Are Dirty Holes Bad For Mechanical Bolts???


We are supposed to clean holes we drill in rock before installing bolts. We already tested glue in bolts with epoxy and found it to be super strong enough. Now we are testing mechanical bolts in this video


Results: Our control and the three dirty holes all snapped the head of the bolt off showing the dust in the hole had no affect on the strength. Everything was above 30kn which is even higher than the climbtech hanger itself.


Conclusion: Please clean holes before installing bolts, but it's less of a big deal than we thought. Do quality work if you are installing something other people will depend their lives on!


1/2" dewalt power studs tested https://youtu.be/pQoVQzB5HTQ

Dirty holes with glue in episode https://youtu.be/69xBmU-6QQU

Wave bolts with dirty holes https://youtu.be/MZJt41pydos


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Breaking Gear Fear

Edutainment has been a great way to help people understand their gear, and know the true limitations of it.  Watching HOW gear fails is more important than the force itself, as almost all gear is super good enough.  It's more important to share information on how to stay safe than it is to have a paywall.  We hope our stoke is contagious.