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Tuna Drop Blood Knives

Old 03-16-2021, 10:51 AM
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Default Tuna Drop Blood Knives

I am looking at making some Tuna Drop Blood Knives and wanted some input on what people would be interested in. These are designed to quickly bleed out a tuna without damaging excessive meat. I am looking at 3 versions:

1. Cheapest version, replaceable/resharpenable blade, cross guard and simple wood dowel handle (using hardwoods like maple) with an oil finish. It would be a double edged blade on these. I should have a prototype done up this week or weekend hopefully. Cost would be $50. These would be fairly quick/straightforward builds and I can do several at a time to have some on hand if people want them quickly. They would be functional, but not super pretty. They would be comparable to the factory available knives, but with a replaceable blade that is readily available.

2. Using a preexisting blank, making a tuna drop blood knife with a Micarta or G10 handle. There are 2 blade designs I can get blanks for that would work for this. One is a doubled edged blade, the other is a kiridashi (slanted blade). These would be $80 with the micarta/G10 basic handle. They would take a little longer to make since the handle is a different shape and required more work and more material cost than the first option and I would have to get the blade/handle materials in stock. I am hoping to get 1 prototype of each blade done hopefully this weekend. The handle would be more comfortable than a dowel handle like the first option and have color options.

3. Full custom. These would start at $90 for a Micarta/G10 handle and guard. I would do the Kiridashi blade (chisel ground, single bevel) on these (top one in the attached pic) and a slightly different handle that is more conducive for more efficient construction. They would take longer since I would be buying steel barstock, grinding to to shape, sending out for heat treating, then grinding/polishing and then attaching the handle. These have a lot more time/work involved in them and have to be sent out for heat treating, so the lead time is much longer. I would use basic (440C, AEB-L or Nitro V) stainless steels that are easy to touch up and have good corrosion resistance. I don't see the need to pay a premium for super steels like S30V, CPM154, etc for this type of knife as edge holding isn't as much of a concern for the useage for this knife and they are much more expensive cost wise to make.

The top one is like what Option 3 would be for $90. Micarta handle, guard and the blade. The bottom one is an oyster blank I reground completely and did a handle for. Option 2 would be similar, but would use a different blank and possibly a different guard configuration.


Old 03-16-2021, 03:00 PM
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Prototype for the $50 version. Need to get some better dowels, will probably use a stain and spar urethane for the finish.
Old 03-16-2021, 04:16 PM
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I once made a weapon like that when I was in prison. It served me well.

Old 03-16-2021, 05:53 PM
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Originally Posted by John_Madison CT View Post
I once made a weapon like that when I was in prison. It served me well.
I won't ask where you kept it hidden.
Old 03-16-2021, 06:10 PM
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If it worked in prison, it should work on a tuna!

This is the double edge pre made blank I can get. There is a kiridashi blank as well but I am not sure how well the kiridashi style would work after talking to some people even though I did see some drop blood knives with that shape.


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Old 03-21-2021, 05:03 AM
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Tuna Shiv is now available! 7 up for grabs, one is spoken for already! Replaceable and resharpenable broadhead, indexable guard, red oak handle stained and Tung Oil finished! $55 shipped CONUS or $50 pick up in CT.

The Tuna Poker model will be done today, it will be the double edged pre made blank and is already spoken for.
Old 03-21-2021, 11:12 AM
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5 Tuna Shivs left! Tuna Pokers are in process now!
Old 03-21-2021, 12:05 PM
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pardon my ignorance, I've only caught tuna once, and we didn't use anything like this to bleed them, where do you "shank" 'em at?
Old 03-21-2021, 02:07 PM
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I believe it is along the lateral line on the side of the tuna, behind/under the pectoral fin. You only need to go in like half an inch or so from what I have seen.

Tuna Pokers! 440C premade blanks. These have brown Micarta guards, camo micarta handles and a natural micarta spacer. $85 shipped CONUS for the top one (Kiridashi style), bottom one (Double edged) is sold to a member here.



Old 03-23-2021, 03:01 PM
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Is that just a deer broadhead on a stick?
Old 03-23-2021, 03:06 PM
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For the Tuna Shivs, yes. Most factory made ones are a simple blade on a plain wood handle, but are out of stock at most places, so I figured out a way to make these up fairly quickly and inexpensively for people if they are looking for one. Red oak dowel, long archery point insert in brass epoxied into the handle with a Micarta or g10 guard and the broadhead. This way the blade is replaceable and re sharpen able as needed. Simple and no frills for right around the same price as the factory ones.
Old 03-31-2021, 07:54 AM
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Bump, Tuna Shivs are still available and the one kiridashi Tuna Poker.
Old 04-20-2021, 06:08 AM
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5 of the Tuna Shivs are left ($55 each shipped CONUS) and one Kiridashi Tuna Poker ($85 shipped CONUS)!
Old 05-12-2021, 05:17 AM
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5 Tuna Shivs and one Tuna Poker left!

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