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Vertical Air Bath 30 Knife Kiln

Price: Click below for pricing and options!
Part Number: VAB 30
Ships Motor Freight

Introducing the revolutionary Vertical Air Bath Furnace!

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Explore and purchase Jen-Ken Vertical Air Bath Knife Kilns at!

What do bladesmiths want from the perfect heat-treating oven? What innovations could elevate their craft?

We sought the wisdom of seasoned professionals and, armed with their insights, developed a groundbreaking line of heat treat ovens and furnaces. Our Vertical Air Bath Knife Kilns redefine traditional heat-treating, enhancing every aspect of your process.

Experience the pinnacle of precision and performance with these expertly engineered kilns, designed to meet the unique demands of bladesmiths.


6 ways our Vertical Air Bath kilns outrank other heat-treating furnaces

  1. Vertical Blade Suspension: 
    Prevents warps! Unparalleled, stress-free heat distribution!

  2. Top Loading: 
    The best heat recovery on full loads! 

  3. Power Interrupt Lid Switch:
    Assures workshop safety--blades can't touch live elements!

  4. Rolling Stand with Casters:
    Space flexibility and portability keep your workshop safe!

  5. Large Capacity:
    Holds 12+ blades in a single load!

  6. Configurable Baffle Design: 
    Allows blades of all shapes to process together!

How other knife kilns work

Blades are inserted horizontally into a standard front-loading oven for normalization, hardening, or tempering. As temperatures rise, blades can bend and warp from leaning on their sides. Uneven heat distribution in these kilns exacerbates warping. They heat from the sides and back, causing the front door area to be cooler. This results in the tip and body of the blade being hotter than the tang, leading to internal stress and more warping potential. Blades in the middle receive the least heat.


When the front door is opened, the red-hot blade must be carefully transferred from horizontal to vertical for quenching. This transition can cause further bending, requiring time-consuming straightening. The traditional kiln design also occupies significant workshop space, often necessitating deep tables or stands. This setup can force you to reach around a hot kiln, creating a dangerous workspace.


Why Jen-Ken Vertical Air Bath kilns work so well

Uniform heating.  We've solved the issue of uneven heating with our innovative Vertical Air Bath furnace series. By suspending blades vertically, our furnace provides 360° heat, ensuring uniform heat soaking at the desired temperature. The refractory brick furnace, equipped with a specially designed baffle, contains heat below the baffle when the lid opens.

Efficient handling. A unique cool touch handle, which is reversible to either side, allows you to lift the lid from the side without a blast of heat. Blades can be easily removed with tongs, and the lid is quickly lowered to minimize heat loss. The chamber is heated from below the baffle with additional coils in the top for faster recovery when blades are removed.

Enhanced safety. The power-interrupt lid switch de-energizes the oven as you remove a blade, then reheats when the lid is closed, quickly returning to the full holding temperature. Blades never touch the kiln or each other, reducing heat sinks, cold spots, and warping. The vertical suspension ensures spines remain straight as blades are removed and lowered directly into the oil quench, allowing uniform heat absorption and unimpeded movement.


Large capacity.  The Vertical Air Bath chamber comfortably holds up to 12 blades of varying shapes. Blades can be suspended using a pin through the tang, a spring clasp, or by turning the tang sideways between movable ceramic rods. Foil-wrapped blades can also be suspended using the support pin or spring clasp method. This versatile suspension format leaves your blades stress-free and straight throughout the process.


Why you'll love it!

The Vertical Air Bath is a smarter, safer, and more portable design, made to optimize your efforts and make your workshop safer. The furnace comes with a rolling stand, allowing you to move it out of the way when not in use, saving valuable bench space. You'll save time and effort by reducing warps and waves in your knives. The power-interrupt lid switch prevents your blades from touching live elements, enhancing workshop safety.


The Vertical Air Bath is equipped with a standard 3-button controller loaded with popular normalizing, tempering, and heat treatment schedules. You can upgrade to a 12-button controller for ease of programming or choose the popular TAP smart touchscreen controller. All of our kilns, ovens, and furnaces come with standard mechanical relays, which can be upgraded to solid-state technology.



Kiln Specifications: Vertical Air Bath 30

  • Dimensions Inside:  Lower chamber: 22" deep, Upper chamber: 7" to bottom of divider, Overall inside: 11" x 30"
  • Outside Dimensions: 16" x 34"
  • Volts: 240
  • Amps: 26
  • Watts: 6,240
  • Receptacle: 6-30R, 240 volts, 30 amp breaker
  • Weight:  Kiln 110 lbs, shipping 150 lbs (motor freight)
  • Included:  Kiln, Kiln switch, stand with casters, set of 6 ceramic rods, pins and springs, user manual

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