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 05-16-08, 09:43 AM   #1
krems81
Senior Member
Thread Starter
 
Join Date: Apr 2008
Location: Chicago, IL
Bikes: Vintage Miele
Posts: 714
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Did I buy the right bearings?

I bought quantities of loose ball bearings (200 @ 1/4", 100 @ 3/16") for repairs, and I'm not sure if I bought the right ones. I went to McMaster Carr and bought alloy steel chrome finish, grade 25 bearings. Here's the link to the page: http://www.mcmaster.com/nav/enter.asp?pagenum=1124.

Looking at that page, I bought the E52100 Alloy Steel bearings.

Is this the right thing? If not, where can I go to find it?

Thanks for your help,
Brian
krems81 is offline   Reply With Quote
Old 05-16-08, 10:24 AM   #2
forensicchemist
40 something and counting
 
forensicchemist's Avatar
 
Join Date: Nov 2004
Location: dallas/ft.worth texas
Bikes: Colnago,Tsunami, Kestrel, Univega
Posts: 421
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
what are you trying to repair? Specifically, wheels, headset, bottom bracket? And which model?
forensicchemist is offline   Reply With Quote
Old 05-16-08, 11:04 AM   #3
tellyho
Your mom
 
Join Date: Aug 2006
Bikes:
Posts: 2,541
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The sizes are ones you will use. I can't remember off the top of my head, but I'm pretty sure 1/4 is bottom brackets (and possibly rear hubs). 3/16 is front hubs. I think. You can find the numbers on the web, although surprisingly not on Sheldon's site, at least as far as I've found. Those prices are pretty good for grade 25. I usually get mine from bikepartsetc.

See Harris' site for sizes and most common uses.
tellyho is offline   Reply With Quote
Old 05-16-08, 01:30 PM   #4
yngwie
Senior Member
 
Join Date: Mar 2008
Bikes:
Posts: 64
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
yup you got the sizes right...grade 25
just got my 2nd batch today....of 1/4" and 3/16"
1/4" for rear hubs
and 3/16" for front hubs
yngwie is offline   Reply With Quote
Old 05-19-08, 08:40 AM   #5
krems81
Senior Member
Thread Starter
 
Join Date: Apr 2008
Location: Chicago, IL
Bikes: Vintage Miele
Posts: 714
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Here's the thing. They're alloy steel. I was told chrome steel are the ones to use. They're chrome coated, but they're a duller hue, and not as shiny as the ones I've used before. Am I looking at any problems with thse alloy steel bearings?
krems81 is offline   Reply With Quote
Old 05-19-08, 10:44 AM   #6
buzzybelmondo
Senior Member
 
Join Date: Nov 2006
Bikes:
Posts: 136
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by krems81 View Post
Here's the thing. They're alloy steel. I was told chrome steel are the ones to use. They're chrome coated, but they're a duller hue, and not as shiny as the ones I've used before. Am I looking at any problems with thse alloy steel bearings?
chrome steel is an alloy
buzzybelmondo is offline   Reply With Quote
Old 05-19-08, 10:53 AM   #7
cudak888 
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Bikes: http://www.theheadbadge.com
Posts: 22,744
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Sounds like zinc plated bearing balls to me.

-Kurt
__________________
cudak888 is offline   Reply With Quote
Old 05-22-08, 10:53 PM   #8
krems81
Senior Member
Thread Starter
 
Join Date: Apr 2008
Location: Chicago, IL
Bikes: Vintage Miele
Posts: 714
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Zinc, eh? I know chrome steel is an alloy, but these bearing are termed "alloy steel," and described as "chrome-finished." They're not the bright, shiny chrome bearings we're all used to. I'm pretty sure they're not the ideal (or the standard) for bicycles. I'm just wondering if anyone has any further insight.

Last edited by krems81; 05-22-08 at 11:10 PM.
krems81 is offline   Reply With Quote
Old 05-23-08, 01:44 PM   #9
JBD
French Warmonger
 
JBD's Avatar
 
Join Date: Mar 2006
Location: Greetings from Michigan The Great Lake State
Bikes: Lyon Follis, raleigh sportif, giant unknown, centurian lemans r.i.p.
Posts: 350
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
the chromed alloy is cheaper and harder(?) at grade 25
the stainless is more expensive and softer(?) by a rockwell of 2 and are a better grade (24)

so, I'm curious if the additional ten-thousandth of an inch is really worth anything, if the softness of either is not suitable for our purposes, and most importantly if it is really important to use, with all else equal (knowing that in this case it doesn't hold) if there is any reason to use chrome over stainless or the other way around.
JBD 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 10:53 PM.