How often to sharpen blades??

Discussion in 'Lawn Mowing' started by chapandrew6, Jun 15, 2011.

  1. chapandrew6

    chapandrew6 LawnSite Member
    Posts: 35

    I was wondeing if anyone had an idea of how many hours they have on their mower before they will sharpen the blades? Just noticed this week that my blades are cutting all the grass so I bought a second set of blades (easier to just put a new set on and then I can buy a grider or something to sharpen the old set). My mower only has 32 hours on it and I figured I could go a year before I would need to sharpen them. I only have 6 yards, maybe a total of 3 acres that this mower cuts and im cutting once a week. bought the mower at the end of last year and with our drought in ohio, i only had 9 hours on it by the end of the season (plus I was only cutting 2 yards at the time). Its a Cub Cadet ZTR50.

    Thanks
     
  2. epm

    epm LawnSite Member
    Posts: 54

    I like to change every 8-12 hours. So dependant on you workload, daily.
     
  3. rob640

    rob640 LawnSite Member
    Posts: 167

    I inspect them daily and usualy sharpen once a week. sharper blades, smoother cuts, wont burn the grass as easy as dull blades
     
  4. chapandrew6

    chapandrew6 LawnSite Member
    Posts: 35

    If you sharpen them about once a week, how many yards do you have / how many acres do you have to cut?
     
  5. vencops

    vencops LawnSite Bronze Member
    from NC
    Posts: 1,537

    I change mine every 15hours on the ZTR. No more than I use the WB, I can't judge how often to change them, yet. My WB doesn't have an hour meter.

    Good luck. In my VERY limited experience, I can still see when I need to change them. My goal is to get them changed before that time.
     
  6. Exact Rototilling

    Exact Rototilling LawnSite Fanatic
    Posts: 5,362

    Freshly sharpened blades go on on every 8-12 lawns. Sometimes more frequently. As soon as the blades feel even slightly rounded they get pulled. The higher the lift of the blade the quicker they get dull. Oregon blades really do stay sharp longer.

    I currently use an angle grinder and I’m able to maintain very consistent angles. I have my methods in doing so. I currently use a cone balancer. I’m looking for an excuse to buy a Magana matic 8000 or 9000 and balancer. I know this will save me time and the cost of going through course grit discs. It just needs to pay for it’s self somehow. Been considering opening shop on the side sharpening blades.
     
  7. chapandrew6

    chapandrew6 LawnSite Member
    Posts: 35

    I guess it goes to show im still a rookie at this....hehe. im guessing I probably need to swap mine about once a month. Just gotta find some type of cheap sharpender.....neighbor was telling me about a thing that attaches to your drill for about $10 up at home depot that is an angle grinder or works perfect for sharpening the blades.
     
  8. dhardin53

    dhardin53 LawnSite Senior Member
    Posts: 711

    Gators magnums (Oregon) last a long time. But I mow very deep grass/weeds 30 yards last month, all grass was over 24" tall. Than 25 yards a week of my own commercial and residential yards. I try not to over sharpen but if I go over 2 weeks my residential and commercial lawns start looking rather shabby and have to slow down to get a satisfactory cut. I really wear the blade down if I wait to long. All i get is about 3 or 4 sharpens out of a gator. On average use 3 or 4 sets a year.

    Angel grinder or a big bench grinder is what I use to bring it to straight consistent tip. Not super sharp.
     
  9. chapandrew6

    chapandrew6 LawnSite Member
    Posts: 35



    So are you saying that you have to buy 3-4 sets of blades every year? I thought blades would last YEARS before having to be thrown out.....
     
  10. GravyTrain

    GravyTrain LawnSite Senior Member
    Posts: 375

    I put on a new set of blades at the beginning of last season (if I remember correctly). I'm a part time and last year only had less than 20 customers all season all between 10-14 days between cuts. I bought a new set of blades this past weekend, and realized that it was about a month over due (i just kept putting it off, can't really say why).

    As for sharpening, I sharpen about once a week or twice a week. I'd guess that is somewhere between 8-16 hours of mowing between sharpening.
     

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