Aluminum Specialized Bicycle Seat Post Clamp Repair (TIG weld)

[undercut]

I TIG weld repaired a broken seat post clamp for a pretty high end Specialized Road bike.

It failed from overtightening. The owner's manual only calls for something like 4 foot-pounds.

Nice job! That clamp sure didn't have much meat to it. No wonder it failed. Amazing you were able to keep the arc going with so little amperage. Amazing machine in the hands of a good welder. Cheers!

[DaveO]

Yowza, nice work as usual. I wonder if the guy bought the wrong size seat post, a shade too small, and thought he could crank down on the clamp to compensate.

[Slartybartfa]

Sometimes a little chalk dust rubbed on the mating parts can minimize slippage, and the tendency to overtighten.

[SeanMurphy265]

I use to ride a Specialized mtn bike until it was stolen.... That's not a good design I would have problem with mine getting loose after a long ride. That aggravating part is the seat height has everything to do with comfort on the bike. I was tempted to drill a hole and run a pin through my seat post.