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  1. #1
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    Default shear pins

    went to tractor supply and one other farm supply store to buy shear pins for my bushog and they both said to use 7/16 or 1/2 number two bolts as shear pins. old pins were shear pins with a grove in them to break under pressure. Will #2 bolts shear as easily- 7/6 or 1/2 inch #2 bolts seem pretty substantial
    and i really not interested in tearing anything up=neither store carried "shear pins".

  2. #2
    Veteran Member carpenter383's Avatar
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    Dec 2008
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    Indiana
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    Kioti DK40SE

    Default Re: shear pins

    #2 bolts aren't a very strong grade. I broke a shear pin on a bushog, and replaced it with a grade 5 bolt. Broke that bolt so I used a grade 8, and broke it too! The tractor was a tc30 running a 6ft bushog in tall grass and thorns (all it wanted) Still not sure if something was wrong with the bushog or what caused the repeated pin/bolt breakage (not my tractor)
    I wouldn't be worried about a grade 2 bolt being too tough to use as a shear pin.
    “History fails to record a single precedent in which nations subject to moral decay have not passed into political and economic decline. There has been either a spiritual awakening to overcome the moral lapse, or a progressive deterioration leading to ultimate national disaster.” Douglas MacArthur
    "The obligation of every human being to God, is higher than his duty to country, and not even a majority in society has the legitimate right to interfere with a man's allegiance to him."James Madison

  3. #3
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    Default Re: shear pins

    Quote Originally Posted by carpenter383 View Post
    #2 bolts aren't a very strong grade. I broke a shear pin on a bushog, and replaced it with a grade 5 bolt. Broke that bolt so I used a grade 8, and broke it too! The tractor was a tc30 running a 6ft bushog in tall grass and thorns (all it wanted) Still not sure if something was wrong with the bushog or what caused the repeated pin/bolt breakage (not my tractor)
    I wouldn't be worried about a grade 2 bolt being too tough to use as a shear pin.
    thanks for the input carpenter383- is half inch to big or should i stay with 7/16

  4. #4
    Silver Member
    Join Date
    Dec 2007
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    201
    Location
    Johnstown, Pa
    Tractor
    MF GC 2300

    Default Re: shear pins

    I picked up a 3pt snow blower a week ago. I knew I was going to go through a bunch of shear bolts so I wanted to stock up. My manual made reference to #2 grade bolts
    Who is John Galt

  5. #5
    Veteran Member scesnick's Avatar
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    Sep 2004
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    Garrett County Md. ( Western Md.)
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    Kubota MX5100

    Default Re: shear pins

    Quote Originally Posted by 75H2 View Post
    I picked up a 3pt snow blower a week ago. I knew I was going to go through a bunch of shear bolts so I wanted to stock up. My manual made reference to #2 grade bolts
    You better buy them by the bagful.. I run only grade 8 bolts and I still break plenty of them.
    Father, GNCC racer, KTM rider, Bow hunter, Farm owner.
    Kubota MX5100
    Dodge 2500 CTD
    Yamaha YZ 250

  6. #6
    Veteran Member carpenter383's Avatar
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    Indiana
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    Kioti DK40SE

    Default Re: shear pins

    Quote Originally Posted by jimbo64 View Post
    thanks for the input carpenter383- is half inch to big or should i stay with 7/16
    I would use a 1/2 in bolt if thats what it takes to fit the hole tightly. You don't want to have slop in the holes where the bolt goes through.
    “History fails to record a single precedent in which nations subject to moral decay have not passed into political and economic decline. There has been either a spiritual awakening to overcome the moral lapse, or a progressive deterioration leading to ultimate national disaster.” Douglas MacArthur
    "The obligation of every human being to God, is higher than his duty to country, and not even a majority in society has the legitimate right to interfere with a man's allegiance to him."James Madison

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