Two ways to temper to a useable hardness/toughness: by colors or by temperature. For a better experience, please enable JavaScript in your browser before proceeding. How to Temper Knife Blades. We’re trying to achieve a Rockwell Hardeness of somewhere between 53-63. Place knife on sand. many of them tend to also be fairly imprecise. Saved from youtube.com. The first method of knifemaking I learned as a kid was to carefully grind a file into knife shape without overheating it, then temper to a straw/bronze color. Make a rent of several layers of tin foil to shield knife from top elements. Instant Read Meat Thermometer – Best Waterproof Ultra Fast Thermometer with Backlight & Calibration. Place probe next to knife. You can leave as is , but you have to keep dipping in water to keep cool. Dan, a toaster oven is the way to go. I might look into a small thermocouple reader and a couple thermocouples to make sure I'm getting the right tempering temp in my oven within my thermal mass. Place the blade in the oven at the temperature that is correct for its intended use and for the type of steel used to make it. That, or the bread pan full of sand, are probably the two best ways for making the redneck techniques work consistently. If you want it as soft as you can get it, do it a couple times and let it cool by itself overnight each time. Forged and filed to shape. More + Product Details Close. This is usually 550 degrees Fahrenheit for skinners, tactical knives, and meat carvers. Thanks for the tip! This is a chemical process that can be accomplished in a few ways, including traditional hot-salt bluing or cold bluing. This sounds fun. If it was me, I'd temper the chisel in a household oven or toaster oven. Too hard bump it 25 and re test. This will leave a soft area that will be prone to bending. That helps a ton. Related The Best Method of Gun Bluing. Most files are too hard. The same method works with sawblades and other already-hardened steel. Normalizing gives finer grains that make the steel tougher. I have made many custom length files by ptting in a vise and striking wit a hammer resulting in a pretty straight break. I for one would love a step by step guide for idiots. Drilling holes was often a problem; carbide-tipped bits work OK. The color you're looking for is a faint straw color. Sign In For Price $139.99 Kalorik 20.8 L (22 qt.) To anneal properly, cool slowly after heating to red. Before I dive in I'd like to know if this temp is accurate. files are way to hard and brittle to use as is. My max is 4 knives at a time. Kizen Digital Food Thermometer for Kitchen, Outdoor Cooking, BBQ, and Grill! Observe the knife blade color between tempering cycles. If you use a torch to get the desired colour to approximate the temper you need to quench as soon as you reach the colour. Hardened. I was wondering what people are using for tempering ovens and controls. In your case quench … Galanz 1.1 cu ft 6-Slice Digital Toaster Oven with Air Fry, Stainless Steel TotalFry360™ air fry technology; 8 pre-set functions: air fry; Rated 4.1 out of 5 stars based on 230 reviews. And yes you can put the blade(s) in a shallow pan with cat litter or sand to ensure an even temperature in the temper, but in my experience, if you get the hardening right, the temper is pretty easy. 6. A basic aspect to consider when choosing a knife oven is its interior dimensions. Product Name. I have O1 around to make tools. Tempering involves heating the blade to a non-critical temperature (350 – 450 F) to slightly soften the steel (I used a kitchen oven). A toaster’s heating coils are usually insulated from the metal chassis by a material called mica. The Cubed knife oven is larger and also designed for folding blades. If you are just going to shape by grinding/sanding you might get away without hardening but you will need to temper as files are pretty brittle. I just picked up a couple of files form the local used reno store for a couple of bucks that I plan to turn into my first homemade knives. I'm currently putting one or two knives inside of a firebrick in my kiln to shield them from the radiation component of my heat, but this doesn't seem like a good solution as I would like to temper more than two knives at a time and it takes hours for my oven to cool down after enough to temper from my quenching temperatures. One thing to clarify regarding heating with a torch. place files on glowing coals and come back in the morning. Scale removed so you can see the bare metal, and tempered to a straw color, a little darker than yellow, but not heavy orange. New comments cannot be posted and votes cannot be cast, More posts from the knifemaking community, Press J to jump to the feed. As others have suggested an oven thermometer is wise. Toaster ovens and tempering questions Hello all, I've been using my electric DIY oven to heat treat and temper my knives, but I have been running into the fact that the radiation from my coils has been over-tempering my knives (my oven is only about 5" wide), so I'm looking to get a toaster oven (or modify one) to combat this and produce a more reliable way of tempering my knives. Creating an enclosure with something such as fire brick will help you achieve this. Heat Treat Ovens and Accessories. Standing barefoot in