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  1. #1
    New Member
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    Dinuba, CA
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    1953 Massey Ferguson 50

    Default Rotary Cutter Blades

    I have a Howse rotary cutter, 5'. The blades look pretty dull to me. Any thoughts on when to re-sharpen vs. buying new? How do you get the blades off? I'm new at this tractor stuff.

  2. #2
    Elite Member DT86's Avatar
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    SWVA
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    Kubota 9540, RTV 900 and David Brown 885.

    Default

    How well does it cut? You don't want them super sharp any way.
    Last edited by DT86; 04-12-2013 at 12:05 PM.

  3. #3
    Gold Member unbidden's Avatar
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    R.I.
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    Kubota BX2660

    Default Re: Rotary Cutter Blades

    If the blades are not all dinged and chipped, resharpen is the option I'd use. I do mine my-self as I would guess most here do the same?


    Foster Center, RI

  4. #4
    Elite Member
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    SW WA
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    Kubota BX2360

    Default Re: Rotary Cutter Blades

    I looked at some new mowers the other day, while they were standing on end on their shipping pallets. The blades had about 1/16 inch or a little less "flat" cutting edge.

    Bruce

  5. #5
    Bronze Member
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    Hanover County, VA
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    John Deere 750, John Deere X540, Wallenstein BXMT3213 chipper shredder, Befco bush hog

    Default Re: Rotary Cutter Blades

    I don't know the exact rule for when to replace versus sharpen, but I think some folks say to replace after sharpening removes more than about an inch of blade width. Here's what my blades looked like when I replaced them. I'm told the corner at the tip of the blade is most important, as that's where most of the cutting happens. I replaced these because about an inch of material was gone at the tip.
    -image-jpg

  6. #6
    Elite Member
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    Mar 2009
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    Lee, IL
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    John Deere 1070

    Default Re: Rotary Cutter Blades

    If the blades aren't that bad, I sharpen them with an angle grinder without removing them. As already stated, they don't need to be "sharp" really.

  7. #7
    Super Star Member
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    Missouri
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    Kubota, John Deere, Case, Massey Ferguson, Ford

    Default Re: Rotary Cutter Blades

    From my Land Pride Manual:

    Both blades should be sharpened at the same angle
    as the original cutting edge and must be replaced or
    re-ground at the same time to maintain proper
    balance. The following precautions should be taken
    when sharpening blades:
    a. Do not remove more material than necessary.
    b. Do not heat and pound out a cutting edge.
    c. Do not grind blades to a razor edge. Leave a blunt
    cutting edge approximately 1/16” thick.
    d. Always grind cutting edge so end of blade
    remains square to cutting edge and not rounded.
    e. Do not sharpen back side of blade.
    f. Both blades should weigh the same after
    sharpening with not more than 1 1/2 oz.
    difference.

    There isn't much information on when to replace:

    "Inspect cutting blades. Make certain they are
    properly installed and are in good working condition.
    Replace any blade that is damaged, worn, bent, or
    excessively nicked. Small nicks can be ground out
    when sharpened."

    I tend towards sshaw and replace when worn to the point where I can't get a good square end though I have seen a lot of cutters with much worse blades still in use.

  8. #8
    New Member
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    Dinuba, CA
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    1953 Massey Ferguson 50

    Default Re: Rotary Cutter Blades

    TripleR, thanks for the info. Very helpful. Do you take your blades off to sharpen?

  9. #9
    New Member
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    Dinuba, CA
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    1953 Massey Ferguson 50

    Default Re: Rotary Cutter Blades

    I appreciate all the feed-back. helpful. This was my first question. Glad I found tractorbynet!!!

  10. #10
    Super Star Member
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    Default Re: Rotary Cutter Blades

    Quote Originally Posted by John Palms View Post
    TripleR, thanks for the info. Very helpful. Do you take your blades off to sharpen?
    If they are not too bad, we sharpen them on the cutter with a 4" angle grinder. If a lot of metal needs to be removed, we take them off.

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