I'm looking for a CHEAP squirrel cage type blower. When I didn't need
one it seems they were everywhere in all my surplus catalogs, now no
cheap ones to be found. Wish I could give a size and CFM but I don't
know exactly, it's a hit and miss operation for a home made waste oil
heater. I'm guessing from seeing others that it's about 250 to 400 CFM.
A little over sized so I can adjust the air sort of like a normal oil
heater. I know this isn't much to go on, but maybe some of you have
different surplus catalogs with blowers? Appreciate all leads.
400 CFM sounds like you'd want something off a furnace.
Might be a bit larger than you need. I've bought stuff from
American Science and Surplus, and been pleased with them.
Somehow I changed 200 into 400 walking from the kitchen to the pc. I
was looking at my oven hood exhaust fan label, not that it's a squirrel
cage just for the CFM. It's 200 CFM and I think that would be plenty
for my project. Better a little oversized then I can add a motor speed
controller to fine tune it.
I'm guessing what you actually want is a tangential fan/blower with an
squirrel cage motor (a step up from a shaded pole motor).
The term "squirrel cage" refers to the type of rotor used in an induction
motor, as shown in the following diagram:
If you are looking for a CHEAP version, many (older) microwaves used a
tangential fan to cool the transformer and tube, and you can often get the
ovens for free or nearly free if they are broken/too large/too old.
This picture shows a typical uwave blower of that type:
Note: if you do acquire an old uwave with the intention of taking it apart,
be DAMNED SURE you discharge the internal capacitor, as it can store a
lethal 2400 VDC charge. For more on safely disassembling a uwave, go here:
Good luck, and please keep us up to date on your progress.
Well I learned something new today! I always thought the tangential fan
was the squirrel cage. I'm guessing a lot of people have that wrong (I
hope I'm not the only one). But I have to know, what is that thing in
the picture? Sort of looks like part of what I hope to build.
Yes, it is not only a common mistake, it seems to be so common as to nearly
warrant calling such a fan by it's mistaken name.
As to the picture, I don't know what it is, I found it by doing a GIS for
"microwave blower." The actual album can be seen here:
How CHEAP? There's the Blue Blower which is around $80.
There's a lot of surplus squirrel cage blowers but most are around 25-30
cfm, and were used for cooling electronic equipment.
Look at eBay and search for FASCO MOTOR BLOWER A071, but it's smaller
than you're looking for if your guess about CFM is correct.
Also "http://skycraftsurplus.com/12to24vdcfan-squirrelcageblower.aspx "
but I guess that's too small.
That's where I bought mine, its a 1/4 HP, 2 speed. Built a downdraft
roll-around cabinet table that uses three furnace filters. The slower
speed is very quiet with a strong pull.
Try discarded appliances, auto junkyard, furnace parts, etc depending
on your application.
Go to any local heating company. They replace furnaces all the time.
Most of the blowers are still good, and they are probably happy to get
a few bucks to get rid of one.
I needed a few of them last summer when we had an extreme heat spell,
and my livestock were suffering in the barn. Commercial barn fans are
expensive, I got 3 used squirrel cage fans from old furnaces, at a
local heating company, for $10 each. They work just as well as
commercial fans, but I always encase them in hardware cloth, just so
none of my cats get chopped up, or a neighbors kid comes around.
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