Blade tip speed

Discussion in 'Lawn Mowing' started by JimmyStew, Mar 23, 2008.

  1. JimmyStew

    JimmyStew LawnSite Senior Member
    Posts: 367

    How important it blade tip speed on a mower, or more importantly, how slow is too slow? I see that many of the WB mfg are up near 17k or 18k. I'm looking at a new Husqvarna WB with a tip speed of 15.9k. Will there be a noticable difference in cut?
     
  2. Turf Commando

    Turf Commando LawnSite Bronze Member
    Posts: 1,186

    Could be noticeable.
    The faster the blades move the sharper, more define the cut....
     
  3. blind04

    blind04 LawnSite Member
    Posts: 117

    i agree with turf cammando. i have nothing but exmarks for mostly the very reason of there very very high blad tip speed. 28,500 rpm. and they cut like better than anything i have ever seen. so it is most likely very important
     
  4. MONTE

    MONTE LawnSite Senior Member
    Posts: 793

    On a walk behind it will not be as big of a factor!
     
  5. lawnspecialties

    lawnspecialties LawnSite Silver Member
    Posts: 2,513

    Monte makes a good point.

    But with any mower, tip speed is just as important as ground speed and even horsepower. I have a Deere 717A I use on some smaller properties. The only real complaint I have is the 16,500 blade tip speed. The quality of cut in deep fescue would benefit greatly with another 2,000 fpm, IMO.
     
  6. lifetree

    lifetree LawnSite Fanatic
    Posts: 5,370

    This must be a typo ... probably blade tip speed is 18,500, not 28,500 !!
     
  7. duke & sons

    duke & sons LawnSite Member
    Posts: 29

    Hey Lawn Specialties

    You can up the blade speed to 18,000 on the 717A, by buying a new clutch with the bigger pulley. This is how JD increased the speed on the 717A in 2006 with the 7iron II deck.

    I mulch full time with mine and the increased speed helped.

    I think the cost was $150-$170.
     
  8. duke & sons

    duke & sons LawnSite Member
    Posts: 29

    I forgot to mention, you will have to increase the rpms on your engine. The bigger pulley will draw the engine down.
     
  9. macguy

    macguy LawnSite Member
    Posts: 18

    Anything over 18k is fine. IMO the bigger determination of cut quality is the design of the deck.
     
  10. mowerbrad

    mowerbrad LawnSite Fanatic
    Posts: 6,273

    If you are going to be mowing at faster speeds the faster blade tip speed will help to insure that all the grass is cut and not have any left un cut. The faster blade tip speed the better.
     

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