Sharpening Blades

Discussion in 'Lawn Mowing' started by LawnBoy627, Feb 5, 2013.

  1. LawnBoy627

    LawnBoy627 LawnSite Member
    Messages: 94

    What is the best way to sharpen blades? With a hand grinder or bench grinder? Also how often should blades be sharpens?
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  2. Nate'sLawnCare

    Nate'sLawnCare LawnSite Bronze Member
    Messages: 1,001

    The "best" way to sharpen blades is with a dedicated blade sharpening machine, but not all of us can justify that expense. I use a bench grinder and try to sharpen before they get really dull. Otherwise, it effects the cut quality and takes much more effort to restore the blade edge. I'd say my blades normally don't go more than 6 or 8 hours at the most without being sharpened and I try to keep a sharp spare set ready all the time in case I don't have time to stop and sharpen.
  3. Sprinkler Buddy

    Sprinkler Buddy LawnSite Bronze Member
    from Florida
    Messages: 1,185

    Their are a few post on here on this very topic, search for them, they will answer your questions and then some. :)
  4. grasshopperslawn

    grasshopperslawn LawnSite Senior Member
    Messages: 293

    We sharpen blades everyday
  5. Mickhippy

    Mickhippy LawnSite Platinum Member
    Messages: 4,275

    I dont know how you cant justify the initial expense! The amount of time saved on daily maintenance, ease of use, extended blade lifespan etc make a dedicated sharpener a very good purchase! Its up there with air compressor, a good impact wrench and air gun. If your in the business long term, get shop tools that make life easier and saves money long term.

    Heres a vid. Excuse the talking etc, seemed a good idea at the time...
  6. Landrus2

    Landrus2 LawnSite Fanatic
    Messages: 5,050

    If you practice enough a hand grinder will do a great job. And for how often every day.
    We usually sharpen blades on service day. We sharpen like 50 blades at a time from different machines and every morning we switch them.:waving:
    Joema likes this.
  7. Magna-Matic

    Magna-Matic Sponsor
    Messages: 839

    Hello All,

    Just posting so any new people to lawnsite have our website link.

    Aside from our equipment we do provide educational information at our site about lawnmower blade tip geometry and information about proper balance.

    If you are not in the market for a lawnmower blade sharpener, we generally recommend a good machinist metal file over bench grinders or angle grinders. Simply due to the fact that with those motorized options where you "free hand" the angle - it is very difficult to maintain any consistency of the angle.
    So while it is slower, the file will allow you much better control of the quality.

    Thank you,
  8. LawnGuy73

    LawnGuy73 LawnSite Bronze Member
    Messages: 1,946

    ^^^ Agreed, spendy but worth every dime! ^^^
  9. BckYrdLmbrJk

    BckYrdLmbrJk LawnSite Member
    Messages: 240

    I've tried several methods throughout the past couple years. I don't like using my bench grinder for blades, occasionally for a quick sharpen I'll put each blade in a vise and run a grinder over in from the inside to the outside with equal pressure.

    The problem with doing it this way, atleast for me is that after a while your blades will get a curve in them thats hard to get rid of.

    Now I use a metal chop saw with a blade that's about 12" in diameter. I hold the saw in the raised position and sharpen the mower blade against the side of the saw blade. This way I get a straight even sharpen. I think this is the best way for me to sharpen blades, and the quickest, but it doesn't work well on blades that already have that curve cut into them so watch for that
  10. grasshopperslawn

    grasshopperslawn LawnSite Senior Member
    Messages: 293

    We use a magnamatic blade sharpener.

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