i bought a hard use knife. and used it.

Discussion in 'The Kitchen Knife' started by inferno, May 18, 2019.

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  1. May 18, 2019 #1

    inferno

    inferno

    inferno

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    so i got a cheap, 100€, beginner deba from cleancut today. hand picked it... a beefy fukr. premium aus8 steel i think, lamianted with even more premium kitchen sink SS. i figured i have never had a full size deba, so i think i needed one. so i got one.

    https://www.cleancut.se/butik/knivmodeller/deba/deba-2-detail

    i wondered how i could test its quality somehow. then i figured i'd do some kind of stress test. i mean, what could possibly go wrong here?

    sharpened it up to 3k on a glass stone, took maybe 5 minutes. i think the angle was quite severe. must have been 40-45deg from the factory. i just followed that.

    then i subjected it to the "beer can test". turned out this was in fact the dura-marathon beer can test the deba had signed up for :)

    deba1.JPG

    the actual test... i used my hard use knife. sufficiently hard.

    this is how it looks after one chop. but i didnt really stop there if you know what i mean.
    deba2.JPG

    sometime the knife stuck very deep, in a funny way. that was worth documenting.

    deba3.JPG

    another angle

    deba4.JPG

    sometimes you get lucky.
    deba5.JPG
    other side of that.
    deba6.JPG

    I guess this the equivalent of a hole in one. i split the can in half in one chop. this was like the 5th can or so :)
    still going strong obviously.

    deba7.JPG

    I got lucky here.
    deba8.JPG
    results!

    deba9.JPG
     

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  2. May 18, 2019 #2

    inferno

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    lets have a look at the edge. sure this was 40-45 deg or so. so its not really a laser here obviously. but i think it performed above expectations.

    the biggest chip is 2x1mm and basically thats nothing. i sharpen my coworkers knives that are worse than this. and now i'm starting to wonder *** they actually do with their knives. it must be worse than this obviously.


    deba10.JPG
     
  3. May 18, 2019 #3

    stringer

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    Now that's a durability test. Well done. Let us know how the resharpen goes.
     
  4. May 18, 2019 #4

    inferno

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    also all the chips seems the be quite ductile fractures. aus8 is actually quite good steel imo.
     
  5. May 18, 2019 #5

    inferno

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    i promised my coworker i was gonna time it. He thinks an hour. i think 10 minutes. based on how quickly it went on the 3k glass to get it up to speed.
     
  6. May 18, 2019 #6

    daizee

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    Fun!
    Inferno, does that have a flat or hollow back side?
     
  7. May 18, 2019 #7

    inferno

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    its hollow like all real debas.
     
  8. May 18, 2019 #8

    inferno

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    also the actual finish on the blade was like 7/10. quite good for being almost free/very cheap.

    the handle have a plastic ferrule an some red/brown wood that i will be replacing obviously. but its not gonna be elaborate this time (for those that have seem my other handles) plain jane 1 or 2 wood. as simple as possible. and most likely regular ash, since i have that, that i got for free. and then maybe, maybe, a slight thin bolster of some darker wood. maybe.

    the actual edge was not that good though. sure it would cut food and all that. and was quite evenly ground. it took me maybe 5 minutes on a 3k stone to get it good all over, both sides. and obviously the back side is only supposed to be flat flat flat!! but i spent 5 minutes and a magic marker to spot where the edge actually was. sharpened up nicely. not gummy on my stone.

    but the factory edge was abut a 500-1k or so. not really up to your standards here really. but then again. i never use a factory edge. i have about 30 stones. so why should i? i simply dont. and i feel it would cut more beer cans with my 3k edge than the factory one so that was it.
     
  9. May 18, 2019 #9

    inferno

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    I'm also now in possession of an akifusa in srs15 that i am somehow willing to sacrifice for the cause of semiscientific science.
     
  10. May 18, 2019 #10

    daizee

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    I see - couldn't tell from the pix.

    I've read that some deba's are sharpened more obtuse near the back. What's your preferred geometry for a deba?
     
  11. May 18, 2019 #11

    inferno

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    I have no preference for a deba. its my first one.

    but a deba should be flat/straight on the front, on the actual bevel, then a microbevel, and on the back the spine and edge should only be the only thing abraded when laid flat on the stone. and this one is like that. the back side should be an arc.

    its a real deba. a cheap one. if you look at the pics you will see how its ground on the back side. I ground the back side on a 3k stone. for like 1 minute. only for deburring the front sharpening though. the back side is done correctly i think.
     
  12. May 18, 2019 #12

    inferno

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    I feel its was the same front side angle all over pretty much, no difference front to back in general, nothing i could detect on the stones. but i only spent like 1 minute on the actual wide bevel of the front. i concentrated on the microbevel. the "microbevel" though was quite severe in size and was not that micro.
     
  13. May 18, 2019 #13

    Gjackson98

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    Nice write up! Fun fun
     
  14. May 18, 2019 #14

    CoteRotie

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    Nice Doepfer modular synth too!
     
  15. May 19, 2019 at 6:33 AM #15

    Carl Kotte

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    This was an odd test. But it has a nice viking brute force feel to it. Can I ask: what did the test reveal? Are there any data to compare with? How many beer cans does a nice Gyuto, for example, thrash before it gives up?
     
  16. May 19, 2019 at 8:53 AM #16
    You should follow up with a 2x4” , some rolling tennis balls and a hanging rope o_O
     
  17. May 19, 2019 at 10:44 AM #17

    TB_London

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    Or maybe some fish....
     
  18. May 19, 2019 at 11:32 AM #18

    Carl Kotte

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    Maybe that would be too relevant somehow?
     
  19. May 19, 2019 at 12:42 PM #19

    Larrin

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    That’s a lot more damage than I expected on such a heavy blade.
     
  20. May 19, 2019 at 6:16 PM #20

    chinacats

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    Yikes on that Spicy White! Crazy steel or crazy heat treat?
     
  21. May 19, 2019 at 7:43 PM #21

    inferno

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    kinda like this?? :)
     
  22. May 19, 2019 at 7:57 PM #22
  23. May 19, 2019 at 8:00 PM #23

    inferno

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    it wasn't that bad actually. seems like it bent before it chipped. biggest chip was 1x2mm.

    deba11.JPG
     
  24. May 19, 2019 at 8:07 PM #24

    inferno

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    i did the actual edge "repair" today. took about 1,5h on a shapton pro 220 :)
    could have gone faster if i didn't try to spread the wear evenly over the stone.
    also trying to keep the profile the same as factory took some extra time.

    tomorrow i will do the glass 500, chosera 800 then i'm thinking the kitayama 4k and then its done. i'm gussing it will take maybe as little as 10 minutes now then all the heavy lifting is done.
     
  25. May 19, 2019 at 8:12 PM #25

    inferno

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    none of the above.
    he is simply cutting some mild steel can. I do similar stuff with my moras at work some times. thats not a really hard to do with most thin knives.
     

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