Page 2 of 5 FirstFirst 1234 ... LastLast
Results 11 to 20 of 44

Thread: Caution! Treestuff Lag Bolt Breaks!

  1. #11
    Treehouser Cobleskill's Avatar
    Join Date
    Dec 2006
    Location
    Western New York near Lake Ontario
    Age
    60
    Posts
    3,269

    Default

    I have found that lag bolts break much easier than one would think they should, even before they became Chinese crap.

  2. #12
    TreeHouser kevin bingham's Avatar
    Join Date
    Nov 2010
    Posts
    1,587

    Default

    what diameter? what sized drill bit were you using? what kind of wood?

  3. #13
    TreeHouser candoarms's Avatar
    Join Date
    Apr 2013
    Location
    Cando, North Dakota, USA
    Posts
    556

    Default

    A lag bolt can generate tons of friction when being installed. I've seen large lag bolts broken off due to improper installation. The wood must be drilled out to about 3/4 of the diameter of the lag screw. Only the bolt's threads should make contact with the wood. Bolts should be lubricated with wax or soap prior to being installed. Lag bolts should be allowed to cool while installing them. Using a drill or an air gun will generate tremendous amounts of heat, causing the metal to weaken during installation.

    All lag bolts will break if installed improperly.

    Please refer to the following chart when installing lag bolts...and lubricate your lags.

    http://www.portlandbolt.com/technica...ole-diameters/

    Joel

  4. #14
    TreeHouser Sponsor August Hunicke's Avatar
    Join Date
    Feb 2013
    Location
    Oregon
    Posts
    2,389

    Default

    Glad I read that Joel!
    I didn't know the lube part!
    Makes sense.

  5. #15
    TreeHouser candoarms's Avatar
    Join Date
    Apr 2013
    Location
    Cando, North Dakota, USA
    Posts
    556

    Default

    August,

    You're very welcome, my friend.

    Years ago I was employed as a medical equipment repairman. Needless to say, installing an x-ray unit onto a wood-framed wall was something of a concern. Years of use can cause the lag screws to loosen in the wood. Proper installation is critical for patient and hospital staff safety. I've received many hours of classroom time on the proper use and installation of lag screws. I'm passing along the most important aspects of this information because nobody wants to sit through hours of classes discussing fastening / hardware failures.

    Joel

  6. #16
    TreeHouser Sponsor August Hunicke's Avatar
    Join Date
    Feb 2013
    Location
    Oregon
    Posts
    2,389

    Default

    Excellent. I've never broken one but I have been fighting them for years. Never knew this info. Soap in a fresh drilled tree ...sounds like I'd go with parafin maybe??
    Or olive oil perhaps.

  7. #17
    Patron saint of bore-cutters Sponsor stig's Avatar
    Join Date
    Aug 2007
    Location
    Denmark
    Age
    59
    Posts
    13,471

    Default

    Paraffin is good.
    That I what I use when I set fresh wood blanks up on a face plate for turning.
    Without lubrication the screws break when I try to screw them out of the turning blank again.

    That is never a problem when working dry blanks.
    Deyr f,
    deyja frndr,
    deyr sjlfr et sama;
    ek veit einn,
    at aldri deyr:
    dmr um dauan hvern.

  8. #18
    TreeHouser Jomo's Avatar
    Join Date
    Jan 2014
    Location
    San Diego
    Age
    57
    Posts
    31,504

    Default

    All of the termination hardware I've installed comes from Chicago, drop forged n galvanized stuff, pricey but worth every penny.

    Lags are only appropriate for use in hardwoods, never softwoods like conifers.

    Jomo

  9. #19
    unsanitized BlackSmith's Avatar
    Join Date
    Mar 2005
    Location
    Upnya WV
    Posts
    3,305

    Default

    I would've thought stainless was best in a tree but I'm no tree man.
    Molon Pepe

  10. #20
    TreeHouser Sponsor cory's Avatar
    Join Date
    Aug 2008
    Location
    CT
    Age
    59
    Posts
    14,096

    Default

    I would think that would be overkill. Good quality galvanized gets it done afaik.
    Mastery is an illusion, grace a momentary gift, apprenticeship endless.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •