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Q&A for How to Make a Knife
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QuestionCan I use a belt grinder instead?Community AnswerFor making a bevel and finishing the shape of the knife, yes. I wouldn't recommend using a belt grinder for making the rough outline of the knife.
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QuestionWhich other metal scrap items could be used to make a knife?Community AnswerLawn mower blades or the string shocks of trucks will work. Really any metal with a high amount of carbon will do.
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QuestionWhat is "heat treating" a knife?Community AnswerHeat treating a blade is the process of heating up the metal and then plunging the hot metal into a liquid. Peanut oil is a great choice.
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QuestionWould spring steel be good for my knife?Community AnswerSpring steel is great for knives, as it produces a long lasting sharp edge due to its higher carbon content. it must be heat treated for optimal results, though.
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QuestionWill tempered metal hold a sharp edge longer and be harder to resharpen?Luke RicheyCommunity AnswerIf the metal is tempered it will hold whatever kind of edge you can put on it. In my experience, most knives are easy to sharpen with a knife steel.
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QuestionDo you have to harden the blade?Community AnswerThe process of forging hardens the blade with a "quench", which involves heating the blade in the forge and plunging it in oil or water. So, yes, you need to harden the blade.
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QuestionCan I use a skill saw?Community AnswerYou could theoretically use one, but I wouldn't suggest it.
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QuestionCan I use brass for the knife?Community AnswerNo, brass is soft and will bend. Use a high carbon steel for better edge retention. You can use brass rods that are 2 - 6 mm thick instead of rivets, though.
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QuestionCan I use water to douse the knife?Community AnswerYes, but almost all oils contains carbon and the hot steal will pull more carbon into the steel. So more carbon better usable and stonger knife edge.
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QuestionI have a bunch of old metal files, most a foot long and two inches wide. Would these make great homemade knifes?Community AnswerThey would be awesome. In fact, as long as you are a careful not to overheat them when grinding them, the heat treat they already have should be sufficient. (You know you've gotten it too hot if it goes blue when grinding, this usually happens at the tip. Go slow and cool it with water periodically).
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QuestionHow do you get a nice shine on a blade?Community AnswerYou can get a mirror finish by sanding down to a 1000 grit, and then use a buffing wheel.
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