It is currently Sun Oct 22, 2017 3:57 am Advanced search

Bicycle crank repair

General welding questions that dont fit in TIG, MIG, Stick, or Certification etc.

Re: Bicycle crank repair

Postby exnailpounder » Sat Mar 04, 2017 9:47 am

AndersK wrote:
exnailpounder wrote:The left side has reverse threads :lol:

Yeah, I got it wrong. Stand corrected in shame :oops: :lol:

I haven't worked on a bicycle since I was a kid so I have no idea what the hell I am talking about :lol:
Ifyoucantellmewhatthissaysiwillbuyyouabeer.
exnailpounder
Weldmonger
 
Posts: 2461
Joined: Thu Dec 25, 2014 9:25 am
Location: near Chicago

Re: Bicycle crank repair

Postby tonij » Mon Mar 06, 2017 8:16 am

Lots of cranks these days are 7075 alloy...
User avatar
tonij
Active Member
 
Posts: 25
Joined: Sun Dec 25, 2016 10:45 pm
Location: Melbourne, Australia

Re: Bicycle crank repair

Postby paul_s » Fri Apr 14, 2017 2:14 pm

Thanks everyone for your replies to this thread. I wound up returning the bike to my neighbor. It was going to be a free job and I prefer not to do jobs if I can't do them right. Finding and sourcing tools and supplies turned out to be too expensive, and my neighbor did not want me spending too much on this. Getting new cranks seems the way to go for around $50 and I'll let my neighbor decide if he wants to spend the money.
Welpro SuperTIG 180P
paul_s
Ace
 
Posts: 209
Joined: Thu Feb 06, 2014 10:04 pm

Re: Bicycle crank repair

Postby Olivero » Fri Apr 14, 2017 6:23 pm

Well, that's all fair and square I guess but when it comes to rethreading stuff by welding it back up and then retapping it, I have used pretty much any alloy I have on the shelf, I pick the "stronger" one of what I got and usually that does the trick, never worried about the alloy too much.
if there's a welder, there's a way
User avatar
Olivero
Ace
 
Posts: 386
Joined: Tue Dec 13, 2016 9:24 pm
Location: Clearwater Florida

Re: Bicycle crank repair

Postby Otto Nobedder » Fri Apr 14, 2017 7:26 pm

tonij wrote:Lots of cranks these days are 7075 alloy...


Lots of cranks these days vent their frustrations on facebook.

:lol:

Steve S
User avatar
Otto Nobedder
Weldmonger
 
Posts: 8391
Joined: Thu Jan 06, 2011 11:40 pm
Location: Near New Orleans

Previous

Return to Welding Forum General Shop Talk

cron