Results 1 to 4 of 4
  1. #1
    Gold Member Ginormous's Avatar
    Join Date
    Apr 2011
    Posts
    457
    Location
    Dayton, Ohio
    Tractor
    Yanmar YM2210

    Default slip clutch vs. overrunning clutch?

    How does a slip clutch differ from an overrunning clutch?
    Yanmar YM2210, Taylor-way 5' finish mower, Woods 4' rotary mower, boom pole, hayride wagon; upgraded tractor with gas turbine engine plus strap on solid rocket motors for that extra boost of speed... but brakes only work when I'm on the ground.
    <><

  2. #2
    Veteran Member
    Join Date
    Jun 2010
    Posts
    1,378
    Location
    Southern California
    Tractor
    International Harvester 284, Yanmar 1401D, Yanmar 240

    Default Re: slip clutch vs. overrunning clutch?

    A slip clutch functions as overload protection, like a shear pin. If too sharp or extreme of a load is placed onto the PTO drive, the clutch slips, protecting the driveline of the tractor and/or implement from spikes in force that may break something. On a tiller, a large rock, log, or other object may get caught in the tines suddenly, and rather than breaking something on the tiller or tractor, the clutch slips.

    An overrun clutch prevents the tractor being propelled forward by power from the implement. Especially with implements that have lots of rotating mass (Mowers, hay rakes, etc) there is a lot of momentum built up in the rotating assembly. Depressing the clutch disconnects the engine from the transmission, but the implement is still fastened directly to the transmission. This means the tractor will be driven forward for quite some distance, with no way for the operator to cut the power to the wheels.

    The overrunning clutch is a one way ratchet that keeps the implement from spinning the tractor's PTO shaft and stops the issue of the implement driving the tractor. It's a serious improvement in safety, as well as usefulness of the machine, too. I universally recommend an overrunning clutch for people whose tractors don't have one internally if they are mowing or doing similar things.

  3. #3
    Super Member kenmac's Avatar
    Join Date
    Feb 2005
    Posts
    5,481
    Location
    The Heart of Dixie
    Tractor
    yanmar 3110D

    Default Re: slip clutch vs. overrunning clutch?

    what he said. Use overrun clutch on rotary cutter.. Use slip clutch for tiller
    Yanmar 3110D
    07 Dodge 2500 5.9 Cummins
    Husky 372xp
    Husky 55 Rancher
    Maruyama trimmer
    Husky trimmer
    Redmax BP blower
    Toro zero turn
    North Star 4 K PSI pressure washer
    Honda 300 4 trax
    Yamaha Timberwolf
    liquid logic coupe kayak
    16' Tow Master Dump Trailer ,20' Yanmar Hauler

  4. #4
    Elite Member Car Doc's Avatar
    Join Date
    Mar 2009
    Posts
    3,246
    Location
    Kansas
    Tractor
    YM3810D Yanmar

    Default Re: slip clutch vs. overrunning clutch?

    Yup been covered pretty well so far!

    Fwtw obviously a slip clutch is preferable to shear pins in that type applications that require something to "give" you are still in the game.

Similar Threads

  1. Rotary Cutter Neapco shaft & slip clutch on Woods MD184
    By bigsnowdog in forum Attachments
    Replies: 3
    Last Post: 06-02-2010, 10:09 PM
  2. Installation of overrunning clutch
    By rccoyote in forum Yanmar
    Replies: 9
    Last Post: 06-24-2003, 10:13 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2013 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.