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Importance of blade tip speed and deck depth?

Discussion in 'Lawn Mowing' started by buckhtr77, Apr 23, 2008.

  1. buckhtr77

    buckhtr77 LawnSite Member
    Messages: 34

    I'm in the research phase of purchasing a ZTR mower. I'll be mowing 2.5 acres of flat ground. I'm not looking to set speed records but want the cut to look the best I can make it look. That said, I've looked at mowers that are in the mid 18,000's for RPM's and today I was looking @ the specs for the Kubota ZG227 with 27 HP/54 Inch and the tip speed is 17,100. Is this something to fret over? Will I be able to tell cutting just 2.5 acres? Please shed some light on this for me?

    I'd also like to ask about deck depth. I seen on some Scags it was 5.0 inches, Exmark 5.5 inches, and the Kubota 6.0 inches. Of what importance is the deck depth?

    Thanks for the help.
  2. tacoma200

    tacoma200 LawnSite Fanatic
    Messages: 5,426

    I wouldn't get hung up over deck depth or tip speed, specifications are not a good way to pick out a ZTR though one may look better on paper. Take you time and do some research. What are the local LCO's running? Do you like the way they leave the lawn. Find lawns you like the cut on and find out what type ZTR cut it. It should be no problem driving around seeing what it being used in your area. Are your lawns very high quality Northern grasses? Kubota's are great ZTR's but they are not as popular as some others on Lawnsite. If your cutting in decent conditions an Exmark is hard to beat. I run my Scag more than my Exmark, but I'm not cutting flat ground in good conditions most of the time. Most top ZTR's have plenty of blade speed and deck volume. Even though my Scag Velocity Plus deck is shallower than an Exmark it will handle much more grass. It is not as deep but much longer which makes a difference. Watch the guys in your area and demo each one carefully under less than ideal conditions. Don't go only by the numbers and specs. See how they preform in the field.
  3. lawnprosteveo

    lawnprosteveo LawnSite Bronze Member
    from Tulsa
    Messages: 1,930

    I always thought the deeper decks and faster blade tip speed determined how much grass it could handle...
  4. Ford850

    Ford850 LawnSite Member
    Messages: 132

    Keep your blades sharp, your deck level with a slight rake front to back, and most mowers will do great for you.
  5. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 14,449

    I guess you assume there are a lot of companies selling equipment that won't cut your grass:hammerhead: If you are that concerned get a Walker you won't be disappointed.
  6. lawnspecialties

    lawnspecialties LawnSite Silver Member
    Messages: 2,524

    Last season I purchased a 717A for mowing my smaller "high-end" properties. I have really enjoyed this mower but the one thing I believe keeps it from being an almost perfect small frame ztr is it's lower blade tip speed. It's only listed as 16,500 fpm compared to my Hustler's 18,000+. Yes, I'm comparing two different brands and sizes but I know the 717A wouldn't leave rows in really thick fescue and my clippings wouldn't be as large if the blade tip speed was higher.

    Just my .02.:)
  7. grassman177

    grassman177 LawnSite Fanatic
    Messages: 9,795

    i think tacoma nailed this answer!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
  8. mngrassguy

    mngrassguy LawnSite Silver Member
    Messages: 2,167

    Dealer service and ease of getting parts is more important than specs. I just found out it will take 3 weeks to get a part for my Lesco, NEVER AGAIN.
  9. Macdiesiel

    Macdiesiel LawnSite Member
    Messages: 82

    Exmark all mowers 18,100 btrpm
  10. gene gls

    gene gls LawnSite Gold Member
    Messages: 3,213

    Deck design is a BIG factor in cut quality and quanity.

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