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Evenheat Knife Oven - KO 18

SKU EH-KO-18
Save $650.01
Original Price $3,250.00
Current Price $2,599.99
Talk to an Expert Secure Checkout 30-Day Returns No Sales Tax Outside GA

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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 18 Model EH-KO-18 · 240V · 18" depth chamber · 2350°F max The KO 18 is the most popular heat treating oven in the KO Series, engineered specifically for knife makers and machinists who need precise, repeatable hardening cycles. Built with 3" firebrick insulation and special high-temperature element alloy, it reaches 2350°F with faster heat-up times and tighter temperature control than standard ovens. The side-opening door design keeps the super-heated door away from you during critical quenching operations.
Max Temp2350°F
Chamber18" depth
Voltage240V
Brick3" firebrick
Optional accessories
Power Interrupt SwitchOptional switch that cuts power to the heating elements whenever the door is opened.
Additional ShelvesExtra firebrick shelves for stacking multiple blades or parts during heat treating cycles.
Shelf SupportsHigh-temperature supports and posts for custom shelf configurations inside the chamber.
Stainless Steel TongsHeat-resistant tongs designed for safely handling blades and parts during quenching operations.
Chamber Repair KitReplacement firebrick and patching materials for maintaining your oven over years of use.
Replacement ElementsSpare high-temperature element wire sets to minimize downtime during routine maintenance.
Controller upgrades
TAP Touchscreen — SDS IndustriesTop Tier
For knife makers running complex hardening and tempering cycles, TAP delivers unlimited program storage and real-time mobile monitoring so you can manage multi-stage heat treating schedules with confidence. Monitor austenitizing temps from anywhere in the shop and get alerts when it's time to quench.
  • 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 offers professional-grade control at a mid-range price, perfect for blade smiths who need reliable ramp-and-hold programming without the cost of the TAP system. Touchscreen operation and Wi-Fi diagnostics deliver modern convenience with proven Bartlett reliability.
  • 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
What steels can I heat treat in the KO 18 at 2350°F?At 2350°F maximum, the KO 18 handles virtually every blade steel including high-carbon steels (1095, 1084, O1), stainless steels (440C, AEB-L, 154CM), and even high-alloy tool steels and powdered metallurgy steels. This temperature range covers austenitizing requirements for all common knife making alloys and most exotic alloys.
Why is the side-opening door better than a drop-down door?During quenching, you need to quickly remove super-heated blades from the chamber. A drop-down door stays directly in front of you, radiating intense heat at your hands and face. The side-opening door swings a full 180° away, keeping that radiant heat well to the side while you focus on safely grabbing and quenching your work. The front-mounted cool-touch handle is also easier to operate one-handed while holding tongs.
How does the 3" firebrick improve performance?The extra half-inch of insulation compared to standard 2.5" brick reduces heat loss, which translates to faster heat-up times, more stable holding temperatures, and lower energy costs per cycle. For heat treating where precise temperature control is critical, this improved insulation helps the controller maintain tighter tolerances, especially during long soak times at austenitizing temperatures.
Does the KO 18 include the Quiet Drive Solid State Relay?Yes, it's standard on all KO ovens. The Quiet Drive SSR fires 60 times per second with no moving parts, delivering much tighter temperature control than mechanical contactors. This means less temperature swing during critical soak phases, more repeatable results across batches, and quieter operation. For professional knife makers or anyone doing production heat treating, that's a real advantage.
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-18 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.