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  1. #1
    Platinum Member DMF's Avatar
    Join Date
    May 2005
    Posts
    642
    Location
    Mass
    Tractor
    Massey Ferguson 1552 Cab Model

    Default Rotary cutter blade sharpen & balance

    What is the best way to sharpen and balance rotary-cutter blades. I have touched up the edge with an angle grinder and then just weighed the blades to be sure they were reasonably close. Is this acceptable or is there a better way?

  2. #2
    Super Star Member
    Join Date
    Aug 2001
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    13,866
    Location
    Upper Midwest USA
    Tractor
    JD_4x2_Gator, JD_4300, JD_X485, JD_425, JD_455, JD_110

    Default Re: Rotary cutter blade sharpen & balance

    Sounds like a good plan to me. I don't weigh them, as I don't think the way they work that it is that critical, but then I don't grind a lot off each one either. I never remove them from the cutter, just grind in place. Just my way.

  3. #3
    Super Member Highbeam's Avatar
    Join Date
    Feb 2005
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    5,039
    Location
    South Puget Sound, WA
    Tractor
    Kioti CK30HST

    Default Re: Rotary cutter blade sharpen & balance

    I balance the lawnmower blade after sharpening because the driveshaft is also the engine crankshaft. On a brush hog, weighing should be more than enough, I wouldn't even do that unless a major amount of metal came off OR I noticed excessive abnormal vibration.

  4. #4
    Silver Member
    Join Date
    May 2005
    Posts
    201
    Location
    Erie, PA
    Tractor
    Kubota B2650

    Default Re: Rotary cutter blade sharpen & balance

    I take mine off and sharpen them on a bench grinder. After they are sharp, I continue to remove material from either side until each blade balances when the mounting hole is centered on a triangular piece of wood.

  5. #5

    Join Date
    Jun 2005
    Posts
    182
    Location
    S.E. Michigan
    Tractor
    Kubota L3400

    Default Re: Rotary cutter blade sharpen & balance

    This had just been discussed at some length in Parts/Repairs.
    Here's the link: Bush hog blade sharpener device.

    Most (myself inlcluded) seem to favor raising the brush hog on its side using your FEL, or to some extent your 3 point hitch if you don't have a FEL, and then sharpening the blades in place using a hand grinder.

    ...Tony

  6. #6
    Gold Member
    Join Date
    Jun 2004
    Posts
    274
    Location
    Goodrich IL
    Tractor
    Branson 4720

    Default Re: Rotary cutter blade sharpen & balance

    Yep I use a 4in grinder 60 grit disk, never take them off.
    I do a good job of making the same amount of pass's
    on both sides...close enough fur me!
    Gene

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