blade angle & cut quality issue??

Discussion in 'Lawn Mowing' started by lawnchopper, Jun 5, 2005.

  1. lawnchopper

    lawnchopper LawnSite Member
    Posts: 211

    when sharpening a blade and not sharpening at the right degree could that have a effect on cut quality and dispersal of the clippings. Boss wont buy a blade sharpener so i have to you a hand grinder to at least come close to the factory angle. I have used a bench grinder which is almost impossible at times to come close and i end up sharpening at to steep of a angle.
    Im getting stringers and dispersal problems at times
     
  2. lawnchopper

    lawnchopper LawnSite Member
    Posts: 211

    dont everyone speak at once...................
     
  3. txlawnking

    txlawnking LawnSite Bronze Member
    Posts: 1,905

    To be honest, I don't think the angle really matters too much. That is unless you cut it so steep that it dulls in 5 minutes. I'd park the machine on level concrete and make sure that everything is square to the world. But really, the condition you describe may be indicative of belts that are slipping, or pulley's/ belts that are worn out..
     
  4. lawnranger44

    lawnranger44 LawnSite Senior Member
    Posts: 370

    our blades were pretty steep this past spring and we grinded them down to about a 45 degree angle. I think it cuts a lot better and there is less grass build up on the deck.
     
  5. Lawn Sharks

    Lawn Sharks LawnSite Senior Member
    Posts: 394

    I would ask the MagnaMatic guys this question. Believe they have their own formum here. If anyone knows about mower blades they do.
     
  6. orangejbird

    orangejbird LawnSite Member
    Posts: 62

    I just use angle grinder and go roughly 30 degrees.
    I also grind towards the other end about 2" further than the factory.
    You'd be surprised how much the cut improves and takes less power. :cool2:
     
  7. KathysLGC

    KathysLGC LawnSite Bronze Member
    Posts: 1,345

    How are the tips on the blades? Are they rounded? How fast are you mowing?
     
  8. DLS1

    DLS1 LawnSite Bronze Member
    Posts: 1,619

    Take the blades to get sharpened using a professional blade sharpener and then you will find out if it is the blades or something else. It will only cost you $5 or $6 a blade and you will also get them back to the correct angle.
     
  9. wacamaster

    wacamaster LawnSite Member
    from MI
    Posts: 198

    If the mower isn't cutting to it's normal quality, and the belts seem fine... it has to be the blades. I sharpened my wrong for 2 days and they cut worse then anythign I've ever seen. Woulda actually been better had I not sharpened em at all.
     
  10. Fantasy Lawns

    Fantasy Lawns LawnSite Bronze Member
    Posts: 1,913

    A narrower angle, such as that of a knife, will cut well initially, but will dull quickly and nick easily.

    On the other hand, a blade with a less severe (more blunt) angle will not provide the same quality of cut, even though it might wear more slowly.

    Most may say between 20-40 degree angle .... while many pro sharpen blades or even those sold by the manufacturer tend to have a 30 degree angle which is what I use .... at 30-35 degrees the cut is very good .... the time to re-sharpen is minimum ..... I like em sharpened every 6-8 hours of cut time in the growing season

    on a side note .... talk of growing season with 10" of rain last 6 days n soon 90 degree sunny weather .... can watch the grass grow
     

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