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Evenheat Knife Oven - KF 49.5 Extreme

SKU EH-KF-49.5
$5,236.00
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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 · Knife Oven · KF Extreme Series Evenheat Knife Oven - KF 49.5 Extreme Model EH-KF-49.5 · 240V · 49.5″ deep chamber · 2200°F max The KF 49.5 Extreme is Evenheat's deep-chamber knife oven, built for bladesmiths working swords, Damascus billets, and long fixed blades that won't fit a standard-depth heat treating oven. A 49.5″ firebrick chamber with dual end doors and side-only heating elements gives you full-length, even heat treating without sacrificing element life.
Max Temp2200°F (1205°C)
Chamber49.5″ D × 10″ W × 6.25″ H
Voltage240V, 30A
Shipping Weight~200 lbs
Key features
Dual-Door AccessEnd doors at both ends of the deep chamber let you load and unload long blades and billets from either side without repositioning the piece.
Side-Only Heating ElementsElements are mounted on the side walls rather than in the floor, so blades resting on the hearth aren't sitting directly against a heat source — better element life and more even heat treating.
Full Firebrick Chamber ConstructionThe entire 49.5″ chamber is built from heat-treat-rated firebrick for consistent temperature along the full length of the blade.
Quiet Drive Solid State RelayStandard on every KF Extreme model. Zero moving parts and up to 60 firings per second for tight temperature control on long soaks.
Cool-Touch HandlesSpring-loaded phenolic handles on both doors stay cool to the touch, even after a long hardening cycle.
Reinforced Stand with Tool RestHeavy-duty stand sized for the extended chamber, with an integrated rest for tongs and quenching tools within arm's reach.
Optional accessories
Loud Alarm (80dB)Wired alarm output lets you hear cycle-complete or over-temp alerts from across a noisy shop.
Additional Kiln ShelvesExtra hearth shelves let you stage multiple blades or fixtures at once inside the deep chamber.
Spare Type K ThermocoupleA backup probe means a worn thermocouple never turns into a stalled production run.
High-Temperature Gloves & TongsFull-length gloves and long tongs sized for reaching the far end of a deep KF chamber safely.
Controller upgrades
TAP Touchscreen — SDS IndustriesTop Tier
For shops running long, multi-stage cycles on swords and Damascus billets, TAP gives the KF 49.5 unlimited custom programs and remote monitoring so you can track a long soak from your phone instead of standing at the oven.
  • Unlimited programs and firing steps
  • TAP mobile app — monitor from your phone
  • Push notifications when firing completes
  • Adjust temp or add time mid-cycle
  • Auto-updates over Wi-Fi
  • Firing logs and maintenance schedules
Genesis Spark — Bartlett InstrumentsGreat Value
The Genesis Spark puts professional ramp/hold control on the KF 49.5 with a color touchscreen and 30 stored programs — solid coverage for repeat blade steels without TAP's premium price.
  • 30 programs × 32 segments each
  • 3.2″ color touchscreen display
  • Wi-Fi for remote updates and diagnostics
  • Ramp/hold and preset modes
  • Preheat capability built in
  • Adjust firing in real time
Common questions
What kind of circuit does the KF 49.5 need?It's a 240V, 30-amp appliance with a NEMA 6-50 plug — the same class of circuit as a home welder outlet. Have a licensed electrician confirm your panel capacity and run a dedicated line before you fire it; this is not a plug-and-play 120V oven.
Why does the KF Extreme have two doors instead of one?The deep chamber is built to hold full-length swords and long fixed blades. Dual end doors mean you can load a long piece from whichever side is convenient in your shop layout, and unload for quenching without walking the blade all the way back through a single opening.
What blade or billet lengths fit the KF 49.5?The usable chamber is 49.5″ deep, 10″ wide, and 6.25″ tall. As a rule of thumb, plan for blade or billet length a few inches shorter than the chamber depth to leave clearance at both doors — contact us with your exact dimensions and we'll confirm fitment before you order.
How do I know if I need this size versus a different KF Extreme?The KF Extreme line runs from 31.5″ up to 49.5″ of usable depth in roughly 4.5″ steps. Choose based on the longest single piece you regularly harden — going one size larger than your longest current blade gives you room to grow into swords or longer Damascus billets later.
Does buying from Peach State Pottery affect my warranty?No. We are an authorized Evenheat dealer, so 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-KF-49.5 is right for your shop? 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.