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Thread: Japanese mortise chisel skewed?

  1. #1
    Join Date
    Jan 2018
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    Vancouver Canada
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    Japanese mortise chisel skewed?

    I got a pair of used Japanese mortise chisels used, quite cheap but both of them have the cutting edge skewed. Is this an error on the part of the previous owner?
    I assumed that like my bench chisels, the cutting bevel should be square to the sides.
    Am I wrong?
    Young enough to remember doing it;
    Old enough to wish I could do it again.

  2. #2
    Join Date
    Sep 2007
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    Longview WA
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    Is the bevel flat, hollow or convex?

    Approximately how many degrees are the chisels skewed Aaron?

    It could just be a case of sloppy sharpening by a previous owner.

    One of my mortise chisels came with a bevel that was lightly skewed with the bevel sloped to one side. This seemed to cause it to twist in the cut until the bevel was corrected.

    jtk
    "A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
    - Sir Winston Churchill (1874-1965)

  3. #3
    Join Date
    Feb 2004
    Location
    Perth, Australia
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    Aaron, unless a chisel is intended for a slicing action on the push stroke, all should have a squared blade. Since these came used, I imagine that the previous owned was either cross-eyed, careless or both. Grind and hone them square, otherwise they will not cut straight.

    A pair of Fujikawa (6mm and 9mm) ...



    Fujikawa began making mortice chisels a long while back, specialising in this type of chisel. They now offer a wider range. I ground/honed these (single bevel) to 30 degrees, where they seem fine to date. You can go higher (say 35 degrees) if you need.

    Regards from Perth

    Derek

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