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Thread: Can Tersa Knives be Sharpened?

  1. #1
    Join Date
    Nov 2006
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    Heathrow, FL
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    Can Tersa Knives be Sharpened?

    The title says it all. Didn't know if there was a reason not to sharpen them. I assume they're good steel and worth reusing.
    Brian

  2. #2
    Join Date
    Nov 2006
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    Austin, Texas
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    As you know, the amount of steel is very small... it isn't like a big old jointer blade. And the advantage is the precise position of the edge relative to the alignment groove. Sharpening will obviously change that spacing.

    I tried to sharpen the disposable blades on my Delta planer, using a Tormek, prior to getting one that used Tersa knives, and had limited success. I wouldn't want to bet on your success sharpening Tersa knives. But if you succeed, let me know!
    Charlie Plesums, Austin Texas
    (Retired early to become a custom furnituremaker)
    Lots of my free advice at www.solowoodworker.com

  3. #3
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    Nov 2006
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    Heathrow, FL
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    Thanks Charlie for the feedback. It was the size that made me ask the question but thought honing an edge may be feasible. I have an extra set so maybe I'll send these to a good sharpener I know and see what he can do with them.

    What is the best place to buy replacements?
    Brian

  4. #4
    Join Date
    Nov 2006
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    Austin, Texas
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    I don't have a preferred source for Tersa knives yet.

    My chrome set (that many say are just for softwood) have retained their basic sharpness far longer than I expected - the finish is good, but not as good as the HSS, so I assume they weren't as sharp, but the hardness of chrome kept them sharp longer. I plane all my rough lumber with the chrome set. The HSS set gives a better finish, but is dulling faster, and far more subject to dings - probably sharper but not as durable.

    I have wondered if I could "tune up" the HSS set with a stroke or two with a diamond hone, while they are in the machine. Not sharpening enough to remove measurable steel, but just a "touch up." I do have a mark on the knives so that I know which is the first side and second side of each blade - that would also help keep the three knives in my set the same if I honed one side of the three knives.

    If you try honing, let us know how it works.
    Charlie Plesums, Austin Texas
    (Retired early to become a custom furnituremaker)
    Lots of my free advice at www.solowoodworker.com

  5. #5
    Join Date
    Oct 2006
    Location
    ozarks
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    4,992
    brian, i remember reading about a company that claims to be able to sharpen tersa knifes?....but i`ve never tried `em.....i switched to the m-42 steel and am really impressed with the life(but not the price )......i`d wonder what about the cutting geometry would change with a sharpening? if you decide to try it please keep us posted.....tod
    [SIZE="1"] associated with several importers and manufacturers.[/SIZE]

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