@Sammy-dz2hk
This video is criminally underrated, have an algorithm comment
@kenf4837
I've been a machinist for many years and have heard about sharpening files with acid, but didnt want to have acid around where the kids might get into it! Never thought about vinegar! Im going to try it! Thanks!
@unperrier
Thanks. One measurement that you could have done is to file a piece of metal with say 100 strokes and measure the weight of the filings (by weighing the piece before and after) Doing that for blunt and sharpened files would be a good indicator of how much they're actually sharper. Project Farm did that just yesterday about sharpening mower blades.
@charlescoker7752
When I was in the US Navy 50 years ago. We were taught to use chalk to keep the file from rusting. Worked great. You take the chalk and rub it into the teeth of the file. Totally filling up the file's teeth.
@nancycurtis7315
I use 100 grams of citric acid to 5 litres of water for restoring old tools. It works very well. A soak overnight and a brush off with a small scrubbing brush. Dry and spray with a lubricant. Been doing this for 5years. Greetings from Dimboola, in Victoria, Australia.
@Charlielizard
After all my college chemistry courses and oilfield work, sulfuric acid is something I keep away from. However, the vinegar method looks like it worked great; and inexpensive as well. Appreciate the video.
@MisterTee2010
Vinegar can be used for so many things. Especially on french fries 😁Thank you for sharing :hand-pink-waving:
@StreetMachine18
can confirm. i had a 5 gallon bucket filled with the finest walmart vinegar and i dumped all my garage sale finds into it. broken hammers, files, wrenches, etc. and they all came up aces!!! I recommend you try it at home.
@np70707
This is a great little video. I love the foundry content but I think you should do more videos like this as well. It's really such a shame that there are no American made files any more. Restoring old ones is the best we can get and I was really surprised how well the vinegar worked. I'll start hunting for files and restoring them since it worked so well.
@BrilliantDesignOnline
Super interesting. I did a railroad spike in vinegar and it helped; I have whole drawer full of files that now are going to get this treatment: Thank you.
@Serbianguy432
This video was very interesting, and as a guy who has, and uses, many files, I'll definitely be putting this in my bag of tricks for the future.
@vaultboy2270
While really interesting I would have loved some kind of metric test, i.e how long it takes to file down X amount of Y before and after. But great vid :)
@stefanmeyers2808
Thanks for the video it was nice to see the difference between sulfuric acid and vinegar. you didn't mention how the end of the file turned out that you purposefully dulled.
@grumpytuber
Really good video. I have a bunch of my Dad's old files and some of my newer ones I will try this on. Thank you.
@charlescoker7752
Found you can add the baking soda to the vinegar. It neutralizes the acid. But still removes the rust. You can leave the file in the mixture for as long as you want. And can reuse the mixture more times than the expensive Evapo Rust.
@thespacenoob4760
I'm impressed by how well it worked
@ChrisEbbrsen
Im an illustrator and need sharp files to sharpen drawing leads so this was reLly helpful thanks
@alanchapman6170
Phosphoric acid works well. Learned this many years ago ( 40+).
@GreasyLuckForge
Thanks for the video. I am always using files and looking for good old ones. I know you can have them sent out for sharpening, and I know they do it in some sort of acid, but I have never tried a test like you did. As others have commented, it would be nice to see a before and after comparison test of how they work. I may have to try that on my own. The white vinegar seemed to work well.
@robinson-foundry