Letter Opener... Wait what????

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bfrd
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Letter Opener... Wait what????

Post by bfrd »

Since Scott posted it, I figured I would talk about it.

While I couldn't focus on models, I still needed to keep busy with something. So I tried my hand at working steel for the first time. I don't have a forge, so my first stop was Etsy for some materials. I picked up some Damascus steel blanks. If you aren't familiar with Damascus steel, it is simply two different types of steel with varying amounts of Carbon that are forge-welded together. The different amounts of carbon in the steel react to certain chemicals differently, causing the pattern created in the forge-welding process to show up. Check the link above for more details.

I decided on making letter openers so I wouldn't have to deal with heat treating the blades. Since this process required some prototyping, not all of the images are from the same knife.

The first thing I did was to create a pattern in Fusion360.

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Then I found a local shop that would cut the basic shape with a water jet, which was, surprisingly, much less expensive than I thought!

Once the basic shape was set, I used a belt grinder to profile the blade. The image below shows the raw blank from the water-jet cutting and a "mostly" profiled blade. I did a very light chemical etch to show the pattern.

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Many belts lost their lives in this process, along with a few pairs of gloves (the hot steel kept burning through them). Minimal blood was lost.

Much like models, preparation of the material is key—lots and lots of sanding was required to remove the larger scratches from grinding.

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The sanding completely removes the oxide layer which reveals the pattern. To etch the blades I used a 50% solution of Ferric Chloride. I just made a little tube out of PVC pipe and left the blades in for about 10 minutes in total. One type of steel is eaten away and the other layer's oxide coating is lightly sanded away.

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I used my laser cutter to prepare the wood for the knife scales.

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The ablation created by the laser caused the sap in the wood to get quite sticky, but oddly, it smelled really nice.


I used brass rods and 2-part epoxy to secure the scales to the blade.
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After that, the only thing to do is sand down the handles and apply Danish oil.
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This example used a two-part pin. The outer tube is brass and the inner rod is copper.

I made a simple box for Scott as well. I used my laser cutter and made two identical sets of letters. One was Maple, and the other was African Mahogany. I used a black CA glue to glue the letters onto the corresponding piece of wood to create a pseudo inlay.
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Re: Letter Opener... Wait what????

Post by digger303 »

Very clever, well executed and a nice thing to do. :clap: :clap: :cheers2:
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Re: Letter Opener... Wait what????

Post by Twokidsnosleep »

It is super awesome :banana:
My family was wanting to steal it!
I am gonna sharpen it up so I can stab anyone trying such thievery :mrgreen:

Ahh black Ca glue....will have to look for that
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Re: Letter Opener... Wait what????

Post by BigWall »

Very cool projects! Looks like the all came out very nicely!
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Re: Letter Opener... Wait what????

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Twokidsnosleep wrote: Fri Jan 08, 2021 5:03 pm It is super awesome :banana:
My family was wanting to steal it!
I am gonna sharpen it up so I can stab anyone trying such thievery :mrgreen:

Ahh black Ca glue....will have to look for that
Black pouring resin is good too. :th: :cheers2:
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Re: Letter Opener... Wait what????

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digger303 wrote: Sat Jan 09, 2021 4:02 am
Twokidsnosleep wrote: Fri Jan 08, 2021 5:03 pm It is super awesome :banana:
My family was wanting to steal it!
I am gonna sharpen it up so I can stab anyone trying such thievery :mrgreen:

Ahh black Ca glue....will have to look for that
Black pouring resin is good too. :th: :cheers2:
This box was actually my second try. I built the first one out of just birdseye maple but tried to use chamfered edges. I didn't have a small enough chamfer bit, so I used my Dremel with a sanding drum and hand file to make the chamfers. Needless to say, that didn't work out well. I now have a box for my small tools made out of very expensive wood. I did the cover differently as well. Instead of cutting out the letters completely, I used a lighter setting on the laser and only etched out about 1 mm. I then used resin to fill in. I used blue.

Image

I, unfortunately, forgot to send this one to Scott, so it is just sitting on my bench.
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Re: Letter Opener... Wait what????

