In this video, I demonstrate the process of removing a broken off steel bolt into an aluminum base using a TIG welder. I've used this process many times with great success.
Yes, dimension wise, it’s the same as a Shimano hollow tech II bottom bracket. I’ve currently got a new Shimano road bottom bracket with FSA cranks on my computer bike. Thanks for the question Denis!
@@JoeyMesa The cranks on my friend’s bike use an axle smaller than the 24mm of an Hollowtech II bb (19mm?) Are there adapters? Thank you for helping an amateur mechanic Joey!
Sort of. The welding rod is ER70s, which is steel. The welder is set to direct current, which is the biggest factor. It will only weld or fuse the steel bolt to whatever steel is welded to it.
@@JoeyMesa i get it now. sorry, you said so in the video but i didn't accept it right away. it is right. the aluminium oxide layer has a melting temperature of 2100 °C/3800 °F and the steel melts between 1300-1540°C/2370-2800°F. the material under the oxide layer might even melt at a much lower temperature than the steel does, but the thin oxide layer that doesn't get cleaned off while welding with direct current keeps it from sticking to anything even if it does melt. you could intentionally break it by jamming the rod underneath the oxide layer, leaving you with a "lumpy mess that doesn't flow well doesn't wet out well and seems to fight you every step of the way" (video 6DnA6YLhAno) at least this is my understanding now, it might still be faulty, grain of salt, i don't weld yet, etc. but i thought it might be interesting enough to type all that. it was for me
