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Blade sharpening. I'm inexperienced.

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  • Blade sharpening. I'm inexperienced.

    This is a blade for a food processing machine. It has a one-sided blade---opposite ends are sharp for rotating clockwise (this is shown backside-up). How would you sharpen this? Other than my pocket knife and lathe tools, I'm not experienced with sharpening. The blade is steel, but I know nothing more of its composition. Just use a fine bench stone and hone the edge until dead sharp? Should I actually deburr the edge after that? I seem to remember reading that a perfect point on a blade is not the most beneficial for cutting. This blade is roughly 12" end to end and is meant to cut vegetables and pasta, etc. Am I overthinking this? Thanks--I know I just laid 12 questions on y'all

  • #2
    Likely some form of stainless. If it doesn't turn fast (balance not an issue) you should be able to file or grind on a sander, then stone if desired. If it needs to be balanced the same methods are fine, you just get to do an extra step to rebalance when done.
    Southwest Utah


    • #3
      The machine is quite slow, as you mention. Geared reduction motor. I'm guessing no more than 100rpm at the blade.


      • #4
        If the blade is soft enough, a few strokes with an 8 or 10" mill bastard file should be all you need. The slight serrations left will help macerate the material being worked like a serrated knife. Holding the blade firmly in a vise makes the whole thing easier.

        All I've ever done on this stuff is to determine which side was bevelled from the original sharpening and use a file to bring that surface down far enough to make the edge sharp again. Sometimes on very thick blades (like lawnmowers) a grinder can speed the process up if used with discretion.

        One time in a remote camp, I spent an afternoon with a piece of wood, some vegetable oil, and some fine emery cloth sharpening the cook's knives. The special cream puffs she made were worth the effort....
        Design to 0.0001", measure to 1/32", cut with an axe, grind to fit