Barmaley's Aggregated Questions Thread

Discussion in 'Maintenance, Tinkering & Embellishment' started by Barmaley, Apr 21, 2020.

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  1. Barmaley

    Barmaley

    130
    Dec 31, 2016
    Mr. Wizard,

    Using hacksaw blades was my first move. I actually found 3 old hacksaws (all different brands) and I was thinking of using the whole saw (turning the blade in a saw at 90 degrees) in the shredding board since such application of saws could provide tension for the blades to keep them from sagging. I stuck when I figure out that I for some reason can not make the blades sharp. After I finished sharpening the edge cuts paper (to a degree) but does not cut cabbage:mad:. I think my problem was that I did the angle too sharp - about 14 degrees on one side only. No matter how hard I try the apex feels rough for the touch by a finger. I also was surprised how long did it take to sharpen it. First I took off 2/3 of the bevel with a bench grinder (I did not want to go close to the apex not to overheat it) and then I use my self-made machine to finish it up. It took me 15 minute of constant cutting using the cheapest coarse and medium water stone to get to burr. Then Arkansas stone and ceramic honing could not achieve desirable sharpness.
     
  2. Mr.Wizard

    Mr.Wizard

    Feb 28, 2015
    What kind of blades did you use? Most hacksaw blades now appear to be bi-metal, where a thin wire of hard cobalt tool steel is welded to the edge of a (mild?) steel strip. After the teeth are cut only the points are made of the cobalt tool steel, and the rest is softer metal.
     
  3. Barmaley

    Barmaley

    130
    Dec 31, 2016
    bucketstove, that was the funniest video I ever saw! But Why? Why when need to cut tomatoes with scissors???
    Do you know where can I buy those Galaxy knives? And the most important question: will they hold the edge?
     
  4. Barmaley

    Barmaley

    130
    Dec 31, 2016
    I don't know since the blade was old and paint was off. I know it suppose to be good quality! I may need to try cheaper blade.
     
  5. bucketstove

    bucketstove

    Sep 23, 2014
    For the same reason as make a knife out of fish or wood? :D

    Daiso japan , a dollar store (or $1.50)
    What is "hold an edge" to cabbage?

    dollar store knife is likely 420 steel
    better retention than
    304 which is like spoon / butterknife
    and according to internet
    cheese graters/zesters are made from 304 stainless
    see https://knifesteelnerds.com/2019/06/24/h1-steel-how-it-works/
     
  6. Barmaley

    Barmaley

    130
    Dec 31, 2016
    420 would work if I could find 4 pieces of 30cm x 30mm x 3mm. Are there any stores which sell them here in the USA?
     
  7. Tjstampa

    Tjstampa Gold Member Gold Member

    264
    Mar 25, 2019
    I thought Flitz was just a chemical polish and does not contain abrasives. I couldn’t find any reference on the package.
     
  8. willc

    willc Gold Member Gold Member

    Aug 13, 2013
    In addition to what Blues said some stones just work better when left soaking.
    The King 1000 , Suehiro Chemical 320, and my Naniwa Traditional 4K all work better after a long soak and since it doesn’t hurt them I usually keep them in a tub with clean water.
     
    Mr.Wizard and eveled like this.
  9. Barmaley

    Barmaley

    130
    Dec 31, 2016
    Hello guys,

    I just received a knife which I bought at Amazon for $14: https://www.amazon.com/Damascus-Kni...child=1&qid=1588907359&sr=8-1&srs=20640497011
    They say: 【Japanese 67 Layers VG-10 Stainless Damascus Steel】VG-10 – Made up of Carbon: .95 – 1.05%, Vanadium: .10 - .30%, Chromium: 16.10 – 18.50%, Molybdenum: .90 – 1.20%, Cobalt: 1.30 – 1.50%, Manganese: .50%, Phosphorus: .03% This is the most popular stainless steels amongst Japanese knife makers. While other damascus knifes only have fewer Chromium(14.05-16.50) and No Cobalt.

