Bent/Warped Nakiri? Thoughts?

Discussion in 'The Kitchen Knife' started by JasonG, Nov 19, 2019.

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  1. Nov 19, 2019 #1

    JasonG

    JasonG

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    Hi All,

    I recently purchased a Watanabe Pro 180mm Nakiri. It looks to me like it is somewhat bent/warped when looking down the spine. When looking at the edge it is harder to tell. I reached out to Watanabe and he says this is normal for Kurouchi finish and isn’t a problem. I am concerned that over time as I sharpen more and more I’m going to run into the warped section. Thoughts? Pics below... upload_2019-11-19_14-27-27.jpeg upload_2019-11-19_14-27-46.jpeg upload_2019-11-19_14-28-26.jpeg upload_2019-11-19_14-28-46.jpeg upload_2019-11-19_14-29-16.jpeg upload_2019-11-19_14-29-37.jpeg upload_2019-11-19_14-29-57.jpeg upload_2019-11-19_14-30-32.jpeg
     
  2. Nov 19, 2019 #2
    Hi Jason, welcome to the forums. I am moving this to a different subforum.
     
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  3. Nov 19, 2019 #3

    Corradobrit1

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    Is the edge also warped? For me this seems rather extreme even if it only affects the spine. I would not be happy.
     
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  4. Nov 19, 2019 #4

    ian

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    That's worse than any knife I've owned. You may be able to bend it back a bit by hand... I've done that on san mai knives with less extreme tip bends. But I don't have any experience with curvature that extreme.
     
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  5. Nov 19, 2019 #5

    JBroida

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    Yes... i would be curious about the edge too
     
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  6. Nov 19, 2019 #6

    jimmy_d

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    I've bent back a warped nakiri, but that being said, I would not be happy if I purchased that from a vendor and they told me it was normal...
     
  7. Nov 19, 2019 #7

    CiderBear

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    Yikes, that does not look normal. I wouldn't be happy with it either
     
  8. Nov 19, 2019 #8

    slickmamba

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    I would ask them for a replacement.

    edit: especially with the handle upgrade, you should be happy with the product
     
    Last edited: Nov 19, 2019
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  9. Nov 20, 2019 #9

    bahamaroot

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    Welcome to the forum Jason.

    Too extreme for me, I'd be sending it back.
     
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  10. Nov 20, 2019 #10

    Corradobrit1

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    I think this is whats called an S grind.;)
     
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  11. Nov 20, 2019 #11

    CEH1

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    That thing is jacked up. My Wat 180 is arrow straight. Send it back.
     
  12. Nov 20, 2019 #12

    GLE1952

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    My way pro 180 is totally straight
     
  13. Nov 20, 2019 #13

    inferno

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    send it back.

    straightening it will probably involve putting it in the oven and putting a negative bend on it with clamps.
     
  14. Nov 20, 2019 #14

    madelinez

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    Wow bit of a disappointing response from Watanabe.
     
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  15. Nov 20, 2019 #15

    Michi

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    To me, that's way more than a normal manufacturing variation. I'd insist on a replacement.
     
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  16. Nov 20, 2019 #16

    wind88

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    I’d imagine people would go banana over this if it was a TF
     
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  17. Nov 20, 2019 #17

    lemeneid

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    That definitely needs to be changed. TBH it looks more like its almost u shaped.
     
  18. Nov 20, 2019 #18

    ian

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    Did you send Watanabe the picture, too?
     
  19. Nov 20, 2019 #19

    JasonG

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    Hi All,

    Thanks for the quick responses. What is the best way to take pictures that show edge straightness. I found this hard to determine even by sight let alone to photograph it.
    I have included the email from me to Watanabe(which included all pictures shown in my previous post). I also have included his email back to me.
    I’m glad to hear I’m not the only one that was surprised by this. My first reaction was to trust Watanabe’s response given his reputation, especially on this forum.
    Thank you all for your help.

    upload_2019-11-20_10-12-24.jpeg
    upload_2019-11-20_10-13-37.png
     
  20. Nov 20, 2019 #20

    Corradobrit1

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    To check the edge. Do what you did in last pic without the paper on the board. With handle overhanging the board, press on the heel with thumb and check for the deviation if any. Repeat on opposite side. Straight edges will show the same amount of deviation both sides.
     
  21. Nov 20, 2019 #21

    miggus

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    Here's a pic of my Moritaka AS 180. Not a maker famed for their F&F miracles... but straight.
     

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  22. Nov 20, 2019 #22

    Corradobrit1

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    To some degree Wat is correct. There can be some warpage during the HT and firing. However most times the big deviations are rectified using a hammer or a roller (I think this is how Kato does it as you can see the marks left on the Ku finish). But your blade is far from 'normal'.
     
  23. Nov 20, 2019 #23

    CiderBear

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    I'm curious to see what the edge looks like. I wouldn't want to keep a crooked knife either (regardless of whether the edge is straight or not), because I don't think you should pay full price for something that shouldn't have been sold in the first place. (although it looks like @JasonG paid extra for an upgraded handle as well)

    That being said, it looks like JasonG won't hear back from Watanabe until the end of this month - he posted an announcement on his website that he'll be away for a knife show in the US.

    Sorry you have to deal with this. I hope it works out in the end
     
  24. Nov 20, 2019 #24

    inferno

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    put the knife/edge on a flattened stone with light from behind.
     
  25. Nov 20, 2019 #25

    inferno

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    usually i'd guess they try to strighten them while the blades are still hot out of the quench or during tempering. I have seen some makers banging on them with hammers. This is very common.

    when the knife is hot in the oven (during austenitizing) or whatever they use it takes veeery little to bend it. ask me how i know.

    this blade however should not have gone out to a customer. CC should have caught it.

    as always you are not judged by your good work, only your bad. if you want a good reputation, dont send out lemons.
     
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  26. Nov 20, 2019 #26

    RDalman

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    San mai knives bend alot through all of the making process. Even during final grinding, so one needs to be on top of straightening them throughout.
     
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  27. Nov 20, 2019 #27

    JasonG

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    Hi All,

    Thanks again for being so quick to respond, this is all very helpful.
    I have attempted to take pictures that show the edge straightness. Let me know what you think.

    upload_2019-11-20_14-12-53.jpeg
    upload_2019-11-20_14-13-14.jpeg
    upload_2019-11-20_14-13-56.jpeg
    upload_2019-11-20_14-18-57.jpeg
    upload_2019-11-20_14-19-32.jpeg
    upload_2019-11-20_14-20-5.jpeg
    upload_2019-11-20_14-20-41.jpeg
    upload_2019-11-20_14-21-2.jpeg
    upload_2019-11-20_14-22-3.jpeg
    upload_2019-11-20_14-22-24.jpeg
     
  28. Nov 20, 2019 #28

    inferno

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    yeah its bent allright.

    for more effect when you send this to watanabe make sure the tip is pointing upwards away from the stone.
    you could also use the backside of that plate to not risk scratching the knife.
    also try pushing the bevel to the plate so the edge touches the plate, so its obvious how much warped up the tip is.
     
  29. Nov 20, 2019 #29

    Corradobrit1

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    Edge focus isn't good enough to be definitive. You will be the best judge. But from what I can tell the curvature is not as bad as the spine. But that would be enough for me get it replaced. I can overlook a lot of F&F issues (a prerequisite for anyone into TF) but overgrinds and poor linearity are deal breakers for me and enough to return.
     
  30. Nov 20, 2019 #30

    Corradobrit1

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    This. But some sneaky makers will bend the tip back to make it 'appear' straight. Careful attention must be given along the entire edge.
     

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