Bottom Bracket Binding?
09-15-15, 08:33 PM
#1
Full Member
Thread Starter
Join Date: Aug 2015
Location: Metro West, Boston
Posts: 364
Bikes: 75 Raleigh Gran Sport, 88 Bridgestone RB3, 72 Raleigh Super Course, 75 Jeunet 620, 95 Fuji Team
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 80 Post(s)
Likes: 0
Liked 21 Times
in
12 Posts
Bottom Bracket Binding?
I installed a bottom bracket and crankset on my build, and I'm having an issue with play vs. binding.
When I adjust the cup so the cranks spin freely with no binding, there is play in the crank arms and I
can wiggle them back and forth. When I tighten up the cup to get rid of the play the cranks bind.
Does this sound like the bottom bracket is too long? What should I look for here?
I'm going to have to disassemble this, but thought I 'd ask for some guidance first.
Thanks
When I adjust the cup so the cranks spin freely with no binding, there is play in the crank arms and I
can wiggle them back and forth. When I tighten up the cup to get rid of the play the cranks bind.
Does this sound like the bottom bracket is too long? What should I look for here?
I'm going to have to disassemble this, but thought I 'd ask for some guidance first.
Thanks
09-15-15, 08:48 PM
#2
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,647
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 140 Post(s)
Tagged: 1 Thread(s)
Quoted: 5756 Post(s)
Liked 2,524 Times
in
1,395 Posts
Need to much more before anyone can give you an answer.
Specific detail about the type of BB, down to brand and model and the frame interface, ie. threaded, BB30 or whatever.
There's a chance that it's normal seal drag, or it could be something complicated like an alignment issue.
So, please details, details & more details.
Specific detail about the type of BB, down to brand and model and the frame interface, ie. threaded, BB30 or whatever.
There's a chance that it's normal seal drag, or it could be something complicated like an alignment issue.
So, please details, details & more details.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
09-15-15, 09:11 PM
#3
Full Member
Thread Starter
Join Date: Aug 2015
Location: Metro West, Boston
Posts: 364
Bikes: 75 Raleigh Gran Sport, 88 Bridgestone RB3, 72 Raleigh Super Course, 75 Jeunet 620, 95 Fuji Team
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 80 Post(s)
Likes: 0
Liked 21 Times
in
12 Posts
It is an SR Royal BB that was originally in a Raleigh Competition. It was made in 1977. I have the bottom bracket and original cranks that went with it. I'm installing it in a 1972 Raleigh Super Course. Standard 24TPI English threading. The BB Shell width on the Super Course is 67.3 mm and the axle length of the SR Royal is 112 mm. The Chain line seems fine as far as I can tell.
09-15-15, 09:20 PM
#4
Senior Member
Join Date: Feb 2004
Location: Sacramento
Posts: 379
Bikes: SR, Bianchi, Raleigh, Bertin, Kona, Schwinn, Eisentraut, Zunow, Columbine, Naked, Nishiki, Phillips, Specialized, Giant
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
bearings with cages installed backwards?
just taking a wild guess...
just taking a wild guess...
09-15-15, 09:20 PM
#5
Mechanic/Tourist
If you are using caged bearings make sure they are oriented correctly. If using loose balls make sure you have the right size and count (1/4" and 11 balls each side. Also make sure the cups and cones are not pitted or unevenly worn. Normally a poorly faced BB shell could be a cause, but unlikely on an old frame, as it would have shown up before this point.
09-15-15, 09:44 PM
#6
Full Member
Thread Starter
Join Date: Aug 2015
Location: Metro West, Boston
Posts: 364
Bikes: 75 Raleigh Gran Sport, 88 Bridgestone RB3, 72 Raleigh Super Course, 75 Jeunet 620, 95 Fuji Team
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 80 Post(s)
Likes: 0
Liked 21 Times
in
12 Posts
09-15-15, 11:06 PM
#7
Full Member
Thread Starter
Join Date: Aug 2015
Location: Metro West, Boston
Posts: 364
Bikes: 75 Raleigh Gran Sport, 88 Bridgestone RB3, 72 Raleigh Super Course, 75 Jeunet 620, 95 Fuji Team
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 80 Post(s)
Likes: 0
Liked 21 Times
in
12 Posts
That was it. I installed them backwards and didn't even notice. Working too late at night on this project... Thanks
09-16-15, 08:40 AM
#8
Senior Member
Join Date: Feb 2004
Location: Sacramento
Posts: 379
Bikes: SR, Bianchi, Raleigh, Bertin, Kona, Schwinn, Eisentraut, Zunow, Columbine, Naked, Nishiki, Phillips, Specialized, Giant
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
i like happy endings!
09-16-15, 01:39 PM
#9
Senior Member
Join Date: May 2005
Location: La La Land (We love it!)
Posts: 6,301
Bikes: Gilmour road, Curtlo road; both steel (of course)
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 273 Post(s)
Likes: 0
Liked 10 Times
in
9 Posts
__________________
Today, I believe my jurisdiction ends here...
Today, I believe my jurisdiction ends here...
Thread
Thread Starter
Forum
Replies
Last Post
Zephboii
Singlespeed & Fixed Gear
4
08-29-19 12:15 PM
Tristanh666
Bicycle Mechanics
10
12-29-11 03:18 PM
