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Evenheat Knife Oven - KO 18 - front view

Evenheat Knife Oven - KO 18

EvenheatHeat Treating OvenSKU EH-KO-18
$2,729.99$3,250.00
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Not included: blade fixture, loud alarm, tongs, gloves and foil (sold separately). Requires a 240V single-phase circuit (13A, 3120W) with a NEMA 6-20 receptacle.

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Evenheat Knife Oven - KO 18
$2,729.99
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Overview

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
What’s included
The oven, assembledIt arrives built and wired, with the elements already in place. Set it on its stand, plug it in and fire.
Stand with tool restA welded stand, included, with a tool rest built into it so you have somewhere to set hot work the moment it leaves the chamber.
Digital controller, fittedOne controller, installed in the oven’s own enclosure at the factory. You pick Icon, TAP II or RampMaster 3. Only one ships per oven.
Thermocouple, installedAlready mounted in the chamber and wired to the control. Evenheat fits special limits thermocouples for close temperature reading.
Attached power cord and plugThe cord is fitted at the factory with a moulded plug. This build lands on a NEMA 6-20 outlet — have one in place before the oven arrives.
Two-year Evenheat warrantyTwo full years on workmanship and materials, honored by Evenheat Kiln Inc. Tell us within 10 days of finding a fault and we file it for you. Kiln furniture is not covered.
Loud alarm unit not includedThe output jack for the loud alarm is fitted, but the alarm itself is an accessory. Say the word and we will put one in the crate.
Power interrupt switch not includedOn this model the power interrupt switch is a build option rather than standard equipment. Ask us to add it when you place the order.
Key features
Side-Opening DoorFull 180° swing puts the super-heated door well away from you during quenching operations. Spring-loaded phenolic handle stays cool to the touch and serves as both handle and latch, and a door shield protects the firebrick and reduces heat at the door and handle.
3" Firebrick ConstructionThicker than standard 2.5" brick, using Thermal Ceramics insulating firebrick made exclusively in Augusta, Georgia. Provides faster heat-up and higher temperature potential.
High-Temperature Element WireSpecial alloy normally reserved for high-temperature ceramic kilns, engineered to perform reliably at 2350°F maximum temperature for all steel types.
Quiet Drive Solid State RelayStandard on all KO ovens: Evenheat's patented relay has no moving parts and fires 60 times per second for ultra-tight temperature control.
Swing View Control EnclosurePivoting, adjustable control housing lets you rotate the controller to your preferred viewing angle during programming, then lay it flat for across-the-shop visibility.
Reinforced Stand with Tool RestUpgraded heavy-duty stand design with integrated tool rest for tongs, gloves, and other heat treating accessories.
Technical specifications
ModelKO 18
SKUEH-KO-18
Chamber dimensions18" D × 9" W × 5.5" H
Cubic feet0.52 cu ft
Maximum temperature2350°F (1288°C)
Voltage240V
Amperage13 amps
Watts3,120 watts
Brick thickness3" insulating firebrick
Estimated shipping weightContact for specification
Warranty2-year limited (registration required within 30 days)
Warranty: Two-year limited warranty from Evenheat. Must be registered within 30 days of delivery. Valid only through authorized dealers — Peach State Pottery is an authorized Evenheat dealer.
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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