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  1. #1
    Silver Member
    Join Date
    Dec 2006
    Posts
    187

    Default County Line shear bolts

    Last year I bought a County Line (TSC). I just got around to using it this weekend. A neighbor had his mailbox pole demolished by vandals (another thread)and asked to use it. I said OK but only if I go with it. We had to put it together (a little) and found that they had given me the wrong bolts and no shear bolts. The manual said to use 5/16 grade 5 shear bolts. I tried that size and found that the bolt was a little small for the hole. It was 3/8 which fit easily and had no "play". I was afraid that the 5/16 would cause the hole to elongate (become oval) under torque. I used a 3/8 grade 2 bolt and all went well but it was only one hole. Do you think the manual had a misprint or should I have used a 5/16 grade 5? I have several holes to drill and want to use the correct shear bolt.

    Norm

  2. #2
    Member
    Join Date
    Dec 2010
    Posts
    31
    Location
    Shawano WI
    Tractor
    NH Workmaster 55

    Default Re: County Line shear bolts

    You will do no harm by using grade 2 instead of grade 5. If you find that you are shearing them too often, you might consider going back to grade 5, but I might just stay with grade 2.

    As for size, sounds like 3/8 fits best. I'd keep using them

  3. #3
    Silver Member
    Join Date
    Dec 2006
    Posts
    187

    Default Re: County Line shear bolts

    Mogwai,
    Thanks for the reply.

    Norm

  4. #4
    Silver Member KennK's Avatar
    Join Date
    May 2006
    Posts
    143
    Location
    NE Illinois

    Default Re: County Line shear bolts

    Just for further understanding ... Is a Grade 2 bolt "softer" (more likely to shear) than a Grade 5 bolt?

    Thanks!
    JD 3320; 300CX FEL; Pat's Easy Change; JD 60" 7-Iron MMM; Frontier MS1105G ground-driven manure spreader; Worksaver UB-745 7' rear blade, Land Pride broadcast spreader, Flexpoint hitch receiver ... oh, and a little JD 125 for the DW

  5. #5
    Platinum Member MESSMAKER's Avatar
    Join Date
    May 2009
    Posts
    872
    Location
    Bluegrass,KY
    Tractor
    Bobcat ct 225

    Default Re: County Line shear bolts

    yes
    I always use grade 2

  6. #6
    Elite Member gwdixon's Avatar
    Join Date
    Jul 2009
    Posts
    2,508
    Location
    Northern CA

    Default Re: County Line shear bolts

    Have to agree with the above responders. Grade 2 bolts are cheap and good insurance. A 5/16" Grade 2 would pretty much guarantee that the bolt would go before the implement vitals. (I'm assuming you are using a PHD since it was not mentioned but it sounds like the job is one for it.)

    Odd about the size. I don't have specific data but 3/8" Grade 2 may have a similar shear threshold as 5/16" Grade 5. Use it with caution.

    At any rate, using 3/8" Grade 5 would likely void any warranty. If you really want to use 3/8" be sure it is Grade 2
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