Showing posts with label steel. Show all posts
Showing posts with label steel. Show all posts

Saturday, July 5, 2014

Illuminated Tools: Getting Started

First I did 1:1 sketches of the tools.

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These aren't exact blueprints, just scaled examples of where the project is headed.

Since I've had a hard time finding high carbon steel in my area I used a local metal reseller for most of my steel. She had some nice new 4340 available in bars for $1.50/lb, so I cut that into coupons and tacked them together without any fill rod, and forge welded it into one block.

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My first "forge" was a stack of fire bricks that I pointed my O/A torch into, I have since built a more respectable forge.

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I built this small press to help with forging and forge welding, it uses a 20 ton air-over-hydraulic cylinder. It's a bit slow and I'll definitely build a better one when funds allow.

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For the wrench I used a car coil spring, straightened and upset on one end. I used an air chisel to cut a slit in the upset, then opened it and wrapped it around a rod (sorry, no pics). Then I filed the open box by hand to fit a 3/4" bolt.

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Then I forged a taper on the other end and cut 1/4"-20 threads, this is how the handle will be affixed.

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Thursday, September 5, 2013

Seven Day Knife Project- Finale!

I placed all the knives on one decorative placard, the response at school was generally positive.

Wednesday, August 28, 2013

Seven Day Knife Project-Day VI & VII

Finished a middle-eastern style knife with a highly curved blade, and a dagger with a needlepoint blade. Both have stained birch handles with brass pins.



Tuesday, August 27, 2013

Seven Day Knife Project- Day V

Today's knife, in keeping with the recent (and necessary) quick and dirty blade construction, is styled after a prison-fashioned weapon, colloquially called a "shank" or "shiv." It is made from an old wood chisel, exactly the kind of object an inmate might have access to.


Sunday, August 25, 2013

Saturday, August 24, 2013

Seven Day Knife Project- Day II

 My previous every day knife was a Kershaw 1670TBLKST with SpeedsafeTM spring assist. I love having spring assist, unfortunately the blade was less than high quality, the tip bent and broke while folded in my pocket. So I used the same high carbon mystery steel from before to make myself a new blade.*

I started by covering the original blade with masking tape and outlining the space available inside the handle.



Then I drew the new blade shape on the tape, cut off the remainder, and traced it onto the steel and cut it out.


Next I had to make the new blade work with the old handle, this meant grinding and hand filing the two to be identical.




One problem I was having was in locating the detent on the new blade. I didn't want to drill through the hardened steel to transfer the mark through, and I don't have any precision measuring tools to aid me. 


After some contemplation, I noticed that the detent had worn a line into the paint of the blade, and after repeatedly testing the swing of the new blade a similar line had been left on it. So I simply punched a deep divot at the end of that line and it seems to work perfectly.


You can see that I changed the blade length and profile, and added a flapper to help open it with a thumb-stud.



My grind is nowhere near as good as the original unfortunately, but once I get better I can make redo it or make another one. That's the beauty of having these kinds of skills: you're never stuck with something inferior if you're always improving your craft.





*Kershaw's warranty position is that if your blade breaks, you broke it, and it is not covered by warranty. They will replace and sharpen blades with new stock for a fee of $10. For them to be able to cover the blade and labor for only $10 there's nothing telling me that I'll get any better product than I had before, and another chipped blade will be only a matter of time.

Friday, August 23, 2013

The Seven Day Knife Project

I've recently become very interested in knife making. I've been collecting knives since I was a tween and now I want to make my own. Pursuant to this goal, and for a school project about ritual and artifact, I've decided to make one knife a day for one week. I will attempt different styles and techniques, and not work on them again once the day is up. This will be difficult not only because I've never made a knife but also because school is in session and I have plenty of homework already.

Regardless, here is my first knife build:


I wanted to start by setting up real quench tanks, no more plastic bottles of water. I've had this medical oxygen cylinder kicking around for years, so I cut it in half. 


I wanted to use both halves but the top (valve) side didn't like to stand up, so I whipped up a quick and easy stand.


One half will hold water and the other will hold oil, both for quenching hot metals.

Starting with a piece of mystery steel from my pile (not the best way to start, but it was Friday afternoon and I wasn't going to go on a high-carbon hunt) I made the length about the same as my current pocket knife.


I sketched my first idea with soapstone onto the cleaned metal and rough-cut it with a cut-off wheel.



Then I smoothed the lines and started grinding the edge.This took a while.



When the edge was nearly done I heated the blade and quenched it in oil


New quench tank.

After finish-grinding the blade I used some wood I had lying around (pine? again, not the best start, oh well) to make the handle sides.



And used high-strength epoxy to attach them. Next time I will probably use brass pins as well.


Once the epoxy had set up I sanded the wood down into a nice grip-able handle.



Again, this was my very first try at making a knife, I have a long way to go still.



Another new thing I'm trying is time lapse photography of my work sessions, I cherry picked from the 400+ photos from today the ones that I thought were cool and in which I don't look too flabby.



Hipster safety goggles.