    It looks like it is a $14 knife in terms of hammered finish, handle workmanship and accuracy etc. However, the blade is really sharp for a factory sharpen knife. It cuts paper, shaves etc. I bought it out of curiosity because of the price. I also wanted a knife to practice my sharpen skills. But after testing the knife it is effeminately cuts better than anything that I have, so I feel some reservation to practice on it before it gets dull. Nevertheless, my question is about posibility of it to be VG10. I guess no way it can be VG10 since material should be more then the price if we count the handle, the box it came in, the shipment, fees etc. If you look at the amazon picture at the link above you may see that the lines from suppose layers of steel look too ornamental. Bottom line: does it look like VG10?
     
    Danke42 likes this.
  10. Mr.Wizard

    Mr.Wizard

    Feb 28, 2015
    I cannot find this stone. Do you have a product number?
     
    willc likes this.
  11. Tjstampa

    Tjstampa Gold Member Gold Member

    264
    Mar 25, 2019
    @Mr.Wizard that was a good read and makes since.
     
  12. Ourorboros

    Ourorboros

    413
    Jan 23, 2017
    You really can't tell by looking. You can get just about any finish you want on a steel.
    A Shun VG-10, Kato VG-10, & Kurosaki VG-10 don't look that similar. You might find a Blue Super with the same finish as a Kurosaki.
    And really a lot comes down to the heat treatment.
     
    Mr.Wizard likes this.
  13. MolokaiRider

    MolokaiRider Gold Member Gold Member

    Sep 13, 2017
    Hard to tell without buying it and sending it to a lab that can verify it’s makeup.

    I recommend purchasing from a reputable knife dealer other than Amazon, and from a known maker: The odds of the knife being what it is advertised as goes up exponentially.
     
  14. Barmaley

    Barmaley

    130
    Dec 31, 2016
    Actually I looked at the venture as a fun project. Considering the close to zero price I had trepidation to see what will happen. I was surprised how well the knife was sharpened. I really enjoy cutting tomatoes and chopping herbs with it.

    I got another knife from a no brand USA maker (I personally spoke to the owner over the phone) whose VG10 santoku served well me over the last 2 or 3 years. The pattern there was way different and not as curvy as this knife. Are there signs how to spot real or fake VG10?
     
  15. CasePeanut

    CasePeanut Gold Member Gold Member

    512
    May 25, 2018
    Can you add a tiny drop of bleach to keep mildew away?
     
  16. DaveDM

    DaveDM

    91
    Dec 21, 2017
    I think these have been taken from top of the edge not sideways like previous shots.
     
  17. willc

    willc Gold Member Gold Member

    Aug 13, 2013
    Sorry it is a 6K in the traditional line but I have soaked my 4K Naniwa Hayabusa and that helped with loading.
    The 6K Traditional they have at sharpening supplies.

    Also have soaked an old Suehiro 6K with a wooden base which is a peculiar stone as it sometimes works wonderfully and other times I want to toss it.
     
    Mr.Wizard likes this.
  18. For $14, I'd just assume it's likely not VG10 and use it, sharpen it and make the most of what you've got. As mentioned previously, if the heat treat isn't very good, it renders the steel type essentially moot anyway. There's also the possibility of impurities in the steel (for $14, I'd almost expect the steel to be less pure). And those impurities could also render the heat treat essentially moot as well. Even genuine VG10 shows a lot of variation in performance, depending on how it was hardened and tempered.

    Down the road, after you've used it and sharpened it multiple times, you might still be pleasantly surprised with what you got for $14. That's the beauty of an inexpensive knife - there's little to lose and even less to worry about, no matter how it turns out.
     
    Diemaker likes this.
  19. Mr.Wizard

    Mr.Wizard

    Feb 28, 2015
    The Hayabusa is my only finishing bench stone and I have been treating it as a splash-and-go. You haven't seen any cracking/crazing problems on the Hayabusa with extended soaking?
     

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