Knifemaker Restore An Italian Chef's Knife Worth 1€
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I always love to mess around with old knives I find at flea markets.. I found this in a "All 1€" bucket. Is there anything better than "All 1€" buckets by the way?!
The thing I love the most is that these old blades have so much charater and odd features.. Take this one! The steel is so old you can see many impurities after the etch, just like in damascus steel! And it has been differentially heat treated, meaning that the edge is super hard (between 55 and 60 Rhc) while the spine is still very soft thanks to the edge quench it must have been used for this blade back when it was heat treated.
Furthermore, having to deal with so many materials limitations really makes each project of this kind unique in some way or another, and I like that a lot!
In this case I decided to go for a double brass bolster, inspired by old folding knives, and the separation between brass and wood is done at a 45° angle for extra fanciness! Jokes aside, I wanted to try this as a technique challenge. I don't really have precision tools or machine to make this fit reliably, so I wanted to try doing it all by eye with just the belt grinder and a "v" block as 45° reference. I have to admit I am surprised by the fit! It's not 100% perfect but pretty damn close. Better than I expected anyway!
And thanks to the brass pin in the bolster and the angle between those the wood in between is held in place just by one singe pin, no glue at all! That's something you probably don't want to see in a chef's knife as water can infiltrate, but I'll keep this one for me and I'm happy to have it all fit without glue just for the fun of it.
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Here are some of the videos where I go in more details about tecniques and tools used in this video:
Stabilizing wood: https://youtu.be/E-P3KWctkk0
Vacuum pump and chamber used to stabilize: https://youtu.be/BeiW_37rS-U
Homemade mosaic pins: https://youtu.be/v1g8bygXEgY
Tempering oven: https://youtu.be/uILynSeLuzU
My lovely drill press: https://youtu.be/BZmqVw7MJsg
My lovely buffer: https://youtu.be/8V9f0DIkb90
Index of operation and materials:
0:50 Electrolysis: water and sodium carbonate solution, parts connected to negative side and steel sacrificial anodes to positive sice of a DC power supply (car battery charger). 2-3 hrs at 5amp.
3:44 Refine shape and grinding new bevels on 2x72 belt grinder, edge kept cool with water bucket
4:43 Hand sand to 600grit sandpaper
5:09 Etch in ferric chloride
5:30 Satin finish with fine steel whool
6:01 Check moisture content before stabilizing, see video above for more info
6:59 Pull vacuum! Again, see the dedicated video for more info
7:52 Stabilizing resin cure
8:12 Mosaic pins, detailed video linked above
9:55 Center punch rivet holes
10:25 Reclaimed brass flat stock to use as bolster cut on the metal cutting band saw
10:50 Drill rivet holes with ca glue used instead of clamps
11:50 Mark excess material to grind off
12:20 Grind the 45° bevel with a v block as support
12:52 Step for the rivet to fill
13:17 Rivet the bolsters with brass round stock and ball peen hammer
13:56 Center hole for the mosaic pin
14:10 Cut wood inserts to rough size
14:24 Grind matching 45° bevels
14:51 Match drill pin hole
15:40 Hand sand up to 1200 grit
16:08 Buff with fine polishing compound
16:35 Boiled linseed oil as finish
16:45 Sharpen with MadEdge sharpener
17:06 Strop on leather with fine polishing coumpound
Thanks a lot for watching, I hope you liked the video!
Suggestions and comments are welcome.
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