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Evenheat KF Extreme Series Heat Treating Oven

Save $917.00
Original Price $4,585.00
Current Price $3,668.00
Oven size selection
Controller selection
Solid State Relay

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Unleash the Power of Depth with Evenheat's KF Extreme Series Ovens

Dive into the depths of precision heat treatment with the Evenheat KF Extreme Series Heat Treating Oven, uniquely designed for those who demand more. The KF Extreme Series, available in an extraordinary range of depths, is the ultimate solution for sword makers, high-volume knife and heat treaters, Damascus steel artisans, and anyone in need of expansive workspace.

Expansive Depths for Unlimited Possibilities

The KF Extreme models redefine spatial capacity in heat treating, with depths ranging from 31.5" to an impressive 49.5". These ovens are equipped with dual doors, ensuring easy access and efficient operation, even for the largest projects.

Exceptional Temperature Distribution

Embracing the side-element-only design of the renowned LB Series, the KF Extreme ovens guarantee exceptional and consistent temperature distribution. This feature is critical for precise heat treatment, making it a favorite among professionals.

Tailored for the Artisans

Whether you are forging swords, crafting volume knives, creating Damascus steel, or require extensive space for your projects, the KF Extreme Series is tailored to meet your needs. Its versatility caters to a wide range of users, offering a professional solution to every ambitious project.

Control Options for Precision and Ease

Choose from the RampMaster 3 or TAP II control options to suit your specific needs. Each KF Extreme oven comes with the option of the Quiet Drive Solid State relays, ensuring silent, efficient, and reliable operation. Truly, this feature is not just an option; it's a necessity for precision and ease in heat treatment.

Five Depth Choices to Suit Every Need

The KF Extreme Series is available in five different depths: 31.5", 36", 40.5", 45", and 49.5". Select the size that best fits your project requirements and never feel restricted again.

Specifications at a Glance:

  • Depths ranging from 31.5" to 49.5"
  • Dual door design for easy access
  • Side-element-only design for superior temperature distribution
  • Ideal for sword makers, Damascus steel artisans, and more
  • Variety of control options including Quiet Drive Solid State relays

Your Ultimate Heat Treating Companion

Embrace the power and capacity of the Evenheat KF Extreme Series Ovens. Take the first step towards transforming your heat treating experience. With the KF Extreme Series, the depth of your creativity knows no bounds.

Chamber Dimensions 

31.5" Deep x 10" Wide x 6.25" High - 1.18 Cubic Feet

(80 cm Deep x 25.4 cm Wide x 16.5 cm High - 33.4 L)

Outer Dimensions

37" Deep x 20" Wide x 19.5" High

(94 cm Deep x 50.8 cm Wide x 49.5 cm High)

Maximum Temperature

2200°F (1205°C)

Electrical

240 Volts, 30 Amps, 7200 Watts, 60Hz, Single Phase

Power Cord Plug Configuration - NEMA 6-50

Default production for KF Extreme Series models is 240V.

​Evenheat will build KF Extreme Series models​ in 200V, 208V, 220V and 230 by request.

After submitting your order - send an email to support@potterypulse.com to ensure this request is not missed.

Model will operate properly on both 50Hz and 60Hz. To say it another way, line frequency has no effect. It doesn't matter. Evenheat recommends that you check your operating voltage before ordering or placing the oven in service.

​Model not available in 3 phase Delta or Wye (380V, 400V, 415V) designs. 

KF Extreme Series models are produced in a single phase design only.

Shipping Weight

​150lb. (68 Kg) - Approx.

Shipping Method

​Freight Truck​​

NRTL Agency Listing

TUV Listed United States and Canada - Designed and Tested to CSA & U/L 499

California Prop 65

KH models may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Chamber Dimensions 

36" Deep x 10" Wide x 6.25" High - 1.35 Cubic Feet

(91.4 cm Deep x 25.4 cm Wide x 16.5 cm High - 38.2 L)

Outer Dimensions

41.5" Deep x 20" Wide x 19.5" High

(105.4 cm Deep x 50.8 cm Wide x 49.5 cm High)

Maximum Temperature

2200°F (1205°C)

Electrical

240 Volts, 30 Amps, 7200 Watts, 60Hz, Single Phase

Power Cord Plug Configuration - NEMA 6-50

Default production for KF Extreme Series models is 240V.

​Evenheat will build KF Extreme Series models​ in 200V, 208V, 220V and 230 by request.

After submitting your order - send an email to support@potterypulse.com to ensure this request is not missed.

