Retrobike Forum Index

It is currently Tue Feb 18, 2020 7:12 am

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 8 posts ] 
Author Message
 Post subject: Claud butter eyelet size
PostPosted: Thu Dec 05, 2019 11:51 pm 
Dirt Disciple

Joined: Thu Dec 08, 2016 12:31 am
Posts: 21
Hi
I have a claud butler frame 60s/70s
I think it needs imperial bolts
What size bolt is needed for the rack Eyelets?
Cheers


Top
 Profile  
 
PostPosted: Fri Dec 06, 2019 1:20 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 9685
Location: New Forest, UK
Mudguard eyes etc were always BA bolts. I can't remember offhand which size.


Top
 Profile  
 
PostPosted: Fri Dec 06, 2019 2:18 pm 
Retro Guru

Joined: Sun Aug 22, 2010 7:07 pm
Posts: 1655
Location: Cotswolds
3/16 inch was it 54 tpi, 2ba will do but slightly smaller.

Keith


Top
 Profile  
 
 Post subject: Re:
PostPosted: Sat Dec 07, 2019 12:41 am 
Dirt Disciple

Joined: Thu Dec 08, 2016 12:31 am
Posts: 21
Cheers
Is 2ba the wrong size?
I couldn't find anything when I searched for 54 tpi
Sorry I don't know anything about imperial sizes


Top
 Profile  
 
PostPosted: Sat Dec 07, 2019 9:36 am 
Retro Guru

Joined: Sun Aug 22, 2010 7:07 pm
Posts: 1655
Location: Cotswolds
2BA is .185 inch diam and about 32 tpi, very slightly smaller than 3/16 inch, which was probably 32 tpi. brains in neutral sometimes now.
Keith


Top
 Profile  
 
 Post subject: Re:
PostPosted: Sat Dec 07, 2019 9:41 am 
King of the Skip Monkeys
King of the Skip Monkeys
User avatar

Joined: Wed Nov 07, 2007 4:34 pm
Posts: 31018
Location: Crayon-Munching-Fart-Muppet
When I had a similar problem:

Quote:
Thread is probably 2BA if a normal M5 thread is too tight in the hole. 2BA is about 4.7mm outside diameter, but with a pitch of 0.8mm, same as normal M5.
If the M5 is really loose in the hole but binds up eventually, the threads are most likely 1BA, so around 5.3mm OD, but this has a 0.9mm equivalent pitch.

All the best,


Top
 Profile  
 
 Post subject: Re:
PostPosted: Thu Feb 06, 2020 12:24 am 
Dirt Disciple

Joined: Thu Dec 08, 2016 12:31 am
Posts: 21
Sweet! Cheers


Top
 Profile  
 
PostPosted: Thu Feb 06, 2020 11:07 am 
Retro Guru

Joined: Sun Aug 22, 2010 7:07 pm
Posts: 1655
Location: Cotswolds
Not 2BA which is too small, but will work.
The screws we used were cheese head zinc plated 3/16 x 32 BSF. Not BA.

I get an occasional flash of real memory.

Keith


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 7 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