I need a blower

JTknives

JTknives

Joined
Jun 11, 2006
Messages
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well i am getting ready to assemble my pid controlled forge and i think i need another blower. the one i have is made from a vacuum motor and it is controlled by a varac that controls the voltage. but i tried a fan speed controller that stacy sent to me and it does not change the speed very much at all. so i guess i need a new blower as i need it to be able to be controlled with a fan speed controller. where would i find a good one that's not very expensive. and what kinda cfm do i need?
 
nope, those are hand crank without even looking....but he got some real nice stuff......check it out

i'd say a used appliance store. i got mine for $7 and used it for about 3 or 4 years.

or ya can steal someones giant snow globe they got a couple good ones inside.
 
Call around your local heating and air shops JT. Tell them you're looking for a used draft inducer assembly off of a scrap furnace. Should be able to get several for free this time of year.
 
Bathroom exhaust fans will work. If your going to be doing a lot of damascus I would get a more powerful blower but for regular hand forging blades and ax heads mine works just great. First forge I made burnt coal and used a bathroom exhaust fan that was left after a bathroom remodel. I hooked it up to a light dimmer and I could control the air flow just fine. The fan I use now has just got a baffle to control air flow. Nice thing about the bathroom exhaust fans is they are pretty quite. I picked my latest one up at Home Depot for around $14.00.
 
mine's a blower off a gas hot water tank it blew on the vent pipe to keep cool


andrew
 
Man, I apologize in advance for the next line...

I saw the title of the thread and thought "JT and Barbara broke up, oh no!!!"

Sorry. By the way, you can find some pretty good deals on a fairly high CFM blower on eBay. I picked one up, I think it was like 200 CFM for around $25 plus $10 for shipping.
 
JT,
Many folks use a blower that could power a dust extractor. You only need enough air to mix with the fuel at the desired ratio. Extra just blows the flames out the port and makes for a oxygen rich atmosphere. I have found 60-80 CFM to be plenty for most applications.100CFM is more than enough, unless you are making damascus or melting metal.

try something like this:
http://cgi.ebay.com/FASCO-DRAFT-IND...5|66:2|65:12|39:1|240:1318|301:1|293:6|294:50

or this:
http://cgi.ebay.com/ebaymotors/JABS...9939092QQptZBoatQ5fPartsQ5fAccessoriesQ5fGear

Or if you really want a FAN try this:
http://cgi.ebay.com/Hartzell-Indust...|66:2|65:12|39:1|240:1318|301:0|293:12|294:50

My favorite supplier doesn't seem to be onebay anymore. He sold these medical blower units that were taken out of operating rooms in some sort of refitting. They are superb for forges, and cost about $15 each. Luckily, I bought several while they were still available.

Stacy
 
TekSec said:
Man, I apologize in advance for the next line...

I saw the title of the thread and thought "JT and Barbara broke up, oh no!!!"

Sorry. By the way, you can find some pretty good deals on a fairly high CFM blower on eBay. I picked one up, I think it was like 200 CFM for around $25 plus $10 for shipping.
Click to expand...

OH JEEEEEZ Erik, I was waiting for someone to make that joke, oh that was baaaad :D
 
The blower I ended up with was a little more expensive than I wanted but, I grew tired of looking for a good deal and broke down... The blower I ended up with was from Electric Motor Warehouse --> 50747-D500 Fasco Blower for $57.65. It is a 70 CFM blower and delivers more than enough air. According to Don Fogg's site, you only need a 50 CFM or less. Found this to be quite true. I also got a variable speed controller on the same site. I do not remember what I paid.

Eric
 
Da Bomb is an understatement! With about 200 PSI fuel this might just be the blower for the ultimate forge.
Stacy
 
I ended up getting a nice Dayton blower off local Craigslist for cheap. I know that Grainger sells them for not a whole lot.
 
My recommendation is to go with one of the blowers on the link Sam listed. I've had one for the past 5 years on my welding forge, and never a moment of problems.

Prior to that I used those "squirrel cage"/shaded pole type blowers and was replacing them about every three months. What I finally found out was they are not designed to handle ANY back pressure, which is what you have in a gas forge situation.....the back pressure causes those type blowers to blow less air, and over heats the motor very quickly...causing them to fail.

If your only forging once or twice a week, you might get by, but any more than that and you'll be spending that money over and over. Get a good one to start and it will be there for a LONG time.
 
Ed Caffrey said:
My recommendation is to go with one of the blowers on the link Sam listed. I've had one for the past 5 years on my welding forge, and never a moment of problems.

Prior to that I used those "squirrel cage"/shaded pole type blowers and was replacing them about every three months. What I finally found out was they are not designed to handle ANY back pressure, which is what you have in a gas forge situation.....the back pressure causes those type blowers to blow less air, and over heats the motor very quickly...causing them to fail.

If your only forging once or twice a week, you might get by, but any more than that and you'll be spending that money over and over. Get a good one to start and it will be there for a LONG time.
Click to expand...

now with that blower will i be able to control the speed with a fan speed controller
 
You can't use a light rheostat, it will burn up the blower.... BUT, If you step up to a ceiling fan speed controller (basically the same things, but much more heavy duty, and costs about $20) it works great. Mine has been wired to a ceiling fan speed controller since day one. I leave the gate wide open and control the blower speed through the ceiling fan speed controller.
 
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