KO 27" High Temp Oven for Sword-Length Blades and Advanced Steels
The Evenheat KO 27 Heat Treat Oven is part of Evenheat’s higher-temperature KO series, engineered specifically for stainless and high-alloy steels that demand hotter soak temps. With its 27″ chamber depth, it’s ideal for sword-length blades, large chef knives, cleavers, and batches of mid-length knives—all with precise, repeatable heat treating.
This oven fires up to 2350°F, giving you the temperature range needed for stainless, carbon, and tool steels. Digital controls allow you to program exact heating, soaking, and cooling steps, ensuring repeatable hardness and consistent results every time.
Built with thick firebrick and engineered for even heat, the KO 27 maintains stability throughout its extended chamber. A swing-view control panel, relay access port, and cool-touch handle make operation safe and straightforward. Whether you’re pushing the limits with long blades or treating heavy shop tools, this kiln delivers reliable results you can trust.
Key Features of the Evenheat KO 27 Heat Treating Kiln
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High-Temp KO Series: Optimized for stainless and high-alloy steels, while also handling carbon and tool steels.
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27″ Deep Chamber, 0.77 Cubic Ft: Designed for swords, cleavers, and large chef knives.
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Full Firebrick Construction: Provides excellent insulation and steady heat cycles.
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Fires to 2350°F (1288°C): Handles high-temp cycles for stainless and tool steels.
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Programmable Controls: Simple, accurate programming for heating, soaking, and cooling.
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Quiet Drive Solid State Relay (Now Standard): Silent and reliable temperature control that protects elements.
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Swing View Panel: Tilting control panel for clear visibility and easy use.
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Built to Fire Often: Rugged build for daily shop or studio use.
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Relay Access Port: Quick relay service without dismantling the control box for easy maintenance.
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Cool-Touch Handle & Door Shield: Protects your hands and firebrick while opening and closing.
Additional Options for the KO 27 Knife Oven
🗡 MK1 Blade Fixture
Sized at 5.25″ × 5.25″, this fixture provides ample space for foil wrap inflation while staying rock-solid and stable. It won’t get in the way and never tips over.
🗡 MK2 Blade Fixture
Sized at 7¼″ × 7¼″, this fixture offers generous foil inflation space while remaining solid and stable. It stays clear of your work and won’t tip over during use.
🔊 Loud Alarm Kit
Amplifies your control alarm to 80 dB, loud enough to cut through noisy shop environments so you never miss a quench. Installs quickly on TAP or Rampmaster panels.
🛢 Quench Tank
Constructed from heavy-duty welded steel with bolt-on feet, this tank measures 24″ deep × 26″ tall and holds 3 gallons. It features 6″ square steel tubing (0.120″ wall), a 5.75″ square opening, a ⅛″ steel lid, and strong welded handles for lasting reliability.
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 KO 27 High Temp Oven Specifications
| Feature |
Specification |
| Model |
Evenheat KO 27 |
| Function |
Knife and tool heat treating – stainless, carbon, and specialty steels |
| Interior Dimensions (D × W × H) |
27″ x 9″ x 5.5″ |
| Chamber Volume |
0.77 cu ft / 68.6cm D x 22.9cm W x 14.0cm H / 21.8L |
| Maximum Temperature |
2350°F (1288°C) |
| Voltage |
240V standard (200V, 208V, 220V, 230V by request) |
| Amperage |
15A |
| Wattage |
3600W |
| Receptacle Required |
NEMA 6-20 |
| Breaker Required |
20A |
| Weight |
~ 126 lbs (freight) |
| Line Frequency |
50Hz or 60Hz |
| Outside Dimensions (D × W × H) |
34.5″ × 20″ × 19.5″ |
| Controller Options |
TAP II Smart, Icon, Icon+, Rampmaster 3 |
| Shipping |
Freight truck |
Evenheat KO 27 Manual
Evenheat KO 27 Manual