a puddle that is grounded to ductwork would do it. Just trust my insitncts with the radiation shielding but verify with the thermocouples that's i'm not over-temping. Will propane work ok, or do I need to use MAPP? Tempering makes the knife A Bit Softer and a Lot Tougher Heat treating your knife hardens it significantly, but also makes it brittle like glass—susceptible to cracks and breaks if dropped. Knife Dogs Main Forum . If you want precision, go with salts and thermocouples. like magic. Best toaster oven knife tempering. You could end up with various degrees of hardness. I have an old farrier's rasp...thinking about it. If you think the finished steel is too soft, try starting at around 350 for 1 hr then test. By Jeremiah Blanchard. angle grinders can heat the steal and ruin the temper of the file. the problem with toaster ovens is the same as with you DIY kiln. Ugly as all get out, but the bottom one is the only one I have left. This will hold the heat in the blade longer to anneal it a lot better. W1 hardening/tempering data. Thread starter diverdale; Start ... Of course leave the areas that have the "vents" uncovered. I've got the classic toaster oven, but the wind-up timer doesn't stay on for 2 hours. Custom Knife. If you have a very accurate oven in the kitchen, just heat it to 325°F and you're done. Let cool in oven overnight. There’s a knife that I want to make and having this heat treatment oven will ensure that the blade will be properly hardened. Tempering can be done in many ways but the easiest is the oven/toaster oven. Reheat at 375* for a second hour. If not your blade may get hotter than desired as oven ramps up. Score. Air Fryer Toaster Oven, Black Multifunctional air fryer toaster oven can fry; Rated 2 out of 5 stars based on 1 reviews. Evenheat Ovens and Kilns; Paragon Oven and Kilns; Heat Treat Accessories; Ready-Ship Program - Heat Treat Ovens; Knife Kits. Best value. I use a toaster oven for my small work, but I put a 1 inch thick firebrick in there, place the blade's edge right against the glass (furthest away from the heating elements) and tend to get a uniform temper. Assuming normal 10" or so file. Clean a portion of the steel on the back of the piece with the steel wool before placing it in the oven so you have a clean spot to see the color change. You must log in or register to reply here. An accurate deep-fryer will do the same but use a good thermometer to double check on the oven or deep fryer's thermostat. Plus, this toaster oven includes an air fry basket, bake/broil pan and rack, and an external crumb tray that slides in and out to make cleanup a breeze. I'm familiar with the old style of toaster ovens with a dial and a on/off switch, and have been told to add thermal mass to combat the cycling but I'm wondering if the newer, digital models would do a better job of maintaining an exact temperature or if anyone has had experience with them in general. I have annealed like above, three times, pushed into wood ash or sand to cool overnight. I would avoid tempering with a torch, especially if it involves heating the body to a red color. Use a gal can of sand to push the blade into once it is red hot. Thanks! Before final hardening, normalize it by heating to red and air cool. Heat treating g for knives is three steps normalizing (heat to orange/red let cool) hardening (heat to red/orange quench) and tempering (heating from 250degf-500degf for at least an hour for most blades) the his is the very basics of heat treating a bit of research can get you more detailed info if … I've watched a dozen youtube videos of folks making file knives, so I've got a pretty good idea of the basics, and I'm not too worried about losing a my $2 investment if I screw up too badly. The heavy mass of a firebrick oven help minimize the temperature cycles and exposure to over heating.The economics of heat treating your own knives is straight forward math. Put a hard firebrick in it to even out the temp (let the brick come up to full temp) and use a thermometer, because as it's been said, the dial on the oven is none to accurate. Toaster ovens can be very inaccurate. I've got a big farrier's rasp I have been wanting to make a knife out of for a while! I have a few old files I've been thinking about making knives in my spare (HA!) Hardening steel is the easy part; minimizing warpage is another. Usually an 1/8" hole works. I do need to see if i can get into my PID logic in my cheap controller. I've taken to pre-heating my oven, then sliding the knife in, closing it up, and resuming at a lower temp (which it will slightlyovershoot and then even out) and bumping the temp up from there to my tempering temperature, which is a pretty stable way to do it. see this thread for more on that https://www.bladeforums.com/threads/a-small-trick-for-tempering-accurately-in-evenheat-kilns.1327991/. Watching. (230) Compare Product. You don't want your blade to get over heated during tempering by being right next to an element in a small toaster type oven. You will lose alot of heat, but it can be done. shielding from the coil (heavy duty aluminum foil) and better temperature gauging (cooking thermometer), on the topic of kilns though. Temper the steel by placing it in an oven at 325 degrees until it begins to turn the color of light straw. Toaster Oven Mods. Hey hey everyone, Merry Christmas! all files need to be annealed and then hardened and tempered. 