My first knife, critique welcome

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Dec 9, 2003
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I just finished my first knife that I did all by myself, except for the heat treat.

It is 1/8th inch 440C that I sent off to Texas Knife Supply for heat treat. The angle is flat ground.
I made the kydex sheath too, I intended this to be a keychain knife. I also figured that it could be tied onto a stick or something in an emergency to make a spear.
Initially polished the knife but went to random orbit sander with i think 150 or 220 grit which gives a decent sort of stone wash.
I used my delta 1x42 inch sander, a drill press with various sanding and grinding attachments and files.

My inspiration was a present I had given my grandma a long time ago called a worry store. It is a small flat stone that you rub when you worry or something like that. Anywho the one i gave her had a shallow oval shaped area carved/hollowed out into it where your thumb goes.
One of the lessons I learned was that you can't really achieve that sort of thing without probably a mill. I had tried with various sanding and grinding attachments but quickly realized that it was not going to work, and it was not salvageable, so I just drill edit out and have a large hole for a finger or thumb to hold onto. Since the inner hole wasn't very big it was also hard to sand and shape the space I driller out but files made it not too bad.
I had a certain image in my head and on paper but multiple things ended up getting changed or added on in the final version. I suppose this is unavoidable on a new design? I could have spent a little more time working on making sure the scratches all came out though when going to smaller grits.
I also added the jimping to help with grip because the last thing I want is to slide forward and get cut since there is obviously not much handle to grab onto.
If I had to do it again I may have also opted for a flat angled edge instead of a curved edge for the same reason that I don't want to slide forward and get cut by the blade.
I have mixed feelings about the barb looking thing just behind the blade edge. I don't think they look good but it helps to keep from sliding forward on the blade.
The other trouble I had is that due to the thickness of the knife versus the closeness of the edge to the handle was that I kept having to grind farther and farther back to obtain a small enough angle. I used my spyderco sharpener to put the micro bevel at 20 degrees each side. So basically I did not account for the length I would need to go back to taper it to a small enough angle. This caused the grind line to go farther back on the knife than I had intended.
I also bought some metal cutting blades for my jigsaw so that I would have to drill a bunch of holes and cut with a hacksaw again... that was a time consuming task. It sure is a lot cheaper than buying a metal cutting band saw though.

So what do you guys think? Would people buy it? (I am not looking to start manufacturing or anything just hypothetical)

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How I hold the knife
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Hmmm very interesting design, I like it a lot. People love small EDC utility knives like this, I'm sure it would sell in a heartbeat (with some improved fit and finish of course ;)) You could offer it in a variety of finishes.. along with custom color kydex sheaths.

As for using a jigsaw with metal cutting blades... with the low low cost of porta-bands, I think you will find it more than pays for itself. I've had mine for only a few weeks, and its already saved on belts (i'm certain it would save you on jigsaw blades). Just a thought, maybe it's not in the budget now but it wouldn't be a bad idea!

Keep up the good work man, for your first knife it is a very innovative design can't wait to see more
 
it is nice. maybe making the blade portion a bit longer, but other than it looks cool. what are you thinking price wise?
 
it is nice. maybe making the blade portion a bit longer, but other than it looks cool. what are you thinking price wise?

I never really thought of a price, the first one always takes a lot longer so if i streamlined them who knows... 50 bucks or less sounds fair?
 
Sand it more with the orbital and get the straight grind lines out of the bevels. A bit more even on the filework would be nice. Maybe consider making it from Titanium.

I like it.
 
There are alot of people that go for those little utility type knives, I suggest another way to retain the knife in the sheath to make sure its not lost, a slight indent in the middle may work without making it too difficult to remove. I would also try cutting some common things that it may be used for to see if that bevel is good or needs to be extended to decrease the angle. Maybe some light cord, box, string, paper bag, seat belt?
 
There are alot of people that go for those little utility type knives, I suggest another way to retain the knife in the sheath to make sure its not lost, a slight indent in the middle may work without making it too difficult to remove. I would also try cutting some common things that it may be used for to see if that bevel is good or needs to be extended to decrease the angle. Maybe some light cord, box, string, paper bag, seat belt?

It is in the sheath pretty well, hard to remove. I was going to add a small lanyard 550 cord knot type of thing, but a little indentation is a good idea too! Currently the sheath holds on because the sheath bends inwards and holds where the space in the knife is.
So far the current angle seems to work, it shaves hair, cuts open boxes alright, fingernails lol. Haven't had anything really to use it on yet though.
 
A question:
After you heat treat a knife there is the gray color. Is all of this decarb? I know that if not sealed well in foil that the decarb can get thick and need a lot more work to grind off.
I was wondering if the thin layer of gray needs to be ground off or not? When I got the knife back from heat treat it was a very thin layer and came off easily but I was wondering if it could be left on for cosmetic reasons or something like that?
Also I did not do much to get the gray out of the grooves on the inside of the hole so I am hoping there won't be any side effects.
THanks
 
The gray color is an oxide reside and can be left on with no problems,except it is very thin and will wear through quickly and then the finish will start to look bad.
Stan
 
Cool design. Looks like a pain to cut out. Nice job!
 
There are alot of people that go for those little utility type knives, I suggest another way to retain the knife in the sheath to make sure its not lost, a slight indent in the middle may work without making it too difficult to remove. I would also try cutting some common things that it may be used for to see if that bevel is good or needs to be extended to decrease the angle. Maybe some light cord, box, string, paper bag, seat belt?

I think it has an indent in the middle. Also known as a hole... ;)
 
for what it is, and it being your first knife, i think you did awsome. its somthing that functional and you will always have it with you. I think you can clean it up a lot with just a bit of practice and some finer grit paper.

i would say just give it a little more blade if i were to make one like that.
 
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