer and they sent me the specs, but they no longer sold that
fan, or any of the same size. At the time, Farnel in the UK did not sell
one, but RS did.

I just want to double-check the size again. My recollection is of it
looking smaller than 80 mm, but that is what I seem to have refered to
it before in previous newsgroup posts a couple of years back.

http://groups.google.co.uk/group/com...55cda7e2c65180


--
Dave K

Minefield Consultant and Solitaire Expert (MCSE).

Please note my email address changes periodically to avoid spam.
It is always of the form: month-year@domain. Hitting reply will work
for a couple of months only. Later set it manually.

graham salkin wrote:
> Farnell do a ball bearing fan 80x80x15,
>
> code 1012768 £12.15
> http://uk.farnell.com/jsp/endecaSear...=1012768&N=401
>
>
> Code 1012771 £12.15
> http://uk.farnell.com/jsp/endecaSear...=1012771&N=401

Thanks for that. I know when I looked a couple of years ago, Farnel did
not do one, but RS did. It seems to have reversed now.
--
Dave K

Minefield Consultant and Solitaire Expert (MCSE).

Please note my email address changes periodically to avoid spam.
It is always of the form: month-year@domain. Hitting reply will work
for a couple of months only. Later set it manually.

Casper H.S. Dik wrote:
> Michael Laajanen <michael_laajanen@yahoo.com> writes:
>
>
>>Is there no label on the original Fan so you can find a new one?
>
>
> I have been fairly successful in googling part numbers to fix
> replacement fans.
>
> Casper

I did do this a couple of years ago, and while it was useful, it did not
totally solve the issue. I managed to find the manufacturer (Nidec), who
confirmed they no longer sold any fans of that size (80 x 80 x 15 mm).
The fan ID was H34612-55 Also marked on the fan was 9127V, 12 V, 0.18 A.

I'm led to believe the "original" fan moved 0.97 m^3/min,

The replacement I bought back in 2004 was 1.6 W (~133 mA), 31.5
m^2/hour (~0.525 m^3/min), clearly moves little more than half the air
of the original one.

Still, the ones from Farnell look a bit more hopeful. I'll buy a couple,
as experience is telling me they will not last long.


--
Dave K

Minefield Consultant and Solitaire Expert (MCSE).

Please note my email address changes periodically to avoid spam.
It is always of the form: month-year@domain. Hitting reply will work
for a couple of months only. Later set it manually.