Post by Twokidsnosleep »

I’ll come by and pick it up ;)
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Re: Letter Opener... Wait what????

Post by ForeverPlasticKits »

:thumb2: Very good job on the blades, specially the damask one! :thumb2:
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Re: Letter Opener... Wait what????

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Twokidsnosleep wrote: Mon Jan 11, 2021 3:22 pm I’ll come by and pick it up ;)
The people who say they'll come and never do :whistle: :shhh: :lol:
:th: :th: :cheers2:
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Re: Letter Opener... Wait what????

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digger303 wrote: Wed Jan 13, 2021 10:56 pm
Twokidsnosleep wrote: Mon Jan 11, 2021 3:22 pm I’ll come by and pick it up ;)
The people who say they'll come and never do :whistle: :shhh: :lol:
:th: :th: :cheers2:
He's scheduled to come out on September 31st. :lol:
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Re: Letter Opener... Wait what????

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bfrd wrote: Thu Jan 14, 2021 1:47 pm
digger303 wrote: Wed Jan 13, 2021 10:56 pm
Twokidsnosleep wrote: Mon Jan 11, 2021 3:22 pm I’ll come by and pick it up ;)
The people who say they'll come and never do :whistle: :shhh: :lol:
:th: :th: :cheers2:
He's scheduled to come out on September 31st. :lol:

Fortunately our shared border is still closed.
We are considering a hockey stick woven wall coast to coast
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Re: Letter Opener... Wait what????

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This one is NOT a letter opener.

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Re: Letter Opener... Wait what????

Post by Twokidsnosleep »

Cool
Knife goes in, guts come out
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Re: Letter Opener... Wait what????

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bfrd wrote: Thu Jan 14, 2021 11:19 pm This one is NOT a letter opener.

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Reminds me of the Japanese Tanto.
Very nice. :th: :th: :cheers2:
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Re: Letter Opener... Wait what????

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digger303 wrote: Fri Jan 15, 2021 5:04 am
bfrd wrote: Thu Jan 14, 2021 11:19 pm This one is NOT a letter opener.

Image

Image

Image
Reminds me of the Japanese Tanto.
Very nice. :th: :th: :cheers2:
There is a good reason for that! I didn't do a traditional Japanese handle though. For this one, I just ordered the blade already cut.

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Re: Letter Opener... Wait what????

Post by Twokidsnosleep »

bfrd wrote: Fri Jan 15, 2021 12:22 pm
digger303 wrote: Fri Jan 15, 2021 5:04 am
bfrd wrote: Thu Jan 14, 2021 11:19 pm This one is NOT a letter opener.

Image

Image

Image
Reminds me of the Japanese Tanto.
Very nice. :th: :th: :cheers2:
There is a good reason for that! I didn't do a traditional Japanese handle though. For this one, I just ordered the blade already cut.

Image
What is that Japanese knife designed to be used for??
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Re: Letter Opener... Wait what????

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Twokidsnosleep wrote: Sat Jan 16, 2021 6:33 pm
bfrd wrote: Fri Jan 15, 2021 12:22 pm
digger303 wrote: Fri Jan 15, 2021 5:04 am

Reminds me of the Japanese Tanto.
Very nice. :th: :th: :cheers2:
There is a good reason for that! I didn't do a traditional Japanese handle though. For this one, I just ordered the blade already cut.

Image
What is that Japanese knife designed to be used for??
I was going to be a smart A and say for slicing tomatoes, but decided I would be more helpful and generally nice :whistle: :nena:
Mostly Tanto were used as a stabbing weapon, but as it varied in size a little it could be also used as a short sword in a slashing fashion. Heavier versions were designed as armor piecing.
:th: :cheers2:

Ps...Smaller versions were used as a woman's self defense knife.
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Re: Letter Opener... Wait what????

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Two more finished and I have the last blade to go. Left side is Purpleheart and the right side is Bloodwood. I have no idea what I am going to do with them. Perhaps, a prize for one of the group builds?
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Re: Letter Opener... Wait what????

Post by Twokidsnosleep »

OR, if you don't finish your build...


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That is John Belushi on SNL, so nobody have a fit, just a joke
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