I got some Comair Rotron fans, that fit the spindle motors on some of
my CNC machines..
They lasted about a week, before the plastic fins/body split/cracked,
and they failed. Noisily.
I thought the first set was a fluke, so I changed to another, and sure
enough, the next set failed too.
I just got off the phone with a friend who services Radio, and TV
transmitters, and he was complaining about replacing Comair Rotron
fans in the transmitters, except when they fail it takes out several K
$ worth of tranmitter modules. Again, he was seeing about week of life
expectancy.
These fans were all Hecho en Mexico.

Any ideas about high quality, Reliable muffin fans? Brands to avoid,
or to prefer?
Are all the others made in China, from recycled trash bags now days?

These IIRC are the 6-7" fans.

Half-Nutz wrote:

I got some Comair Rotron fans, that fit the spindle motors on some of
my CNC machines..
They lasted about a week, before the plastic fins/body split/cracked,
and they failed. Noisily.
I thought the first set was a fluke, so I changed to another, and sure
enough, the next set failed too.
I just got off the phone with a friend who services Radio, and TV
transmitters, and he was complaining about replacing Comair Rotron
fans in the transmitters, except when they fail it takes out several K
$ worth of tranmitter modules. Again, he was seeing about week of life
expectancy.
These fans were all Hecho en Mexico.

Any ideas about high quality, Reliable muffin fans? Brands to avoid,
or to prefer?
Are all the others made in China, from recycled trash bags now days?

These IIRC are the 6-7" fans.

Considered Papst ?

Graham

In article , Half-Nutz wrote:
I got some Comair Rotron fans, that fit the spindle motors on some of
my CNC machines..
They lasted about a week, before the plastic fins/body split/cracked,
and they failed. Noisily.
I thought the first set was a fluke, so I changed to another, and sure
enough, the next set failed too.
I just got off the phone with a friend who services Radio, and TV
transmitters, and he was complaining about replacing Comair Rotron
fans in the transmitters, except when they fail it takes out several K
$ worth of tranmitter modules. Again, he was seeing about week of life
expectancy.
These fans were all Hecho en Mexico.

Any ideas about high quality, Reliable muffin fans? Brands to avoid,
or to prefer?
Are all the others made in China, from recycled trash bags now days?

These IIRC are the 6-7" fans.


Pabst are about the best with metal blades. You didn't mention voltage.
Fans should not suck hot air. They should always suck cool air,
else they will not last long. Any fan in high temp will not last long.

greg

GregS wrote:

Fans should not suck hot air. They should always suck cool air,
else they will not last long. Any fan in high temp will not last long.

All too right. Pressure differentials are important too as is the airflow path.

Graham

Half-Nutz wrote:
I got some Comair Rotron fans, that fit the spindle motors on some of
my CNC machines..
They lasted about a week, before the plastic fins/body split/cracked,
and they failed. Noisily.
I thought the first set was a fluke, so I changed to another, and sure
enough, the next set failed too.
I just got off the phone with a friend who services Radio, and TV
transmitters, and he was complaining about replacing Comair Rotron
fans in the transmitters, except when they fail it takes out several K
$ worth of tranmitter modules. Again, he was seeing about week of life
expectancy.
These fans were all Hecho en Mexico.

Any ideas about high quality, Reliable muffin fans? Brands to avoid,
or to prefer?
Are all the others made in China, from recycled trash bags now days?

These IIRC are the 6-7" fans.

Good morning,

I'll second the other poster who suggested Pabst fans. I've also had
decent luck with Panasonic fans which are available from Digikey
(www.digikey.com) Otherwise, why not get the same as the original ones,
if they had lasted for many years?



Regards,
Tim Schwartz
Bristol Electronics