I use the 'ol Torquestruct-o-matic 69 to break bolts. I learned:
Good Quality Grade 8 bolts can handle 200-250% rated torque.
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By AvvE

14 thoughts on “Boltr: bolts! how much torque before break?”
  1. Avataaar/Circle Created with python_avatars Brett Bret says:

    Since that wrench is only 8.5 inches at the point of pressure, your numbers would be off by 30%. Did you factor in the fact that the wrench was not 12 inches long at the point the pressure was applied?

  2. Avataaar/Circle Created with python_avatars Carter Thiessen says:

    Never heard of anyone replacing brake caliper bracket bolts, and if those break someone can definitely die. However they're usually quite skookum for the application. Often m12 or m14 fine thread and aren't torqued much past 80 ft lbs, or 4 to 5 ugga duggas.

  3. Avataaar/Circle Created with python_avatars Beardy says:

    @AvE How about a vid comparing different screw head types and the amount of torque they can take. Flat, phillips #2 or #3, torx, square, etc.

  4. Avataaar/Circle Created with python_avatars Roadrunner James says:

    🇸🇪

  5. Avataaar/Circle Created with python_avatars horseman1968 says:

    I never pictured you as a conch blower. How much bourbon does it take to get the taste out?

  6. Avataaar/Circle Created with python_avatars معن says:

    In topdrive system we torquing bolts up to 1200psi which is normal 😂

  7. Avataaar/Circle Created with python_avatars Mazter Z says:

    How much torque to strips threads?

  8. Avataaar/Circle Created with python_avatars luuk341 says:

    Is there a video on that there bolt Torquestructomatic 69 machine you built there?
    That is a hgdraulic torque wrench in there but it almost sounds like you are running it on an air system?
    I could very well be wrong on that though

  9. Avataaar/Circle Created with python_avatars FΛDΣ says:

    Uses the word conchoidal, missed opportunity for remarks about coitus…

  10. Avataaar/Circle Created with python_avatars Francois Brand says:

    Can u do a shear test on gr5 vs gr8 1/2 bolts? somehow with your fancy machines? wd settle quite a few arguments on the forums-

  11. Avataaar/Circle Created with python_avatars chickn greez says:

    I broke torque on my wife's ass last night💩😭💪

  12. Avataaar/Circle Created with python_avatars Jess Garza says:

    If a lug nut bolts were over torqued how many days or weeks before it breaks off?

  13. Avataaar/Circle Created with python_avatars Fee says:

    You should compare the strength of various classifications of bolts from harbor freight/Home Depot as compared to others, I’m very curious if the water cooler gossip about harbor freight and Home Depot bolts being inadequate for automotive use, especially like grade 8/class 10 & class 12 etc for horizontal weight bearing use like in transmissions

  14. Avataaar/Circle Created with python_avatars LeadAcidQuackery says:

    When you bust a nut, look for post-coital benchmarks and sheared lips. Got it.

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