Model will operate properly on both 50Hz and 60Hz. To say it another way, line frequency has no effect. It doesn't matter. Evenheat recommends that you check your operating voltage before ordering or placing the oven in service.

​Model not available in 3 phase Delta or Wye (380V, 400V, 415V) designs. 

KF Extreme Series models are produced in a single phase design only.

Shipping Weight

​160lb. (73 Kg) - Approx.

Shipping Method

​Freight Truck​​

NRTL Agency Listing

TUV Listed United States and Canada - Designed and Tested to CSA & U/L 499

California Prop 65

KH models may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Chamber Dimensions 

40.5" Deep x 10" Wide x 6.25" High - 1.52 Cubic Feet

(102.9 cm Deep x 25.4 cm Wide x 16.5 cm High - 43 L)

Outer Dimensions

46" Deep x 20" Wide x 19.5" High

(116.8 cm Deep x 50.8 cm Wide x 49.5 cm High)

Maximum Temperature

2200°F (1205°C)

Electrical

240 Volts, 30 Amps, 7200 Watts, 60Hz, Single Phase

Power Cord Plug Configuration - NEMA 6-50

Default production for KF Extreme Series models is 240V.

​Evenheat will build KF Extreme Series models​ in 200V, 208V, 220V and 230 by request.

After submitting your order - send an email to support@potterypulse.com to ensure this request is not missed.

Model will operate properly on both 50Hz and 60Hz. To say it another way, line frequency has no effect. It doesn't matter. Evenheat recommends that you check your operating voltage before ordering or placing the oven in service.

​Model not available in 3 phase Delta or Wye (380V, 400V, 415V) designs. 

KF Extreme Series models are produced in a single phase design only.

Shipping Weight

​175lb. (80 Kg) - Approx.

Shipping Method

​Freight Truck​​

NRTL Agency Listing

TUV Listed United States and Canada - Designed and Tested to CSA & U/L 499

California Prop 65

KH models may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Chamber Dimensions

45" Deep x 10" Wide x 6.25" High - 1.69 Cubic Feet

(114.3 cm Deep x 25.4 cm Wide x 16.5 cm High - 47.9 L)

Outer Dimensions

50.5" Deep x 20" Wide x 19.5" High

(128.3 cm Deep x 50.8 cm Wide x 49.5 cm High)

Maximum Temperature

2200°F (1205°C)

Electrical

240 Volts, 30 Amps, 7200 Watts, 60Hz, Single Phase

Power Cord Plug Configuration - NEMA 6-50

Default production for KF Extreme Series models is 240V.

​Evenheat will build KF Extreme Series models​ in 200V, 208V, 220V and 230 by request.

After submitting your order - send an email to support@potterypulse.com to ensure this request is not missed.

Model will operate properly on both 50Hz and 60Hz. To say it another way, line frequency has no effect. It doesn't matter. Evenheat recommends that you check your operating voltage before ordering or placing the oven in service.

​Model not available in 3 phase Delta or Wye (380V, 400V, 415V) designs. 

KF Extreme Series models are produced in a single phase design only.

Shipping Weight

​185lb. (84 Kg) - Approx.

Shipping Method

​Freight Truck​​

NRTL Agency Listing

TUV Listed United States and Canada - Designed and Tested to CSA & U/L 499

California Prop 65

KH models may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Chamber Dimensions 

49.5" Deep x 10" Wide x 6.25" High - 1.86 Cubic Feet

(125.7 cm Deep x 25.4 cm Wide x 16.5 cm High - 52.7 L)

Outer Dimensions

55" Deep x 20" Wide x 19.5" High

(139.7 cm Deep x 50.8 cm Wide x 49.5 cm High)

Maximum Temperature

2200°F (1205°C)

Electrical

240 Volts, 30 Amps, 7200 Watts, 60Hz, Single Phase

Power Cord Plug Configuration - NEMA 6-50

Default production for KF Extreme Series models is 240V.

​Evenheat will build KF Extreme Series models​ in 200V, 208V, 220V and 230 by request.

After submitting your order - send an email to support@potterypulse.com to ensure this request is not missed.

Model will operate properly on both 50Hz and 60Hz. To say it another way, line frequency has no effect. It doesn't matter. Evenheat recommends that you check your operating voltage before ordering or placing the oven in service.

​Model not available in 3 phase Delta or Wye (380V, 400V, 415V) designs. 

KF Extreme Series models are produced in a single phase design only.

Shipping Weight

​200lb. (91 Kg) - Approx.

