Brandon Bearden Posted October 7, 2022 Share Posted October 7, 2022 (edited) I am going to build a heat treat oven. It will be semi based on the design from Jen-Ken. It should be able to handle knifes with a 25" blade and 7" handle. I am going to use 2" thick ceramic fiber board wrapped with another 2" of wool contained with sheet metal. I am going to bond the board with Blakebond Refractory Mortar. The top and bottom will both be 4" thick with 2" recessed into the chamber. This has been purchased already and arrived today, (except the metal). It will 36" tall without the stand. This will be about a 12,000 watt system. I have been banging my head trying to understand how to size Kanthal wire and think I finally have it figured out. I have a spreadsheet that I built that anyone could use and input their values to get the lengths of wire they need to buy. I wanted to run my calculation sheet by someone else. If anyone finds it useful, feel free to take it and do whatever you want with it. There are only a few fields to enter. I have most of the materials, including a controller, already purchased. I will be using an Omron E5AC-QX4D5M-010 with the software, (CX-THERMO VERSION 4), for heat treatment. I will use another, differently calibrated for lower temps, controller and temp sensor for tempering. (Omron E5CC-RX3A5M-001). The relay will be Omron as well, G3NA-490B-UTU-2 AC100-240. It will probably take me a couple of months to get this thing built based on life circumstances at the moment. I didn't want to post until I had more to show than a partial drawing and some specs, but I need help ordering the correct wire. If anyone has thoughts on the design too, I am all ears. The opening inside the baffle is about 9x15" k1 wire calc sheet.xlsx Edited October 7, 2022 by Brandon Bearden Link to comment Share on other sites More sharing options...
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