Choosing Your First Forge: Gas, Coal, or Two Bricks

Every forged blade starts with the same purchase decision, and the good news is it’s gotten cheap: a genuinely usable knifemaking forge now costs less than a good set of chisels. This guide covers the real options — propane, coal, and the honorable two-brick DIY — and the handful of specs that actually matter for blades.

Gas Is the Beginner Answer (Coal Is the Romance Answer)

Propane wins for almost every new knifemaker: instant on/off, no fuel sourcing, no smoke (your neighbors care), consistent heat, suburban-garage friendly. Coal/charcoal burns hotter at the center and is gloriously traditional, but it demands fire management skills, a fuel supply, and tolerance from everyone downwind — it makes sense as a second forge for smiths who fall in love with the craft’s history, not as a first tool. Everything below assumes gas.

Inside a Gas Forge

• Aregulator + propane
• Bburner enters at an angle for a swirling flame
• Csteel shell
• Dwork opening (front door)
• Eyour steel at the sweet spot - not touching the floor
• Finsulating liner (ceramic wool coated/rigidized, or firebrick)

Venturi burners (no blower) are simple and quiet; blown burners (with fan) throttle lower and weld easier.

Chamber size matters: small chambers heat fast and sip propane - big chambers cost gas all day.

The Specs That Matter

• Chamber size — smaller than you think. A knife needs 4–6″ of steel hot at a time (you forge in sections). Small chambers reach temperature in minutes and sip propane; a big two-burner box costs gas all day heating air you’re not using. Buy for the blades you’ll actually make.

  

• Venturi vs. blown burners. Venturi burners (no moving parts, gas flow pulls in air) are simple, quiet, and plenty for forging heat. Blown burners (electric fan) throttle lower without sputtering, hit welding heat easier, and give finer control — at the cost of needing power and a bit more setup. For a first forge doing general blade work, venturi is fine; if forge-welding damascus is the goal, a blown burner (or a well-matched venturi in a small, tight chamber) earns its keep.

  

• Liner type. Ceramic wool linings (coated/rigidized) heat fastest; hard firebrick (like the mullite bricks Atlas uses) takes more abuse and lasts longer against flux and bumps. Important: raw ceramic wool sheds respirable fibers — it should always be rigidized or coated, never left bare.

  

• Welding heat, if damascus calls. Not every forge reaches ~2,300°F. If pattern welding is anywhere in your plans, check that the model demonstrably welds — or you’ll be shopping twice.

Real Options, Verified

• Mr. Volcano Hero (~$100) — the budget standard-bearer; stainless shell, hits 2,600°F-class temperatures, and the Hero 2’s dual burners heat fast and evenly. Astonishing capability for the money and the common answer to “cheapest forge that actually works.”
• Atlas Knife & Tool forges — built around tough 2,500°F-rated mullite firebrick instead of wool; ready out of the box, frugal on propane, and popular across skill levels. Atlas also sells the burner alone for the DIY route below.
• NC Tool Whisper series — the long-running quality venturi option (the Whisper Baby especially), known for quiet operation and longevity; a buy-once choice seen in working shops everywhere.
• The two-brick forge (DIY, well under $100) — two soft firebricks hollowed and paired with a real burner (Atlas’s burner kit is the classic pairing). Small, fast, shockingly capable for knives — a legitimate first forge, not a toy, and the natural upgrade from the torch setups in our no-kiln heat treating guide.

  

Budget Reality Check

Forge $100–350, anvil-and-hammer setup $50–300 with scrounging skills, steel a few dollars a bar (sourcing guide) — forging’s cost of entry is genuinely lower than stock removal’s grinder-shaped price tag, which is worth knowing when budgeting the whole craft (see what knifemaking costs). The grinder still earns its place later: even forged blades get their final geometry and finish on a belt (why both paths converge).

Sources

• I Forge Iron — venturi vs. blown burner discussion
• Forging World — gas forge comparisons (Mr. Volcano Hero)
• Atlas Knife & Tool — two-brick forge build
• BladeForums — forge burner threads