Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 02-13-12, 09:44 PM   #1
kevmk81 
Senior Member
Thread Starter
 
kevmk81's Avatar
 
Join Date: Feb 2007
Location: Springfield, IL
Bikes: Trek 1500, Cannondale CAAD10
Posts: 504
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
another question - will bearings 'splay' out in a race when compressed?

When you compress a threaded headset using loose ball bearings, will the bearings compress out correctly - along the edges of the race, or is there a chance the bearings might 'double up', and not all of them be along the edge of the race? I can just picture it now, going down a hill and suddenly the fork becomes loose because the bearing moved where it's supposed to be. :-O
kevmk81 is offline   Reply With Quote
Old 02-13-12, 09:49 PM   #2
Bill Kapaun
Senior Member
 
Bill Kapaun's Avatar
 
Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Bikes: 86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.
Posts: 9,267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 46 Post(s)
Both sides of the bearing are held by the radius of the race.
As long as things are "snugged up" properly, the bearing(s) can't move. (That doesn't mean TIGHT)
Bill Kapaun is offline   Reply With Quote
Old 02-13-12, 10:16 PM   #3
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
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
Posts: 29,660
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 217 Post(s)
The two races are curved such that the balls are driven to the designed track line on both parts. That's why one is sort of a cone, and the other a cup. If you can't imagine this, pick up a pong pong, golf, or any ball of similar size. Cup both hands slightly and press your hands together with the ball between them. It'll e driven to the center and trapped there. That's how the hearing races use curvature to trap the balls in desired tracks.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“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.
FBinNY is offline   Reply With Quote
Old 02-14-12, 09:46 AM   #4
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,844
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
If any of the balls "doubled up" and didn't fall into the track (which could happen only if you added too many balls) you would not be able to adjust the headset and the steering would bind and be obviously not correct right away.
HillRider is offline   Reply With Quote
Old 02-14-12, 10:39 AM   #5
bobotech
Senior Member
 
Join Date: Jan 2012
Location: Spokane, WA
Bikes: Specialized Sequoia Elite/Motobecane Fantom Cross Team Ti/'85 Trek 520
Posts: 2,253
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
I imagine its better to have 1 too few balls than 1 too many balls when it comes to bearing installs.

Too many balls makes for a stiffy!
bobotech is offline   Reply With Quote
Old 02-14-12, 10:43 AM   #6
DCB0
Banned.
 
Join Date: Apr 2011
Bikes: CCM Torino 76
Posts: 937
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by bobotech View Post
I imagine its better to have 1 too few balls than 1 too many balls when it comes to bearing installs.

Too many balls makes for a stiffy!
LOL.

To avoid brearings falling out of place, use lots of grease to hold them up against the bearing track of the headset cup when assembling.

If a ball does somehow get misaligned, or you use too many, you will notice immediately upon trying to adjust.
DCB0 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 04:51 AM.