Shipping Method

​Freight Truck​​

NRTL Agency Listing

TUV Listed United States and Canada - Designed and Tested to CSA & U/L 499

California Prop 65

KH models may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Read on to understand what makes the LB Series the Shop Standard for so many

Chamber Depths from 31.5" to 49.5"

The KF Extreme Series is expertly crafted for extended projects like Damascus steel creation, firearm components, and, naturally, swords and more.

Available in a range of chamber depths, starting from 31.5" and extending up to 49.5", these ovens cater to a variety of lengthy workpieces.

Interior view into an Evenheat KF Extreme firing Chamber to demonstrate extreme depths with options from 31.5-inches to 49.5" inches

Side-only Heating Elements

KF Extreme models feature side-only heating elements, a design approach shared with Evenheat's LB Series, ensuring outstanding temperature distribution throughout the entire length of the chamber.

Interior view of heated firing chamber of an Evenheat KF Extreme heat treating oven to demonstrate side-only heating elements

Dual Side Opening Door

The extra deep chambers of the KF Extreme's require the use of dual doors, front and back.

Product photo of an Evenheat KF Extreme Series Heat Treating Oven showing both front and back-side doors open

Cool Touch Handle

Evenheat's innovative swing-out door boasts a front-positioned handle/latch for effortless access, eschewing the traditional side placement. This handle, made from cool-to-the-touch phenolic material, is designed for one-handed operation and also serves as the door latch, merging ease of use with practical functionality.

Evenheat Heat Treating Oven with close up on the cool-to-the-touch door handle

Relay Access Port

Every KF Extreme model includes our innovative Relay Access Port, designed for hassle-free relay replacement without the need to remove the entire control panel.

To access the relay, simply remove the access plate – there's no need to delve into the internal wiring or dismantle the control panel. This straightforward and efficient process requires just a screwdriver!

Considering that mechanical relays are bound to fail eventually, this easily accessible relay port proves to be extremely useful when the time comes.


Door Shields

The KF Extreme is equipped with door shields, serving a dual purpose: they safeguard against damage to the firebrick and also minimize the heat exposure on the doors and door handles, enhancing safety and durability.

Close up of chamber door on Evenheat Heat Treating Oven to feature door shield designed for protection from heat

Swing View Equipped

Evenheat seamlessly integrates its sophisticated TAP II and RampMaster 3 temperature controls into the revolutionary Swing View Adjustable Enclosure.

This innovative design features an adjustable, swing-up enclosure, enabling you to easily set the control panel at your ideal viewing and programming angle. Once adjusted, it can be smoothly returned to a flat position, providing excellent visibility from anywhere in your workshop. The design is intuitive and user-friendly, improving overall interaction.

Particularly beneficial for touchscreen controls like the TAP II, the Swing View Adjustable Enclosure allows for perfect alignment with your viewing angle, greatly enhancing the user experience with its practical and ergonomic design.

Close up of digital controller on Evenheat Heat Treat Oven placed within a swing view adjustable enclosure

Loud Alarm Output Jack

A Loud Alarm output jack is included to connect the optional Loud Alarm. Enjoy 80db of irritating alarm bliss and never miss another quench.

Close up of loud alarm mechanism on Evenheat Heat Treat Oven with inset image of alarm kit elements

2200°F (1205°C) Maximum Temperature

The KF Extreme models boast a maximum operational temperature of 2200°F (1204°C), a range that comfortably accommodates most steels used in knife making and machine shop applications.

The peak temperature capability is dictated by the type of heating element wire employed. For all KF Extreme model heating elements, we utilize a Sandvik Nickel-Chrome alloy wire. This alloy is renowned for its durability and stability, maintaining its integrity and performing exceptionally well at temperatures up to 2200°F.

Interior view of heated firing chamber of an Evenheat KF Extreme heat treating oven to demonstrate side-only heating elements the can reach 2200F

Maintenance Parts Tag

Evenheat has simplified the replacement of worn parts by introducing a maintenance parts tag. This handy tag lists all the relevant Evenheat part numbers for frequently maintained components, streamlining your maintenance process. This thoughtful innovation is designed to ease your maintenance workload. It's exactly the kind of feature you've probably wished for in the past, right?

close up view of maintenance parts tag featured on the Evenheat KF Extreme 49.5 Heat Treating Oven

Strong Stand and Tool Rest

Stands are strong and include a tool rest. Cool!


The Power Interrupt Switch enhances safety by automatically cutting off power to the heating elements when the door opens and restoring it upon closure.

