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  #11  
Old 10-12-2016, 07:03 AM
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The Hmong hilltribe guys used more of a Japanese/Chinese style box blower with their clay mud forges.
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  #12  
Old 10-12-2016, 09:36 AM
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This guy has a couple side-blast forges. You can see details of his smaller portable forge starting at 14:43. He has a couple more videos.

Blacksmithing - Why Side Blast Forges Are The Best #1

https://www.youtube.com/watch?v=ypahcig1KQw
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Old 10-12-2016, 04:44 PM
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Quote:
Originally Posted by USMCPOP View Post
This guy has a couple side-blast forges. You can see details of his smaller portable forge starting at 14:43. He has a couple more videos.

Blacksmithing - Why Side Blast Forges Are The Best #1

https://www.youtube.com/watch?v=ypahcig1KQw
That was a good over view...

His take on a soft coal forge is a little off but I think it's because of his skill level with it.. A soft coal forge certainly does take more work then any other fuel except maybe a wood forge.
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  #14  
Old 10-12-2016, 05:35 PM
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Thanks a lot Allessence for your informative replies.

I did have a bottom blast forge but was never really taken
with it, found it slow to heat.
The next one I build will be a water cooled side blast.

Do you have any dimensions re a side blast.
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Old 10-12-2016, 06:14 PM
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Quote:
Originally Posted by R W View Post
Thanks a lot Allessence for your informative replies.

I did have a bottom blast forge but was never really taken
with it, found it slow to heat.
The next one I build will be a water cooled side blast.

Do you have any dimensions re a side blast.
Your welcome..

slow to heat??????? Maybe I can help you with the problem.. Soft coal forges have one of the fastest reheat times.

From a cold start i can have the forge, forge welding ready in 5 minutes????

Takes me only 2 minutes to start it from a dead cold.. and in those 2 minutes the fire is ready really at 1minute 30seconds..

A bottom blast forge if setup wrongly either fuel wise or how it's fed can be a major problem..

Recently when I was at the NEB show everyone there ran there forges with hollow firepots.. It was as if they were never taught how to use the firepot and it's different heat zones or the fact tht different parts of the fire offer different zones in regards just like a gas torch.. Oxidizing, neutral, or carbonizing depending on how the fire is made and where the piece of metal is located..

Not sure if you know how to forge weld or not but this can be seen when forge welding.. If you stick the rod way down at the bottom the piece will throw sparks before it hits welding temperature.. If at the neutral part of the fire it will go past welding heat almost to white and never throw sparks until it gets removed from the fire..

And carbonizing you will reach welding temperature but it will take longer and the metal won't look quite right..

Anyhow, ask some questions in regards to the forge you have and send some pictures..

Hand blower or electric.. What kind of coal? What kind of forge? How big is the firepot? How deep is the firepot? (most people try to convince others that the firepot should be small).. for me it's a 12X14" with 4-5" deep..5 or even 6 is ideal..

Do you have a factory made forge or a self made one?

The video Pops posted while the guy had some good suggestions he wasn't totally accurate with the coke info nor his take on soft coal as a fuel..

I pull almost no clinker out even after a day of forge welding for 4-6 hrs.. Forge welding creates the largest amount of clinker not only because of all the flux and scale that goes in but also because it has the highest consistent heat and this makes the impurities stick together..

One big disadvantage to the side draft is no clinker breaker and the air hole can actually get plugged up if you use a hand crank blower..
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  #16  
Old 10-12-2016, 06:24 PM
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Quote:
Originally Posted by USMCPOP View Post
The Hmong hilltribe guys used more of a Japanese/Chinese style box blower with their clay mud forges.
..
Pops so true.. I consider all these designs as Asian forges.. Basically a tunnel affair with a side pipe coming in.. sometimes more than 1 pipe with or without box blower..

These forges are designed to keep the fire contained within walls and this controls how large a fire gets in area (widthXlength) vs a side blast or bottom blast forge which can take a little bit of skill to keep the fire where it belongs..

some days the fire doesn't want to behave at all and it can take a good 2 or 3 hrs to get the fire under control.. Somedays it's all magic..


I have heated to an orange color anvils as big as 200lbs in my old masonry forge which I built when I was 17..

It had a bottom blast assembly with a standard 12X14" Centaur firepot..

Great pics each post.. Thanks
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Jennifer

If I defend myself I am attacked.

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My attack thoughts are attacking my invulnerability.

I'd like to think of something smart, but I don't want to hurt myself.

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DoALL 36"
Another Johnson model J Project
Lathe? Maybe..... 1958 SBL 13"
Yeti Esseti Aka running welder on 3phase.
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  #17  
Old 10-13-2016, 06:04 AM
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Re Post #15.
At this time I do not posses a forge, did have a homemade
bottom blast which was made from a plough disc and a car rim, a hand
cranked blower was used.
I believe the cause of the slow heating may have been due to the
lack of good quality fuel, tried coal from a local mine but found the ash
content to be high. Other fuel such as coke or charcoal are not easy to
obtain here. Have heard coal from another mine about 2 hours away
may be OK.
I have a blower at the moment that was not sold as a forge blower
but I'm sure it can be adapted and easily set up for hand or electric
motor drive.
I have not tried forge welding.

Last edited by R W; 10-13-2016 at 06:09 AM.
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  #18  
Old 10-13-2016, 06:12 AM
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In the video I posted, the guy does give some dimensions for the smaller forge.
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  #19  
Old 10-15-2016, 09:28 AM
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here is a complete PDF on making a setup.. Mark Aspery uses a side blast forge..

I've grown over the years to prefer a bottom blast because of how you can set it up with a hoodless stack.. Really it's the hoodless stack I prefer..

A side blast needs to have a proper chimney..
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Jennifer

If I defend myself I am attacked.

My meaningless thoughts are showing me a meaningless world.

My attack thoughts are attacking my invulnerability.

I'd like to think of something smart, but I don't want to hurt myself.

My google+ page

DoALL 36"
Another Johnson model J Project
Lathe? Maybe..... 1958 SBL 13"
Yeti Esseti Aka running welder on 3phase.
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  #20  
Old 10-16-2016, 03:41 AM
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Thanks Allessence for the PDF
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