Hello!
With my newly acquired Makita HR2610, I've drilled two 10 mm holes, 50-60 mm deep, where I then knocked in a couple of concrete anchors of the type FBN II 10/10. On these, I've mounted rings which via a sturdy chain hold a bar that I will be using for training. Since each FBN II 10/10 should handle several hundred kg, I should feel completely calm, but I want both belt and braces, so I'm double-checking here to ensure I'm not thinking wrong.
I weigh just over 80 kg, but when training with such a bar (pull-up bar, for doing pull-ups), you can also swing a bit, which obviously increases the load.
The house is modern, and I perceive the concrete as very strong. Admittedly, it was very easy to drill with my new Makita, but with the cheap hammer drill I've used previously, it was significantly tougher.
When I knocked in one of the concrete anchors, I unfortunately managed to damage the thread a little bit at the end, which made it a bit tougher to screw in the ring, so the anchor started to rotate a little. Is this something to worry about? Is there something that can be filled in afterward to lock it permanently?
I should say that I've hung with my full weight on both rings individually, and they seem to be rock solid (except that one can actually rotate a bit). But as I said, I want to feel completely secure.
