Large hook design thoughts
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So I'm looking to fabricate a large hook. There are a lack of large hooks on the market. Fish and vermin aren't producing so I'd like to take a stab at it. I have two designs I'm thinking of. Haven't gotten serious yet but you have to start somewhere. I have access to a machine shop for fabricating and a kiln for heat treating. My trouble is with steel plate. I have no experience bending or forming plate. So here's my first design which assumes I can find elliptical steel tubing. If not, I have another design I'm looking into. |
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I'd be interested. |
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Have you looked into making a custom bending brake? This would give you many more geometry options and allow the use of flat stock. If you can get the steel past critical it should bend fairly easily. Then normalize and heat treat. |
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Nice plan. I've worked with metal quite a bit in the past. I think that even with a vice, cutting a tube that's not round(and 1/8" thick) on the angle you've shown would be quite a task without a proper jig. Looks like your on the right track though. I'd be interested in one if your selling them at some point. |
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I'm fascinated. |
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Seems thin. One of the nice things about the big burly Fish hooks is that they feel bomber to leave for pro on top of large flakes that otherwise aren't protectable. That is one of the main reasons for extra large hooks in my mind. |
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Ryan, |
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Dobson wrote:Have you looked into making a custom bending brake? This would give you many more geometry options and allow the use of flat stock. If you can get the steel past critical it should bend fairly easily. Then normalize and heat treat. I wonder if 6AL4V would be strong enough. It would be much lighter, and is easy to form.Dobson, I have not looked into producing a brake yet. I have a tube bender for making offload roll cages and tube bumpers but I'm still trying to see if I can adapt it to use with plate. Until then I'm looking at easier fab methods that use conventional tools found in my garage that anyone can buy at their local hardware store (like a press, angle grinder, welder, and chop saw). |
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I would be interested. Looks like a neat project! |
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God do isometeric views burn the eyes, and shame on you for leaving out units. That being said my quick perspective thumbnail of the hook is off :P |
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NorCalNomad, |
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I was just looking into heat treating 10XX series steel and it is trash as you mentioned. Seems like the carbon content is too low to create any real hardening effect. |
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Russ Walling wrote:Looks like a neat project. Couple of thoughts: Use 4130 and not any 10xx style steel. Case hardening is fun and all but when used on a 10xx steel the results are unpredictable when the hook is under load. I tried this early on and the hooks would literally explode instead of flexing. Not a good thing. If you have access to all this stuff, make up your time and money by buying 4130 strip and gong from there with a bending jig. Heat treat is a bit like voodoo. Have a Rockwell rig on standby. The old FISH Hooks were rated to something like 3000lbs. I have hauled off them and used them as an important part of the anchor. No worries. We have some large (2" +/- ) RingAngle claws that are currently available. I don't have a pic on me (out of the office right now) but will send a link later today. These are not as strong as the real FISH Hook, but have a nice nostalgic feel to them and work great.Russ, Any idea why the initial Fish hooks were discontinued? No plans to make another run? |
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randy88fj62 wrote:I was just looking into heat treating 10XX series steel and it is trash as you mentioned. Seems like the carbon content is too low to create any real hardening effect. I will going with a 4XXX series steel if needed but I'm still exploring other options that could potentially provide the same strength requirements but have a higher ductility in its base form to make the initial cutting and forming easier.What about the eutectic and hyper-eutectic 10xx series steels? They can get plenty hard for almost any application. If scale is an issue with your furnace, use stainless foil. Russ is right about heat treatment being touchy. Professional heat treatment isn't expensive, and a good heat treater is a valuable source for advice. I usually pay between $4-$20 per blade depending on quantity and alloy. It would be cool to see how strong a hook in marquenched 52100 would be. The bainite structure should be ideal for this application. |
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Russ Walling wrote: Here are the current rigs we are sorta selling. They are not on our site yet, but when people ask about big hooks I offer these up.How much do they run for? Are they for sale? |
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Russ, |
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Russ' ring hooks are working well for me, have had them for several months now. Old school cool and stable. |
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Russ Walling wrote:I don't think the PM thing works for me. Email me. Russ@fishproducts.comemail sent. |
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Russ, |
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Nice ring angle hook! Old school works. |