Do you sharpen new blades?

Discussion in 'Lawn Mowing' started by johnwright238, May 28, 2012.

  1. johnwright238

    johnwright238 LawnSite Member
    Messages: 226

    I replace blades that have been beaten up by rocks and foreign objects but I don't sharpen them first. If the wear and tear is not too bad, that is when I break out my angle grinder with a 60grit flap wheel and put a 45 degree edge on the cutting side and a few steep passes on the backside.

    How do you guys take care of your blades? Tempted to try "new" blade designs but always keep going with regular mulching blades. Anyone have a success story on a particular blade design I should give a try?
  2. baileylawnservice

    baileylawnservice LawnSite Senior Member
    Messages: 530

    High lift until leaf time then gator blades. Sharpen as needed....
  3. Dr.NewEarth

    Dr.NewEarth LawnSite Bronze Member
    Messages: 1,476

    We sharped new blades. Alot of times they're coated in paint to stop them from rusting in storage before they're sold.

    Our blades are sharpened on a 30 degree angle????
  4. Roger

    Roger LawnSite Fanatic
    Messages: 5,943

    As somebody noted, the angle for most blades is 30, or 33 degrees. 45 is way too steep. Also, I have never read anywhere that a blade should be touched on the backside (maybe a flat handfile to take off a burr, but never a grinding).

    To answer the question: Yes, all new blades need sharpening. Usually, the manufacturing process includes a shear to take off the edge, but the shear does not make the blade sharp for cutting operations.
  5. stansoph

    stansoph LawnSite Member
    Messages: 130

    Yes. I still sharpen my rotary blades from tip to center. I don't know if it really helps but it looks cool.
  6. jsslawncare

    jsslawncare LawnSite Bronze Member
    Messages: 1,673

    1. I use a Magna Matic sharpen.
    2. No, I don't sharpen new blades or wash my new underwear.
    3. I guess that's all I got.

    THIESSENS TLC LawnSite Senior Member
    Messages: 892

    I always sharpen new blades, as somebody else said they are coated in paint and imo just not sharp enough. :drinkup:
  8. Hawkshot99

    Hawkshot99 LawnSite Bronze Member
    Messages: 1,431

    Sharpening or not depends on the brand. With the Exmark blades I got from the dealer it was never really required. They mowed great new. My Oregon G6's came with a thicker coat of paint on them, and did a piss poor job with no sharpening. After I sharpened they were a totally different blade.
  9. weeze

    weeze LawnSite Fanatic
    Messages: 12,746

    i don't sharpen new blades. the coating wears off very quickly. i've never noticed a bad cut when putting on new blades. usually brand new blades that haven't been sharpened cut even better than older blades that just have been sharpened. it's because the edge on new blades is perfectly straight and at the right exact angle.
  10. johnwright238

    johnwright238 LawnSite Member
    Messages: 226

    I like a 45 on my blades because i think it lasts longer with not much sacrifice in the cut, but it sounds like I need to take time out and see what works best one day soon.

    Thanks guys for the input;)

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