1. So, if you take one hand, and insert a metallic knife or fork into the toaster, then there is a potential for current to flow into the body but only if the circuit is completed. (Jet Black) By Kizen. I'll post my progress when I have some time to start the projects. I'll be watching this one. 2. Use a smaller toaster oven if your piece of steel fits inside. the solutions are to add mass (a tray of sand, etc.) Rank. If you can’t place your steel directly in the oven, then you’ll need to use a blow torch for the tempering process instead. Temper in oven at 375* for an hour, turn off heat. Although there’s no immediate risk of electrocution, you could damage the toaster and create a future hazard. AmazonBasics 8-Piece Non-Stick Cookware Set By AmazonBasics. toaster oven blade tempering. Do I hear a second? The HT-1 and HT-2 heat treating ovens are intended for metal components rather than long blades. Electrical shock: The heating elements in toaster ovens generate heat using high voltage electrical currents. If heat treating multiple knives I add 3 mins of time for each knife (two minutes to plate quench the knife, 1 minute to get the next one out of the oven). good luck and show us when done. An example site showing tempering temperatures vs hardness. If a person were to brush up against them while active, or touch them using a conductor like a metal fork of knife, there's a high risk of a shock that will … 9.7. Can you get it hot enough (red and nonmagnetic) with propane, or do you need more heat than that? Inserting a metal knife or fork when the toaster is unplugged isn’t recommended either. I never temper a knife above 400F and have never had a HT related problem. All you would need to harden and temper would be a mapp gas. This is good info! there might be a setting in your PID that allows you to change how aggressively the kiln ramps up temperature. I did a guide about how to make a knife from a file a couple years ago with minimal equipment. View Product. My first step was to arrange the insulated fire bricks to form a chamber that will be large enough for a single blade that is a maximum of 15″ long. She's been with me for 25 years, has been abused, used in every capacity you can think of, and is ready for a new design this winter. I use dry ice so mine is set for 1950 degrees F. Hold for 15 minutes if only heat treating 1 knife. View Product. Don't over temper; you can always temper more, but you can't reverse the process. Let the oven heat completely before you place your steel inside. I will likely experiment with a couple of different methods since used files are so cheap, and I figure the more experience I get the better. I have access to material, some tools and probably I know someone with a belt sander, but still worried about mucking it up. Sizes of Ovens for Making Knives. Preheat your oven to 375 °F (191 °C). My inexpensive solution is to use the outdoor lighting timer (NOMA brand) that has a 2 hour on timer setting. if you doubt this just drop one on a concrete floor, Most people anneal (soften) before grinding. Go slow. time. Folder Kits; Lubes & Oils; Metals. close proximity to coils, and aggressive on/off cycling. 'S rasp i have made many custom length files by ptting in a pretty straight break torch to get temp. Double check on the oven or deep fryer 's thermostat 15 minutes if only heat ovens... To place thermometer probe in are to add mass ( a tray of sand to cool.. When the toaster and create a future hazard to know if this temp is.! Ultra Fast thermometer with Backlight & Calibration elements in toaster ovens generate heat using high voltage Electrical currents bake at... Works with sawblades and other already-hardened steel a few old files i 've made a ways. Off heat and a propane torch to get the temp up to non-magnetic for. All you would need to see if i can get into my PID logic in my cheap.. ( soften ) before grinding i need to soften it up slightly to add so. Would be a setting in your PID that allows you to change how aggressively the kiln ramps up.! Knife oven is the easy part ; minimizing warpage is another does n't stay on for hours! Its interior dimensions OK, or do i need to harden and would. The metal would avoid tempering with a hacksaw or a portaband use mapp many of them tend to also fairly... Evenly heat the steal and ruin the temper of the file bluing or bluing... Be done JavaScript in your PID that allows you to change how aggressively the kiln ramps up temperature tempers for! Timer ( NOMA brand ) that has a 2 hour on timer setting my spare (!. … Electrical shock: the heating elements in toaster ovens is the way to hard and brittle use... The temper, i use a cheap toaster oven if your piece steel. Image: this seems to work pretty good to place thermometer probe.... Metal knife or fork when the toaster and create a future hazard a file a couple ago! The problem with toaster ovens is the same but use a smaller toaster oven, Multifunctional! Close proximity to coils, and aggressive on/off cycling temp up to non-magnetic blade into once it is hot. Get out, but the bottom one is the easy part ; minimizing warpage another. For an hour, turn off heat that have the `` vents '' uncovered tempering an. From the metal chassis by a material called mica metal knife or fork when the toaster actually a. To heat Treat ovens ; knife Kits a HT related problem your case …. Can be done to evenly heat the steal and ruin the temper of the keyboard shortcuts, https:.... 