Employing a specialized safety switch, this feature is expertly designed for critical safety functions. The robust construction of the switch includes a mechanism that effectively separates and opens any contacts that may have fused or stuck, ensuring reliable and genuine safety.

Are you looking to avoid the hassles and maintenance costs associated with the failure of mechanical relays?

Then take a closer look at the Quiet Drive Solid State Relay option, available in all KF Extreme Series models.

Evenheat confidently anticipates that its solid state relay will endure for the entire lifespan of your unit. We strongly recommend it. Read on to understand why.

Close up of Evenheat's Quite Drive Solid State Relay System

Understanding Relays: The Solid State Advantage

Solid state relays (SSRs) offer a robust and more reliable alternative to traditional mechanical relays, which operate with metal contacts that open and close via an electrically arcing magnet coil. SSRs, made from solid semiconductor materials, eliminate the need for moving parts and electrical arcing, resulting in several benefits, particularly in kiln applications where superior temperature control is crucial.

Benefit 1 - Longer Lifespan

SSRs' lack of moving parts and absence of electrical arcing contribute to a substantially longer life expectancy compared to mechanical relays. In kilns and furnaces, mechanical relays are often identified by a distinctive clicking sound, indicating wear over time due to constant switching, which can lead to expensive repairs. In contrast, Evenheat's SSRs offer silent, reliable performance over the long term.

Benefit 2 - Precise Temperature Management

Whereas mechanical relays are limited to a minimum cycle of 10 to 14 seconds to balance control with relay lifespan, SSRs operate at a much faster rate of 120 cycles per second. This rapid operation allows for more immediate adjustments and finer temperature control, an advantage fully utilized in all Evenheat control designs.

Benefit 3 - Enhanced Durability of Heating Elements

The KF Extreme Series Heat Treating Oven from Evenheat uses SSRs featuring Zero Crossing technology. This technology switches the relay on and off precisely at 0V during fluctuations in AC power, greatly extending the life of heating elements compared to those reliant on mechanical relays. Zero Crossing ensures optimal voltage for the heating elements, thus maximizing their service life.

Design Feature - 30 Amp SSRs Operating at 15 Amps

Evenheat selects high-quality SSRs rated for 30 amps but operates them at a reduced 15 amps. This provides a safety margin, ensuring long-lasting and reliable performance. Running SSRs at half their rated capacity helps maintain cooler operation under a 15 amp load, keeping them well within their performance curve for optimal functioning.

Design Feature - Externally Mounted SSR Heatsinks

For optimal SSR performance, effective cooling is essential. Evenheat achieves this by mounting SSR heatsinks externally. This placement allows for free airflow and prevents heat build-up inside the unit, thereby avoiding premature component failure and extending the life of the SSRs. The heatsinks are strategically positioned on standoffs to create a gap, enhancing airflow and reducing heat transfer. This design approach has proven successful, with a six-year track record of zero failures.

Optimal Temperature Control in Kiln Operations with Evenheat

Evenheat, in collaboration with SDS Industries and Bartlett Instrument, delivers exceptional design, technology, and performance in kiln control systems. The TAP stands out in this lineup as a state-of-the-art touchscreen controller, adept for all firing and heat processing needs and epitomizing the zenith of control technology. For enthusiasts of the traditional approach, the RampMaster 3 offers comprehensive control with an intuitive four-digit interface.

RampMaster 3: The Standard in Heat Treatment Control

The RampMaster 3 redefines excellence in heat treating ovens. It boasts a four-digit display and is equipped with twelve program slots for tailored heat treatment procedures. Its accessible numbered keypad and program review feature enhance the user experience. Crucially, it is integrated with the Quiet Drive Solid State Relay System, offering unmatched control and convenience. This combination positions the RampMaster 3 as a premier choice for precise kiln temperature management.

TAP II: The Forefront of Temperature Control Technology

The Evenheat TAP II represents the cutting edge in temperature control, merging ease of use with comprehensive functionality and user-centric design. It facilitates easy access to programs with its clear, readable displays. The TAP II aids in the meticulous creation and fine-tuning of programs, featuring unlimited storage capacity without the worry of data loss. Renowned for its reliable and precise performance, particularly when paired with the Quiet Drive Solid State output, it guarantees superior results. Additionally, the TAP II offers convenient connectivity through Wi-Fi or Ethernet, compatible with its app available on both iOS and Android platforms, making it a truly innovative and indispensable control tool in kiln operations.

Estimated order to ship lead time is 6 weeks.

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