Stripped Bottom Bracket?
#1
Senior Member
Thread Starter
Join Date: Mar 2007
Posts: 365
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Stripped Bottom Bracket?
So I was turning the BB and I noticed everytime it got stuck, I forced it and it "jumps". This repeats every full turn I make but the BB does not go deeper. Have I stripped the BB? Is it useless now?
#2
Guest
Join Date: Jul 2008
Location: Grid Reference, SK
Posts: 3,768
Bikes: I never learned to ride a bike. It is my deepest shame.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 6 Times
in
6 Posts
Need more info.
Are you talking about spinning the bb SPINDLE and it is getting stuck, or are you talking about the threads on the cupos holding it into the frame.
THe only advice I will give is that you should never force the cups to turn... if you can not thread it all the way in by hand (no tools) then something is wrong.
Are you talking about spinning the bb SPINDLE and it is getting stuck, or are you talking about the threads on the cupos holding it into the frame.
THe only advice I will give is that you should never force the cups to turn... if you can not thread it all the way in by hand (no tools) then something is wrong.
#3
Senior Member
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Posts: 12,257
Bikes: Bianchi, Miyata, Dahon, Rossin
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 5 Times
in
5 Posts
stripped threads?
a shop with a thread chasing tool should be able to fix your BB shell threads.
As for the BB itself, it's hard to know if it's stripped or not until you take a closer look at it.
a shop with a thread chasing tool should be able to fix your BB shell threads.
As for the BB itself, it's hard to know if it's stripped or not until you take a closer look at it.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
#4
Senior Member
Join Date: May 2005
Location: SFBay
Posts: 2,334
Bikes: n, I would like n+1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 127 Post(s)
Likes: 0
Liked 133 Times
in
108 Posts
You'll probably want a shop with a top to clean things up in there. Odds are you've stripped it. However, I've seen a couple cases with soft aluminum or plastic bottom bracket cups and steel frames where the frame turned out just fine.
#7
Senior Member
The BB's usually have steel shells so unless it's an external cup setup where they use aluminium bearing cups it's far more likely that the frame theads have been damaged. And given how loose some BB's are when threading into the frames this is entirely possible.
The sad part is that you can't put metal back on easily so the suggestions to have the threads chased isn't going to help. Chasing only helps restore damaged threads that were cross threaded. It won't do anything for threads where the crests have all been shaved off by a badly fitting BB body.
The sad part is that you can't put metal back on easily so the suggestions to have the threads chased isn't going to help. Chasing only helps restore damaged threads that were cross threaded. It won't do anything for threads where the crests have all been shaved off by a badly fitting BB body.
#8
Senior Member
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Posts: 12,257
Bikes: Bianchi, Miyata, Dahon, Rossin
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 5 Times
in
5 Posts
either way, it's best if the BB is faced, which requires chasing the threads, if installing a YST threadless BB.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm