Retrobike Forum Index

It is currently Wed Dec 07, 2016 3:58 pm

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 14 posts ]  Go to page 1, 2  Next
Author Message
PostPosted: Sat Jun 01, 2013 8:36 pm 
Old School Hero

Joined: Sun Sep 16, 2012 9:54 pm
Posts: 241
I'm going to be replacing the cheap-as-chips headset which came fitted to my Raleigh Gran Sport frame and forks with a Campag record pista. I went to fit the fork race, expecting an interference fit involving a pipe and a hammer, but instead I find that the fork race slips into place with no interference at all.

Photo of the bare fork:

Image

Photo of the race fitted:

Image

I wouldn't describe the fit as loose, there is a tiny bit of play but this isn't what I expected. So:

- should I be worried about this? Would the race rotate against the fork instead of the bearing against the race?

- if so, what should I do? Glue? Shim? Or something else?


Top
 Profile  
 
PostPosted: Sat Jun 01, 2013 9:11 pm 
Old School Grand Master
User avatar

Joined: Fri Oct 14, 2011 8:41 pm
Posts: 8236
Location: Cumbria
BITD we would go around the fork race area with a punch raising up small mounds of metal around each punch mark...about 3mm apart. then try it on :)

Shaun


Top
 Profile  
 
PostPosted: Sat Jun 01, 2013 9:12 pm 
Old School Hero

Joined: Sun Sep 16, 2012 9:54 pm
Posts: 241
Midlife wrote:
BITD we would go around the fork race area with a punch raising up small mounds of metal around each punch mark...about 3mm apart. then try it on :)

Shaun


really? :shock:


Top
 Profile  
 
PostPosted: Sat Jun 01, 2013 9:51 pm 
Retro Guru
User avatar

Joined: Sun Mar 17, 2013 10:25 pm
Posts: 1262
GazK wrote:
Midlife wrote:
BITD we would go around the fork race area with a punch raising up small mounds of metal around each punch mark...about 3mm apart. then try it on :)

Shaun


really? :shock:



Common practise in the motor trade when wheel bearing races slip


Top
 Profile  
 
PostPosted: Sat Jun 01, 2013 10:10 pm 
Old School Grand Master
User avatar

Joined: Fri Oct 14, 2011 8:41 pm
Posts: 8236
Location: Cumbria
PM Old Ned or Keithglos on here and they will say that's what we did back then......I guess Google might show up a pic?

Have you got a couple of extra spacers because the Pista headset has quite a low stack height :)

Shaun


Top
 Profile  
 
PostPosted: Sat Jun 01, 2013 10:25 pm 
Retro Guru

Joined: Sun Aug 22, 2010 7:07 pm
Posts: 1321
Location: Cotswolds
Shaun, exactly what we did in the 1950's -1960's.
We just had to make things work when they were not made close to standard.
There is less weight on the bottom head race than you think.
Not unknown to fit a shim when the gap was larger.
Keith


Top
 Profile  
 
PostPosted: Sat Jun 01, 2013 10:53 pm 
Old School Hero

Joined: Sun Sep 16, 2012 9:54 pm
Posts: 241
Midlife wrote:
PM Old Ned or Keithglos on here and they will say that's what we did back then......I guess Google might show up a pic?

Have you got a couple of extra spacers because the Pista headset has quite a low stack height :)

Shaun


My fork has quite a low stack height. It originally had a gran sport headset, which is 33mm.


Top
 Profile  
 
PostPosted: Sat Jun 01, 2013 10:55 pm 
Old School Hero

Joined: Sun Sep 16, 2012 9:54 pm
Posts: 241
Thanks guys. I think I'll start by making a shim from a coke can. If that is too thick I'll go down the punch route. Scary!


Top
 Profile  
 
PostPosted: Sat Jun 29, 2013 1:16 pm 
Old School Hero

Joined: Sun Sep 16, 2012 9:54 pm
Posts: 241
The punch technique worked a treat, thanks everyone.


Top
 Profile  
 
PostPosted: Sat Jun 29, 2013 3:50 pm 
Old School Grand Master
User avatar

Joined: Sat Oct 06, 2012 5:17 pm
Posts: 3775
Location: Norn Iron
Gaz,

I was wondering if you took any pics of the job being done?

Richard


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 14 posts ]  Go to page 1, 2  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: Frizzaldo, keithglos, kingbling, larrytx01, sodejuzeg, Tgb55 and 31 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

About Us

Follow Retrobike

Other cool stuff

All content © 2005-2015 Retrobike unless otherwise stated.
Cookies Policy.
bikedeals - the best bike deals in one place
FatCOGS - Fat Chance Owner's Group

Powered by phpBB® Forum Software © phpBB Group