Forge Blowers

J. Keeton

J. Keeton

Joined
Nov 15, 2005
Messages
1,218
Hey guys, I haven't been on these forms in a while. Schools been in the way... anyways.

I'm building a forge for a buddy and he's opting to go cheap. When I built my forge I used the 112 cfm blower from blacksmithingdepot.com.

I was curious if yall knew of any smaller blowers that would do the trick for a small single burner gas forge.

I came across this one. It's a 50 cfm blower. Would it do the trick? http://www.greenhousemegastore.com/Inflation-Blower-50-CFM/productinfo/FA-IB/

Thanks

P.S: THe forge I'm building for him is going to look pretty close to mine, minus the crazy piping. (Pic Below)

 
I don't know how much air my blower moves, but it seems to get the job done with plenty of air to spare. Anyways, the point is, if you're going for untra cheap, I suggest do you do what I did and pull the blower out of an old gas furnace. Its identical to what is used, so you know it can handle the load. Plus, the wiring tends to be pretty easy. Only two wires to hook up. Its made from thermoplastic thats fire resisitant and extremely light, but tough.
 
That little blower won't work.I bought one for 50 bucks, put it on my forge and then had to get the one from Blacksmithm Depot.
Luckily a guy was build ing a small forge,coffee can size and it worked for him.
Stan
 
Not sure, but how much CFM does a hair dryer move? Been using on one my forge for years, and it isn't a coffie can forge eigther, it's a little bigger than the old freon bottle I used to use, finaly burnt the last of them up and was looking for a bigger design.

It used to be a venturi design, but I wanted a little hotter and qicker heat so I changed the gas port size and taped a hair dryer to it. Like the ones with the high and low settings, that way I can have two heat modes and play with gas pressure and get a little better efficency out of it.

Here's a couple of pics. I use hard fire bricks front and rear to close off or open up as needed.
 

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I was using 100 CFM blower on mine (6x9 inch interior), but it was too much for the size of the chamber.
 
Will52100 said:
Not sure, but how much CFM does a hair dryer move? Been using on one my forge for years, and it isn't a coffie can forge eigther, it's a little bigger than the old freon bottle I used to use, finaly burnt the last of them up and was looking for a bigger design.

It used to be a venturi design, but I wanted a little hotter and qicker heat so I changed the gas port size and taped a hair dryer to it. Like the ones with the high and low settings, that way I can have two heat modes and play with gas pressure and get a little better efficency out of it.

Here's a couple of pics. I use hard fire bricks front and rear to close off or open up as needed.
Click to expand...

Boy!!!! That's one Redneck Forge you got there Will. HEHEHEHEHE!!!!
 
I know this is a really old post but I was wondering 1) if the forge in the pic is made out of a BBQ propane tank ? and 2) what size blower did you end up going with? I am in the process of making a forge out of a large propane tank and i'm trying to figure out how large of a blower to use ..

Thank you Glendon
 
Glendon J. Woodside said:
I know this is a really old post but I was wondering 1) if the forge in the pic is made out of a BBQ propane tank ? and 2) what size blower did you end up going with? I am in the process of making a forge out of a large propane tank and i'm trying to figure out how large of a blower to use ..

Thank you Glendon
Click to expand...

Hey Glendon,

Sorry it took me 6 years to get back to you....

1.) Yes it was made from a BBQ propane tank
2.) It's a 164CMF Hyesung Blower (Just plugged it in, still works. Haven't forged in a while... getting back into the game)

Here are some pics from the forge running around 2012. It ran up until I went to college... then it sat for ~5 years before my parents sold it. I was able to forge weld can damasucs with that forge (filled with HD roller bearings and the like). It was based on Indian George's design.

Note that the bricks made the best door for it...

over view by JK2900, on Flickr

New SHop 005 by JK2900, on Flickr

canbillet 020 by JK2900, on Flickr
 
For those who are interested here is a link that discusses the different types of blades in a squirrel cage blower.
https://www.cincinnatifan.com/blower-wheels.htm
The thing you need to note is there are those that create a high static pressure (they don't stall at low flow rates) and those that create high airflow (and tend to stall at restricted airflow).

There are two points I'm trying to make: One is that a correct sized blower (not overly large) won't need to have heavy restrictions placed on it's airflow causing it to stall, the second is by adding a cross paddle to an existing airfoil (creating a hybred) type cage you can greatly improve it's restricted airflow pressure.
Jim
 
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