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Evenheat Knife Oven - KO 27

SKU EH-KO-27
Save $731.01
Original Price $3,655.00
Current Price $2,923.99
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Not sure this is the right fit? Power, size, firing needs: talk it through with a real person before you order. Call or text (470) 264-3563

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Flat-Rate Freight Delivery
✓ No sales tax outside GA ✓ Quoted at checkout ✓ Authorized dealer
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Made to Order: EvenHeat kilns are built after ordering. Current estimate is 4–6 weeks. We confirm all details after your order is placed.
  1. 1 We submit your kiln order for production with the manufacturer.
  2. 2 We confirm the current estimated lead time and keep you updated.
  3. 3 Your kiln is built to your specifications and prepared for freight shipment.
  4. 4 We send tracking and delivery instructions once your kiln ships.
Evenheat  ·  Heat Treating Oven  ·  KO Series Evenheat Knife Oven - KO 27 Model EH-KO-27 · 240V · 9"W × 5.5"H × 27"D · 2350°F Max The KO 27 is Evenheat's deepest heat treating oven, purpose-built for bladesmiths working with long, heavy blades and high-mass loads. With 3-inch firebrick insulation, special high-temperature alloy elements, and a side-opening door that keeps scorching heat away from you during quenching, this is the serious knifemaker's choice for precise, repeatable heat treatment up to 2350°F.
Max Temp2350°F
Chamber9" × 5.5" × 27"
Voltage240V
Brick Thickness3 inches
Optional accessories
Stainless Steel Work RacksCustom-sized racks for supporting multiple blades during heat treatment. Built from high-temp stainless for durability and easy cleaning.
Spare ThermocoupleType K thermocouple as backup for your primary temperature sensor. Critical for uninterrupted heat treating schedules.
Brick Repair KitHigh-temperature mortar and patching compound for maintaining firebrick integrity over years of service.
Element Replacement SetFull set of special high-temperature alloy elements designed specifically for the KO Series heat treating ovens.
Protective Heat GlovesHeavy-duty gloves rated for high-temperature blade handling during transfers from oven to quench tank.
Digital Timer with AlarmStandalone timing solution with audible alerts for multi-stage heat treating processes and precise soak times.
Controller upgrades
TAP Touchscreen — SDS IndustriesTop Tier
For bladesmiths running complex heat treating cycles with precise soak times and controlled cooling rates, TAP delivers lab-grade control with modern connectivity. Monitor critical austenitizing temperatures from your phone and get alerts when it's time to quench—no more standing by the oven for 20-minute soaks.
  • Unlimited programs and firing steps
  • TAP mobile app — monitor from your phone
  • Push notifications when firing completes
  • Adjust temp or add time mid-firing
  • Auto-updates over Wi-Fi
  • Firing logs and maintenance schedules
Genesis Spark — Bartlett InstrumentsGreat Value
The Genesis Spark delivers professional-grade heat treating control at a mid-range price point, with plenty of program memory for your steel library and ramp/hold precision for consistent results. Touchscreen programming is faster than traditional button controllers, and Wi-Fi connectivity ensures your firmware stays current.
  • 30 programs × 32 segments each
  • 3.2″ color touchscreen display
  • Wi-Fi for remote updates and diagnostics
  • Cone fire and ramp/hold modes
  • Preheat capability built in
  • Adjust firing in real time
Common questions
Will this oven handle the steels I'm working with?At 2350°F maximum, the KO 27 exceeds the austenitizing temperature of every common blade steel—including high-alloy steels like CPM-154, S30V, and even demanding stainless grades like 440C. You'll have headroom above your target temperature for faster recovery when the door opens.
Why is the 27-inch depth important?The 27-inch chamber depth is designed for long blades—swords, machetes, large bowies, and chef knives up to about 24 inches. If you're working with shorter blades (under 18 inches), consider the KO 18. The deep chamber also accommodates multiple shorter blades staged vertically on racks for batch heat treating.
What's the advantage of the side-opening door?Heat treating requires fast blade removal for quenching. A drop-down door puts a 2000°F+ surface directly in your path, radiating intense heat at your hands, arms, and face. The side-opening door swings completely out of your way—up to 180°—keeping that radiant heat away from you while you focus on safely transferring the blade to the quench tank.
Do I need a special electrical circuit for this oven?Yes. The KO 27 requires a dedicated 240V circuit. It draws 15 amps and comes with a NEMA 6-20 plug, so a 20-amp circuit with a NEMA 6-20 receptacle is typical. This is standard for heat treating equipment of this capacity. You'll need a licensed electrician to install the appropriate breaker and receptacle—budget $300–$800 depending on distance from your electrical panel and local rates.
Does buying from Peach State Pottery affect my warranty?No. We are an authorized Evenheat dealer. Your two-year warranty is fully valid and you have direct access to Evenheat’s support team. Buying from an unauthorized seller can void your warranty entirely.
Not sure if the EH-KO-27 is right for you? We’re authorized Evenheat dealers based in Atlanta. Call, email, or chat — we’ll give you a straight answer about specs, sizing, and accessories before you spend a dollar.
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Common questions about this kiln

Still stuck? Call or text (470) 264-3563 and talk it through with a real person.

Is freight delivery included in the price?

No. Kiln prices do not include freight, and we do not quietly build it into the product price. Freight is charged at a flat rate based on your delivery address and is shown at checkout. Liftgate service is included when it is needed, and standard delivery is curbside. You can estimate your delivered cost with the ZIP code tool above the Add to Cart button.

Can I return this kiln if it is not right?

Return requests can be submitted within 30 days of delivery. The kiln needs to be in its original packaging, in new and resellable condition, and approved before it is sent back. A restocking fee may apply. Completing the manufacturer's recommended first test firing does not by itself make a kiln non-returnable, so you can confirm it works before you commit. Full terms are on our Returns page.

What electrical supply do I need for this kiln?

The Specifications tab on this page lists this model's voltage, amperage, required breaker size and NEMA plug configuration. Most 240V kilns need their own dedicated circuit fitted by a licensed electrician, while many 120V models run from a standard household outlet. If you are unsure what your space can support, call or text (470) 264-3563 before ordering.

Does this kiln come with a warranty?

Yes. This kiln carries the Evenheat manufacturer warranty. Coverage length, what is included and any registration deadline are listed in the Specifications tab on this page. We are an authorized Evenheat dealer, which is a condition of warranty coverage on most kiln brands.

What comes with the kiln, and what do I need to buy separately?

The What's Included tab on this page lists exactly what ships with this kiln. Most kilns need shelves, posts and kiln wash before your first firing, and these are not always included. A vent is recommended for indoor installations. Any add-ons available for this model are shown above the Add to Cart button.

About this kiln
Best for: Glass artists, ceramic hobbyists, knife makers, and specialty craftspeople who need a precision American-made kiln with accurate temperature control and a compact, studio-friendly footprint.
🔨 Lead time
4–6 weeks
Made to order — built to your specifications. We confirm the current estimate after your order is placed.
✓ Warranty
Manufacturer warranty
Full coverage included. We are here if anything goes wrong after your order.
Why buy from Peach State Pottery?
★ Authorized EvenHeat Dealer
★ No sales tax outside Georgia
★ Flat-rate freight delivery
★ Real support before & after order
★ Military discount for veterans
★ We are here if anything goes wrong
Call or text us:✆ (470) 264-3563
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EvenHeat production slots fill fast
Placing your order now locks in your position in the build queue and secures today’s pricing. Lead times can shift during high-demand periods.