KF Extreme 31.5 Heat-Treating Kiln with Deep Chamber for Long Blades
The Evenheat KF Extreme 31.5 Knife Kiln gives you the chamber length needed to heat treat large blades, tools, and specialty steels with accuracy and ease. With a full 31.5" depth, you can fit long chef knives, swords, or multiple smaller blades in a single run, making it well-suited for both hobbyists and professional makers.
This kiln fires up to 2200°F, so whether you’re working stainless, carbon steel, or specialty alloys, you’ll reach the exact temperatures your recipes call for. The single-phase design paired with advanced digital controls means you can set your heat cycles with confidence and focus more on your craft, not on managing temperature swings.
Built with firebrick insulation and heavy-duty construction, the KF Extreme 31.5 holds heat evenly across the chamber. That means smoother results, consistent hardness, and less stress when you pull your blades from the quench. If your work involves long, complex projects or regular runs of smaller knives, this kiln makes the process faster, more reliable, and more enjoyable.
Key Features of the Evenheat KF 31.5 Knife Kiln
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Best for Knife Makers: Handles stainless, carbon, and specialty steels, including long blades and shop tools.
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31.5″ Deep Chamber, 1.18 Cubic Ft: Handles swords, chef knives, and multi-blade batches with ease.
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Full Firebrick Construction: Provides strong heat retention for consistent soak and hardness results.
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Fires to 2200°F (1205°C): Suitable for stainless steels, tool steels, and high-temp cycles.
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Programmable Controls: Accurate programming for heating, soaking, and controlled cool-down.
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Quiet Drive Solid State Relay (Now Standard): Silent, reliable temperature control that extends element life.
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Swing View Panel: Angled control panel makes programming comfortable and clear.
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Relay Access Port: Quick and easy access when service or relay replacement is needed.
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Dual Side-Opening Doors with Stainless Shields: Protect firebrick and reduce heat at the handles for safer operation..
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Loud Alarm Output Jack: Connect an external alarm so you never miss a quench, even in noisy environments.
Additional Options for the KF 31.5 Heat Treating Oven
🗡 MK2 Blade Fixture
Measuring 7¼″ × 7¼″, this blade kit gives you plenty of room for foil inflation and stays completely stable during use. It won’t get in your way, and you never have to worry about it tipping over.
🔊 Loud Alarm Kit
Raise your control alarm to 80 dB, loud enough to cut through busy shop noise, so you never miss a quench. Designed for quick, easy installation on TAP or Rampmaster panels.
🛢 Quench Tank
Built with heavy-duty welded construction and bolt-on feet, this tank measures 24″ deep × 26″ tall. It holds 3 gallons and includes 6″ square steel tubing (0.120″ wall), a 5.75″ square opening, a ⅛″ steel lid, and sturdy welded handles for reliable use.
Who We Are
Modern Potters is women-owned and operated. We're all about hard work, continuous learning, and celebrating creativity in all forms. And like you, we LOVE bringing ideas to life.
We're Potters Ourselves! Starting with clay taught us that great work happens at high temperatures, so whether you're working with ceramics, glass art, metalworking, or industrial applications like DPF cleaning, we're here for you.
P.S. The cute pup's name is Kodah, he's the CPO (Chief-Pottery-Officer). He's the one who threw the bowl in the photo, if you can believe it. ✨
Evenheat KF Extreme 31.5 Heat Treat Oven Specifications
| Feature |
Specification |
| Model |
Evenheat KF Extreme 31.5 |
| Function |
Knife heat treating – stainless, carbon, and specialty steels |
| Interior Dimensions (D × W × H) |
31.5″ x 10″ x 6.25″ |
| Chamber Volume |
1.18 cu ft / 80cm D x 25.4cm W x 16.5cm H / 33.4L |
| Maximum Temperature |
2200°F (1205°C) |
| Voltage |
240V standard (200V, 208V, 220V, 230V by request) |
| Amperage |
30A |
| Wattage |
7200W |
| Receptacle Required |
NEMA 6-50 |
| Breaker Required |
50A |
| Weight |
~ 150 lbs (freight) |
| Line Frequency |
50Hz or 60Hz |
| Outside Dimensions (D × W × H) |
37″ x 20″ x 19.5″ |
| Controller Options |
TAP II Smart, Icon, Icon+, Rampmaster 3 |
| Shipping |
Freight truck |
Evenheat KF Extreme 31.5 Manual
Evenheat KF Extreme 31.5 Manual
