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KF Extreme Series

Extra Deep - Dual Door

Go deep with Evenheat's KF Extreme Series Ovens.

Our KF Extreme models are available in depths from 31.5" all the way up to 49.5". They feature dual doors and share the side-element-only design of the LB Series for phenomenal temperature distribution.

Users include sword makers, volume knife and heat treaters, Damascus steel makers and anyone needing lots of real estate.

The KF Extreme's are available in a variety of control choice options as well as our Quiet Drive Solid State relays, which you want.

We offer the KF Extreme models in 5 depths: 31.5", 36", 40.5, 45"and 49.5". Please see the Specifications section below for details.

Features

Chamber Depths from 31.5" to 49.5"

The KF Extreme Series are designed for long work such as Damascus steel production, firearm parts and of course swords and beyond.

Chamber depths start at 31.5" and go all the way to 49.5".

Side-Only Heating Elements

KF Extreme models are designed with side-only heating elements. This is the same design that is used in our LB Series that provides excellent temperature distribution along the entire length of the chamber.

Dual Side Opening Doors

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

Cool Touch Handles

The handles/latches on our swing out doors are conveniently located at the front of the door, not hidden along the side. These spring loaded, phenolic handles are cool to the touch, one-handed in design and serve as the door latches as well.

Relay Access Port

All KF Extreme models incorporate our Relay Access Port for simple, no-panel-off relay replacement.

Simply remove the access plate to gain access to the relay. There's no need to remove the control panel and dig into the internal wiring. It's absolutely simple and effective and all it takes is a screwdriver!

It's a given that mechanical relays will fail at some point. This relay access port really comes in handy when they do.

Door Shields

The KF Extreme's feature door shields to provide protection against firebrick damage as well as to reduce the temperature seen at the doors and door handles.

Swing View Equipped

Our TAP II and Rampmaster temperature controls are fitted to our Swing View Adjustable Enclosure.
 
The swing view is a pivoting, swing-up enclosure that allows you to rotate the control to a comfortable viewing and programming angle. Once you're done, lay it back down to see it from across your shop. It's that simple.
 
The swing view pairs well with touchscreen controls like the TAP II as viewing angle can be perfectly aligned. You'll love it.

Firebrick Construction

Like all our heat treat ovens, KF Extreme models are built completely of firebrick.

Firebrick has the desired characteristic of storing heat and then releasing it slowly and gently during the soak/hold portion of the process. It's this particular quality that serves the heat treat process so well and that's why we use it.

Loud Alarm Output Jack

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

2200°F Maximum Temperature

The maximum usable temperature for the KF Extreme models is 2200°F (1204°C). This maximum is well within the range for the vast majority of steels used by knife makers and machine shops.

This maximum temperature is limited by the heating element wire used. We use a Sandvik Nickel-Chrome alloy wire for all KF Extreme model heating elements. This alloy has proven to last, it tends to stay put and generally plays very nice when used at temps below 2200°F.

Maintenance Parts Tag

To assist you in replacing worn items we have included a maintenance parts tag indicating the proper Evenheat part numbers for anticipated maintenance items.

Wish we had this decades ago.

Strong Stand and Tool Rests

Stands are strong and include a tool rest at each end. Cool!

Build Options

TAP II or Rampmaster Controls Option

KF Extreme models are available with your choice of the TAP II or Rampmaster temperature controllers.

 

Check out our Controls tab for detailed descriptions of both controls.

Quiet Drive Solid State Relay Option

All KF Extreme models are available with our Quiet Drive Solid State Relay option.

Our Quiet Drive Solid State Relay System offers tight temperature control, high reliability and increased heating element life. The Quiet Drive is arguably the best designed and best performing solid state system on the market.

Power Interrupt Switch Option

The Power Interrupt Switch removes power from all heating elements as the door is opened and re-applies power as the door is closed.

The switch used for this feature is a true safety switch and is designed specifically for safety applications. This safety switch will literally tear apart and open any welded or stuck contacts - true safety!

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Voltage Options

Our default production for KF Extreme Series models is 240V, Single Phase.

