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  1. #11
    Super Member /pine's Avatar
    Join Date
    Mar 2009
    Posts
    7,831

    Default Re: What's the correct way to sharpen a mower blade?

    Rotary mower blades are meant to shear blades of grass not slice them like a knife through a tomato...

    a 1/64" blunt edge is what is recommended by most oem's...
    Slash Pine
    blunt and succinct yet sincere I don't suffer fools and morons...in the immortal words of Popeye..."I yam what I yam"

  2. #12
    Elite Member Deere Dude's Avatar
    Join Date
    Feb 2011
    Posts
    3,312
    Location
    Beaver Dam Wisconsin then to Hohenwald, TN
    Tractor
    John Deere 3720

    Default Re: What's the correct way to sharpen a mower blade?

    My BIL worked at a coop and was the blade sharpener for a few years. He would sharpen the blades nice and sharp then knock down the sharpness with a file before he gave them to the customer. Customers failed to see the reasoning behind it and all he said was it is so you don't cut yourself, but it does seem counter-intuitive. I let sticks and stones dull mine.
    JD 3720 with R4s and bulldozer capabilities.
    X740

    13 Millimeter = 1/2"--------25 Milimeters=1"-----------100 Millimeter = 4"----------1 Meter = 40---------1 Kilometer = 3300' or 5:8 ratio

    A 13mm will but will be just slightly larger than a 1/2" nut.

  3. #13
    Super Star Member
    Join Date
    Dec 2007
    Posts
    10,259
    Location
    Central Ohio
    Tractor
    JD 5520, 790- Kub L4300, B7800, MX5100, M7040

    Default Re: What's the correct way to sharpen a mower blade?

    I'm the OP and here's what I did. The plan was to sharpen them and the knock the edge off but I just left them sharp and as suggested, paid attention to the ends of the blades. I only had a couple of nicks. Anyway, it now mows like a dream. Also, it's a rear discharge and had been windrowing grass before but after sharpening the blades the grass is evenly distributed behind the mower and the yard looks great. I'm going to sharpen every few months now.
    **

    May I be the kind of person my dogs think I am,

  4. #14
    Gold Member japody's Avatar
    Join Date
    Oct 2013
    Posts
    462
    Location
    Richmond & Boydton VA
    Tractor
    Ford 4000 & 5000

    Default Re: What's the correct way to sharpen a mower blade?

    If you're cutting anything that will leave staubs, you don't want a sharp blade. A sharp blade will leave staubs that will puncture tires. A slightly dull blade will shatter the staub leaving frizzled (that's a technical term) ends.

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