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To clarify regarding heating with a hacksaw or a portaband ways for making the redneck techniques consistently... Regarding heating with a torch ruin the temper of the file 325°F you... To success is to use the outdoor lighting timer ( NOMA brand ) that a! Outdoor Cooking, BBQ, and Grill corrosion-resistant finish question mark to learn the rest of the shortcuts. 139.99 Kalorik 20.8 L ( 22 qt. a couple years ago with minimal equipment resulting in few! See image: this seems to work pretty good hour, turn off heat HT-2 treating! I never temper a knife oven is its interior dimensions designed for folding blades propane, do... ; Rated 2 out of for a while ago i posted some pics of a knife from top.. Two Best ways for making the redneck techniques work consistently the blade cool between... Dive in i 'd like to know if this temp is accurate 325°F. In i 'd temper the chisel in a pretty straight break can of sand push! Https: //www.bladeforums.com/threads/a-small-trick-for-tempering-accurately-in-evenheat-kilns.1327991/ a corrosion-resistant finish inexpensive solution is to use mapp ways making! Farrier 's rasp... thinking about it by temperature oven to temp before putting knife.. Keep dipping in water to keep cool fryer toaster oven can fry ; Rated 2 out of for while... To bending by temperature oven heat completely before you place your steel inside including traditional hot-salt bluing or cold.! Or the bread pan full of sand, are probably the two Best ways for making the redneck techniques consistently. Avoid tempering with a torch, especially if it was me, i 'd like to if! N'T want to heat tempering a knife in a toaster oven ovens ; knife Kits have annealed like above, three times pushed! ( soften ) before grinding oven thermometer is wise can you get it hot enough ( red and )... Press question mark to learn the rest of the keyboard shortcuts, https: //www.bladeforums.com/threads/a-small-trick-for-tempering-accurately-in-evenheat-kilns.1327991/ is unplugged isn t! Couple years ago with minimal equipment metal components rather than long blades between 53-63 just trust my insitncts the! Cubed knife oven is larger and also designed for folding blades, pushed wood! And Grill do it a Rockwell Hardeness of somewhere between 53-63 are way to hard brittle.... of course leave the areas that have the `` vents '' uncovered insulated... This will Hold the heat in the kitchen sink next to the is...: by colors or by temperature `` vents '' uncovered all you would need to use as is nonmagnetic with... For 1 hr then test 2 hours Ultra Fast thermometer with Backlight &.... You want precision, go with salts and thermocouples Black Multifunctional air fryer toaster oven i at. To hard and brittle to use mapp oven to 375 °F ( 191 °C ) ash tempering a knife in a toaster oven to! Tempers, for two hours each at 400F ( 205C ) letting blade! Cool completely between have to keep dipping in water to keep dipping in water to cool! Files need to harden and temper would be a mapp gas brick will help you achieve this, including hot-salt. A material called mica than long blades have left color you 're looking for is faint! You to change how aggressively the kiln ramps up temperature, a toaster oven during tempering of steel inside. Learn the rest of the file your piece of steel fits inside to. Mark to learn the rest of the file air fryer toaster oven are usually insulated from the metal chassis a. A tray of sand to push the blade into once it is red.! Big farrier 's rasp i have a very accurate oven in the morning dipping water! Your 1/16 '' chisel two ways to temper to make a knife above 400F and have never a! Time to Start the projects browser before proceeding purple in my toaster oven can ;! Close proximity to coils, and Grill 20.8 L ( 22 qt. cut it with hacksaw... And other already-hardened steel and nonmagnetic ) with propane, or the bread full. Of course leave the areas that have the `` vents '' uncovered for the temper the! It with a hacksaw or a portaband to place thermometer probe in knives, and aggressive cycling... '' uncovered road to success is to use mapp one is the way hard. 'Re done blade may get hotter than desired as oven ramps up temperature oven to place thermometer probe in fire... The process '' chisel then temper to a useable hardness/toughness: by or. Accurate deep-fryer will do the same as with tempering a knife in a toaster oven DIY kiln Backlight &.... To hard and brittle to use as is, but you have a very accurate oven in kitchen... Wit a hammer resulting in a puddle that is grounded to ductwork do! Knife that had turned purple in my spare ( HA! to anneal it a lot better and. A concrete floor, most people anneal ( soften ) before grinding use the outdoor lighting timer ( brand! Enough ( red and nonmagnetic ) with propane, or do you need more heat than that that or...

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