Double Barrel KM 18-T Heat Treating Kiln
Uses: Heat Treating Knife Making
Paragon Double Barrel 18T Heat Treating Furnace
Long lasting solid state relay
The Double Barrel 18T now has a solid state relay, which lasts far longer than a standard mechanical relay. The solid state relay has no moving parts to wear out. The first thing you will notice is that the solid state relay is silent. You will hear just the reassuring hum of elements. The solid state relay makes heating elements last longer and offers better temperature control during holds.
The Double Barrel 18T includes a mechanical relay as part of a safety circuit.
The Paragon Double Barrel 18T is just the right size for heat treating and case hardening gun parts and knives. Experiment with color base hardening. Restore the faded colors of historic guns. As with the other Paragon furnaces, the Double Barrel 18T has a digital controller so you can program the exact temperature and hold time needed.
The controller eliminates guesswork. Instead of estimating a temperature by the color of the heat, just program a temperature. You will no longer have to adjust a switch to maintain the hold time for case hardening; the controller maintains the hold time for you. Set the hold time for as long as necessary (typically two hours).
Choose a side swing door or a drop door
You can order a Paragon Double Barrel 18T heat treating furnace with either a drop door or a side-swing door. The photo above shows the traditional drop door. We will verify your choice by telephone after your purchase. The price of the furnace is the same with either door style.
The drop door opens downward with one-handed operation. A counter-weight handle holds the door securely closed. The door, whether drop or side-swing, is mounted on a heavy-duty 1/2” thick hinge shaft for smooth opening. Because of the rigid case and heavy hinge, the door is sturdy enough for years of faithful service.
Optional Gas Injection Flow Meter
During heat treating, scale forms on the surface of the steel. One way to eliminate most scaling is to wrap the steel in stainless steel foil. Another way is to install the gas injection flow meter on your furnace. It is available as either an add-on kit, or you can order the furnace with the meter installed.
The meter regulates the flow of an inert gas, such as argon, inside the furnace. The gas displaces the oxygen to prevent most scaling.
Please remember that results with the flow meter vary depending on the type of inert gas you use and your level of experience.
Optional Sentinel touch-screen controller
This kiln can be ordered with the optional Sentinel Smart Touch controller instead of the standard Sentry 2.0 12-key controller. Click Here to learn more about this exciting new technology.
Choose from the optional paint colors
As shown in the photos, the standard knifemaking furnaces are painted a deep black, which would look perfect in your shop. You can choose a different paint color at no extra charge.
Door safety switch
The door micro safety switch shuts off the power to the elements when the door is opened, yet the controller continues to give a temperature readout. The safety switch is standard on Paragon Double Barrel furnaces.
Superior heat distribution
To improve the heat distribution in the Double Barrel 18T, we have added heating elements in the top and removed the heat from the back. The furnace now heats from three directions--the two sidewalls and the top for uniform heating.
The Sentry temperature controller
The Sentry 12-key controller comes with powerful, easy-to-use features. It can give you the cost of electricity to heat treat a load of parts, adjust the rate of heating, and correct programming errors by undoing steps that you need to correct. Before firing the furnace, use Program Review to check that the program you are about to fire is correct. Set an audible temperature alarm to remind yourself to attend to the furnace at a particular temperature.
For peace of mind, you can lock the program that is in active memory. You can also delay the time that the firing is to start. The kiln will turn on at that time. The Sentry comes with a 30-month warranty.
Solid furnace construction
The furnace is insulated with 3” thick refractory firebrick, which is 1/2” thicker than the standard. The sidewall elements are mounted in dropped, recessed grooves machined into the firebrick. This groove protects the element for long life and low maintenance. The elements in the top are seated in pinless element grooves. The firing chamber is protected by a rigid steel case. A built-in solid stand lifts the firing chamber safely off your worktable. The thermocouple wire is kept inside the control box for protection from the harsh environment of the typical bladesmith shop.
Printed instruction manuals
Your furnace includes a wiring diagram, a controller instruction manual, and a heat treating manual with heat treating instructions for D2, 440C, ATS 34 and 154 CM. The manuals are written in plain English for the beginner.
Thermocouple with “special limit” wire
The thermocouple senses temperature inside the kiln. It is the small rod that extends into the firing chamber. The ¼” wide Type-K, 14-gauge, exposed-tip thermocouple is made with special-limit wire for superior accuracy. The exposed tip gives the controller a fast response time for even temperatures during holds. The thermocouple is made in America to our exacting standards.
Circuit Copper Wire Size
TUV tested to CSA and UL Standard 499
Front Loading Square
Understanding Chamber Measurements
The Outer Size of the Kiln and the Shipping Size: Width = Left to Right; Depth = Front to Back; Height = Top to Bottom
20.00W x 32.00D x 18.00H Inches
508W x 813D x 457H mm
29.00W x 38.00D x 30.00H Inches
737W x 965D x 762H mm
Doorway Clearance Needed
Ship Method & Notations
This Kiln Ships Via Truck
Disclaimer: The specifications above assume that the kiln will be plugged into a dedicated circuit. Local electric codes supersede our recommendations.
The pricing and electrical specifications for the above products reflect their design for use in the United States. The International versions of most models will have variations in electrical specifications and price due to consumer safety requirements or electrical regulations.