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ZTR blade mounting question

Discussion in 'Lawn Mowing' started by machsixer, Oct 12, 2006.

  1. machsixer

    machsixer LawnSite Member
    Messages: 33

    I have maybe a weird question. Does it matter if I mount all three blades at the same "position" after sharpening? So they would all form one big straight line under the deck. Does this even matter? Does the way blades are mounted effect the efficiency of the grass discharge rate etc? Hope this question makes sense to everyone.
  2. DEEJ

    DEEJ LawnSite Member
    Messages: 230

    On most machines it makes absolutely no difference. If there is a standard V belt driving the blades (as with most commercial moweres), the blades will not remain in the same position for very long at all. Small tolerance differences in the size of the pulleys, belt slippage, hitting obstacles, etc will all move the blades relative to one another. On all v belt driven decks, there is no "timing" of blades. Set them in one position, cut for a day, then look under the deck. They won't even be close to where you set them.

    There are a few machines out there that drive the blades with a cogged belt and cogged pulleys (much like a timing belt in a car). Some do this because the blades will hit each other if they are not kept in a "timed" position relative to each other. On these machines, the blade position is very important.

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