wear on blades...

Discussion in 'Lawn Mowing' started by Up North, Aug 31, 2004.

  1. Up North

    Up North LawnSite Bronze Member
    from MN
    Messages: 1,063

    How many times do you sharpen your mower blades before tossing them out? And at what point should I replace them due to wear? I have a couple sets that are starting get a "cup" or curve on the cutting edge, I can still sharpen them and they work fine but wondering if this is normal or at what point do they become dangerous due to this "cupping" or curving?

  2. Mycannon

    Mycannon LawnSite Member
    Messages: 98

    2-3 sharping maybe 75 to 100 hrs
  3. steve122

    steve122 LawnSite Member
    Messages: 208

    We will sharpen them and use them until the air dam wears thru. That is what we call the wing or lift or raised part of the back of the blade. Usually they start to show wear and get very thin at the outside edge. Once it wears through it goes quickly. Tried to use a set too long once and had an air dam break off. Shook the mower like crazy because of the serious imblance in weight. I'd watch that more than the cupping.
  4. Up North

    Up North LawnSite Bronze Member
    from MN
    Messages: 1,063

    Yes I noticed that the air foil or whatever it's called is wearing also, more so then the cupping on the cutting edge. Guess it's time for those blades to hit the trash.

    Like Mycannon says, I've got 3 maybe 4 sharpenings on this one particular set of blades that seem to be on their last legs. I'd guess about 40-50 hours on them only but they are the stock blades and not as thick as the Gator Magnums. And our soil is VERY sandy in this area, that probably wears on them too. Thanks for the input guys.

  5. maelawncare

    maelawncare LawnSite Senior Member
    Messages: 442

    Heck i have over 150 on my first set. Stock blades too. The tank blades are just like the machine, a tank.
  6. BCSteel

    BCSteel LawnSite Senior Member
    Messages: 876

    Are you guys mowing beaches or something? 50 hrs and their already worn out? Man, I sharpen my blades 2 or 3 times/week and they last all season long, one set, no problems. One set of blades will last me around 175-200 shapenings or around 600 - 700 hrs.
  7. chevyman1

    chevyman1 LawnSite Senior Member
    Messages: 852

    Yeah, but you are only mowing snow up there!
  8. Up North

    Up North LawnSite Bronze Member
    from MN
    Messages: 1,063

    I know most guys won't believe this, but yes, some areas are just like a beach here. Trimming is a PITA because you get sandblasted. Some lawns are very thin and the sand just gets whipped around by the mower, just like the dustbowl days.

  9. HayBay

    HayBay LawnSite Senior Member
    from Ontario
    Messages: 846

    If you are buying the thinner blades, they will wear faster.

    If you get .250 thickness, you have a quarter of an inch in steel to sharpen. If you get a lower number like .201 (j-thomas sells these ones cheap) they will wear faster.

    The Cub Cadet Tank like mentioned above comes with Marbane Blades at about .300 thickness. They are hard steel and thick. They last longer.

    Knockoff blades seem to be softer metal than the OEM's like the Marbane Blade. That is why the dealer wants $50.00 per blade for the Marbanes here.
  10. Up North

    Up North LawnSite Bronze Member
    from MN
    Messages: 1,063

    Very true Haybay. My stock blades that came with the Snapper Z are much thinner then the Gator Magnums I have. One set of Gators are starting to "cup" and my stock Snapper blades are very "cupped" and the foil that provides lift is now notched at the end where it's wearing out. I have another set of Gator Magnums that are still just fine, not much wear at all.


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