Timing Your Blades

Discussion in 'Lawn Mowing' started by Jerrys Lawn Service, Mar 1, 2001.

  1. Jerrys Lawn Service

    Jerrys Lawn Service LawnSite Member
    Posts: 155

    Hey guys and girls I found out something new today, I found out about blade timing. It seems that you need to position
    your blades as to uptimize air flow and lift. They said that while changing blades it matters how they are positioned when put back on. If you have a three blade set-up, one blade goes vertical, one horizontal, then one vertical. This was new to me, has anyone heard of this or could tell us a little more about this.

    Good Luck!

  2. plow kid

    plow kid Banned
    Posts: 516

    what happens when you turn off the pto?, they slow down at their own rate and would mess up the pattern.
  3. BryanB

    BryanB LawnSite Member
    Posts: 33

    I have a Kubota with a belly mower w/ t3 bladea and in the manual it says that you are supposed to position them a certain way. Itried if diffferently one time and It cut terrible. They dont go as you said though. The angles are a little different.
  4. Ssouth

    Ssouth LawnSite Senior Member
    Posts: 437

    Never heard of this but always wondered. I have always postioned my blades in the same direction. I will try to stagger them this week and see if it makes a difference. Do you know the reasoning behind this? Also if running double blades should you stagger the blade setup? thanks for the thread. Just another reason LS in an invaluable resource.
  5. Runner

    Runner LawnSite Fanatic
    Posts: 13,494

    Great concept! However, just not practical. Like it was said, not just when you disengage the blades, but as soon as you engage them, some will grip just a little sooner than others, throwing the whole pattern off. Try it and see!
  6. TJLC

    TJLC LawnSite Bronze Member
    Posts: 1,308

    I've never given it any thought until now. I just mount the blades in any random position. Interesting question, though. Maybe I've been wrong all this time. Lets see what responses this brings.
  7. awm

    awm LawnSite Gold Member
    Posts: 3,354

    pretty sure what runner said is fact
  8. Runner

    Runner LawnSite Fanatic
    Posts: 13,494

    TJLC, If that's what you have been doing all this time, then....you've been doing it right! Saaame here!
  9. plow kid

    plow kid Banned
    Posts: 516

    i have never done anything special either, just slap them on torque them down and go
  10. Jerrys Lawn Service

    Jerrys Lawn Service LawnSite Member
    Posts: 155

    I've been thinking about this after reading some of your thoughts,now on my mowers all of the blades are held in sync
    as one complete unit by spring loaded idler pullies. all three blades are kept under belt tension all the time. So when you kick in your electric cluch all three should turn at once,and when you turn off your PTO all three should slow
    down at the same rate, the only thing that would change the pattern is belt slippige.

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