I modified the bolt buster tension tester to test how much force the YABR (Yet Another Bolt Remover) can generate and it's a lot. It broke the bolt but I was twisting hard at 23.82kN or 5,354lbf! This is why you have to score, or aggressively spin, a bolt before pulling so the wedge doesn't get engaged because this can generate enough force to snap the bolt and make your existing hole unusable.
So this is a bolt remover if there is a bad climbing bolt and it has to be pulled out.
Now there's a couple steps involved but what's really neat about this is you attach this to
the bolt and you can just spin this and it'll extract it. Now I'll show you like the components
of this in a minute but we have our bolt luster table here and what it is I installed a bolt in
I put this on top I've got a washer on here an all thread thing a funky hanger and a line scale
in order to measure how much force this even generates. It's just kind of nice to know when
you're like pulling on stuff to see like how much force is taking to actually remove the bolt.
Now it's really important to score the wedge and the cone the sleeve all at the bottom of the hole
before you try to pull it up because I do think this is going to generate maybe 15 or 20
kilonewtons and especially with 3.8s what happens is you end up stretching the bolt so much that
you end up snapping the head off leaving the stud inside the hole and you can't reuse the hole
which that's the goal if you're trying to remove the bolt. So what you do is you end up spinning
it with a drill or a hand thing in order to cut a groove between that sleeve and the cone at the
in order for them to come up together that way they don't engage. Now I didn't attach
normal to a bolt obviously because I'm trying to just pull up on it and this is a long wedge
bolt in this limestone and we have the quick link to the soft shackle to the line scale to a soft
shackle to a bonier really awesome hanger to a coupler to an all thread and I'll show you what's
there in a minute crushing rocks what are we at 8.5 at 8.5 I'm still able to move this pretty well
that's a full another turn it's 11.5 was one full turn 14.6 go bolt
17 now this isn't always going to be your results because the hanger is stretching
you're not going to have this attached to a hanger 20 oh my god and I can still turn it
18 is the mvs of that rock all right we're at 21 again
ah go check out the bolt down there around 0.1 film it from this side I'm right here
that bolt is coming out and I'm getting I got what 21 thing wants to unspin on me but nope
2022 I think was our peak let's uh let's go peak
I woke up 15 minutes ago and now I'm like really awake
my heart's going hold on 23.82 uh I don't really want to take this much higher at 30 the screen
stops working but wow the looks like the hanger came off nope it did exactly what I was saying
it uh stretched the bolt and broke it that's impressive I believe fix sells these now um
Greg German uh made them and he I think shares what components are in this Bobby has tried to
make his own um it's kind of hard to get the thrust washers to like basically to get this
thing to spin under a lot of pressure but this thing is actually really good it's really been
great so let's unscrew this all thread so this is a coupler it's just a tall nut with uh female
ends on both sides and this is what the yabber has yet another bolt remover
we'll stick this out here has that in there so it's um doesn't so if it's all the way out
see it wants to spin it has a nut right there it's not engaged it spins but if I can get it to stay
then it just pulls and extracts half inch by 20 that's fine thread and I happen to have this
coupler here that was fine thread on one side and coarse thread on the other and that's how I was
able to get the the all thread on there so you would just get a coupler that would match the
bolt you're trying to take out so you can go from half inch to three eights or whatever but you
definitely want to score stuff you don't want to snap the bolts and leave it in the hole but this
is a great tool if you're trying to remove stuff this is a little bit arched and that helps if you
have uneven rock and there's a little clip here so you don't drop your tool in case you're doing
this in the vertical world and this unscrews so it packs down really well so that's just a quick
video on how strong one of these are the whole bolting bible has how to remove bolts and more
tools that you could even use but um I've been wanting to do this test for a while and we were
out here at this mine testing a whole bunch of bolts now the bolt buster table so there you go
thanks for watching