 

We do offer to build KF Extreme Series models​ in 200V, 208V, 220V and 230V by request.

All controls available on the KF Extreme Series models will operate properly on both 50Hz and 60Hz line frequencies. 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.

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Voltage Phase Options

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

3 phase Delta and Wye (380V, 400V and 415V) designs are not available.

Specifications

KF Extreme 31.5

Chamber Dimensions:

31.5" D x 10" W x 6.25" H - 1.18 Cubic Feet

(80cm D x 25.4cm W x 16.5cm H - 33.4L)

Outside Dimensions:

37" D x 20" W x 19.5" H

(94cm D x 50.8cm W x 49.5cm H)

Maximum Use Temperature:

2200°F (1205°C)

Standard Electrical:

240 Volts, 30 Amps, 7200 Watts, 50/60Hz, Single Phase

Power Cord Plug Configuration - NEMA 6-50

Weight:

150lb. (68Kg) - 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
Evenheat kiln products may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

KF Extreme 36

Chamber Dimensions:

36" D x 10" W x 6.25" H - 1.35 Cubic Feet

(91.4cm D x 25.4cm W x 16.5cm H - 38.2L)

Outside Dimensions:

41.5" D x 20" W x 19.5" H

(105.4cm D x 50.8cm W x 49.5cm H)

Maximum Use Temperature:

2200°F (1205°C)

Standard Electrical:

240 Volts, 30 Amps, 7200 Watts, 50/60Hz, Single Phase

Power Cord Plug Configuration - NEMA 6-50

Weight:

160lb. (73Kg) - 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
Evenheat kiln products may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

KF Extreme 40.5

Chamber Dimensions:

40.5" D x 10" W x 6.25" H - 1.52 Cubic Feet

(102.9cm D x 25.4cm W x 16.5cm H - 43L)

Outside Dimensions:

46" D x 20" W x 19.5" H

(116.8cm D x 50.8cm W x 49.5cm H)

Maximum Use Temperature:

2200°F (1205°C)

Standard Electrical:

240 Volts, 30 Amps, 7200 Watts, 50/60Hz, Single Phase

Power Cord Plug Configuration - NEMA 6-50

Weight:

175lb. (80Kg) - 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
Evenheat kiln products may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

KF Extreme 45

Chamber Dimensions:

45" D x 10" W x 6.25" H - 1.69 Cubic Feet

(114.3cm D x 25.4cm W x 16.5cm H - 47.9L)

Outside Dimensions:

50.5" D x 20" W x 19.5" H

(128.3cm D x 50.8cm W x 49.5cm H)

Maximum Use Temperature:

2200°F (1205°C)

Standard Electrical:

240 Volts, 30 Amps, 7200 Watts, 50/60Hz, Single Phase

Power Cord Plug Configuration - NEMA 6-50

Weight:

185lb. (84Kg) - 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
Evenheat kiln products may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

KF Extreme 49.5

Chamber Dimensions:

49.5" D x 10" W x 6.25" H - 1.86 Cubic Feet

(125.7cm D x 25.4cm W x 16.5cm H - 52.7L)

Outside Dimensions:

55" D x 20" W x 19.5" H

(139.7cm D x 50.8cm W x 49.5cm H)

Maximum Use Temperature:

2200°F (1205°C)

Standard Electrical:

240 Volts, 30 Amps, 7200 Watts, 50/60Hz, Single Phase

Power Cord Plug Configuration - NEMA 6-50

Weight:

200lb. (91Kg) - 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
Evenheat kiln products may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Accessories

MK2 Blade Fixture

We're not sure that a blade fixture is of any use in a KF Extreme model but we offer it up in case you have a need for one. Holds up to 6 blades.

 

Note: This blade fixture is too wide to fit into KH models.

Loud Alarm Option

The Loud Alarm adds 80db of irritatingly blissful alarm noise to the otherwise anemic on-board control alarm. Shops are noisy and the Loud Alarm rips through and lets you know when it's time to act. Never miss another quench.

The loud alarm attaches and plugs easily into your TAP or Rampmaster equipped control panel and can easily be added at any time.

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