Since the piece was square-shaped, I cut the corners off of what would be the round end.Īfter cutting out the a piece of banding roughly the size of the spring, it was time to add the hole. Then I “rough cut” the width of the spring. I started by cutting a section of material to the length of the old spring. For “roughing out” the basic shape I used a set of hand shears (aka tinsnips). It’s sort of tear-dropped in shape with a hole and has a radius bent on one side going longways. So I had a pattern to make the new spring. I used the original spring, carefully pieced back together, to mark out how big of a piece to cut out of the banding.įortunately, the old, broken spring was still in the revolver (trying to make a new spring without having a “sample” to recreate is a bit more challenging, but still possible). You just have to do the work to determine if the particular material is suitable. For my fellow cheapskates out there, left over steel banding can often be had for nothing in places that receive a lot of freight. Some of this is actually pretty good spring steel, but by no means all. One source of material I use is steel banding material from freight shipments. The gunsmith supply houses like Brownell’s stock suitable material in different thicknesses and sizes. Spring steel is available from a variety of different sources. It’s easier to accomplish tempering the spring using a lead pot, like what you use for casting bullets (don’t worry it won’t affect your next round of casting). For tempering the spring you can use the same heat source, but it’ll be difficult to avoid overheating the spring. I use a MAPP torch for this task, but you could probably use a propane torch (or even a campfire if you’re really desperate). You’ll need a heat source and some oil to harden the spring. The spring I’m making for this project is fairly simple, but the same techniques work with more complex springs. You need the appropriate tools to shape the steel into whatever spring you’re trying to reproduce. Obviously, you need some suitable spring steel from which to make your spring. You don’t need a whole lot of equipment to make flat springs. Some metal banding can make excellent spring material. I’m going to make this spring to illustrate the techniques for making flat springs. The trigger spring was broken, preventing the trigger from properly resetting. The particular project I’m working on here is the repair of an old Iver Johnson top break revolver. But they’re very common in older guns-which are often the subjects of our repair or restoration projects. They’re not used so often in newer designs.
#Iver johnson top break trigger return spring how to#
Today, I’m going to demonstrate how to make some of the harder springs to find: flat springs.įlat springs used to be used very frequently in firearm design. When that happens, we’re left with a couple of choices: shelf the project until one turns up or make the spring ourselves.
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