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First propane forge build


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Posted (edited)

First off.. glad to be here with my first post!!  Been thinking about recreational/hobby bladesmithing small ~8 inch total length, (eventually want to be able to forge weld and Damascus pattern weld) knives for the past couple months and have done a lot of reading and watching videos. Still many questions. I am very limited to the tools i own and they are mostly for woodworking.
 

 I’m having a hard time finding builds for FORCED air propane burners/forges. There’s a ton .. A TON of stuff about Venturi burners and the frosty t.. but knowing that my ultimate goal is pattern welding small knives.. I’m thinking it would just be better to have control of the air/gas environment.. and forced air sounds like the way to go. Can anyone point me or give some tips/info, on where to start with this? 

 

1. where do you get supplies from online? Things like steel, tongs, hammers etc.. Where do you buy from?

 

2. What type/strength blower would i need for a single burner knife making forge .. certainly less than 350ci 

 

3. Does anyone know of any vids, plans etc for making a forced air forge? 
 

4. How do i protect the bottom from flux? Kitty litter (clay?), hard firebrick?, kiln shelf? 


Yeah this was a lot .. but any help would be appreciated. 

Edited by Nicholai
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  • Nicholai changed the title to First propane forge build

Welcome aboard!

 

Here's the burner instructions.  For flux resistance, a kiln shelf works, but a castable refractory like kast-o-lite 30 is better.  Your other question, steel and such, is mostly personal preference and location.

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Posted (edited)

Ahh… it was stickied and i missed it!!!!  There’s a lot to take in. A whole new world in here. Thank you!! I’ll check that link out right now.  yeah the online suppliers are personal preference.. i was curious as to what others used.. the only one that I’m really finding is blacksmithsepot

Edited by Nicholai
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1 hour ago, Alan Longmire said:

Welcome aboard!

 

Here's the burner instructions.  For flux resistance, a kiln shelf works, but a castable refractory like kast-o-lite 30 is better.  Your other question, steel and such, is mostly personal preference and location.

 Is kast o lite flux proof?.. or does it just have a higher resistance

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I have a little more time now, so here's a more detailed reply:

 

The castables, both kast-o-lite and Mizzou, are pretty much flux proof.  Some people even cast thin sacrificial trays out of it and toss them when the flux puddle gets too big.

 

Blacksmithsdepot, pieh tool https://www.piehtoolco.com/, Centaur Forge https://www.centaurforge.com/default.asp, Blacksmithsupply https://www.blacksmithsupply.com/, Big Blu https://bigbluhammer.com/ and more are fine for hammers and tongs and such.  

 

For steel I usually use Aldo at https://newjerseysteelbaron.com/, he's one of us and knows what we want, but if you're west of the Rockies shipping can get pretty steep.  Sometimes https://usaknifemaker.com/ if Aldo's out of stock.  Sometimes MSCdirect if I want W1 or O1 drill rod.  

 

For sandpaper, rynowet redline from https://www.supergrit.com/ or https://trugrit.com/, depending on what's in stock and who's cheaper.  I go to those guys for belts as well, but if you're just starting out you won't need those for a while, unless you jump in hard and buy or build a grinder.  

 

For files, those are getting harder to find in usable form.  MSCdirect has the best selection, but sometimes eBay and Amazon will surprise you.

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It's worth mentioning that "Kast-O-Lite" is a trade-name used for a series of Insulating Castables with a range of temperature ratings. Usually Kast-O-Lite is followed by a number, which denotes the rated temperature in hundreds of degF. For welding forges, Kast-O-Lite 30 (3000 degF) is the stuff to use. Also seen as Kast-O-Lite 30 LI, the LI stands for Low Iron: this may not matter much to "us", but there are some applications where the LI is important.

 

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Thanks for the detailed reply Alan!.. yup I’m on the east coast too. I’ll be checking out those links though! The grinder will have to wait lol… i have a small one and it’s just gonna have to do for now. 

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