Retrobike Forum Index

It is currently Mon Jul 13, 2020 12:31 am

* Login   * Register * Search  * FAQ

Forum rules


**Classified Rules & Guidance - Feedback - Dispute Procedure - Gold Trader Status - All Adverts Need A Price - 5 Adverts Maximum - Leave Prices In Sold Adverts - No cross posting adverts**



Post new topic Reply to topic  [ 7 posts ] 
Author Message
PostPosted: Tue May 05, 2020 4:05 pm 
Old School Hero

Joined: Wed Sep 06, 2017 5:38 pm
Posts: 191
Before you chuck that bent/rusty Suntour mech into the bin, save the little Allen key nut and get in contact. I can turn it into money + happy people. :mrgreen:

Z


Top
 Profile  
 
PostPosted: Tue May 05, 2020 4:38 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 10055
Location: New Forest, UK
IIRC it's the same size thread as a V-brake pad socket nut.


Top
 Profile  
 
PostPosted: Tue May 05, 2020 4:41 pm 
Old School Hero

Joined: Wed Sep 06, 2017 5:38 pm
Posts: 191
That's useful information Hamster. Thanks!


Top
 Profile  
 
PostPosted: Wed May 06, 2020 3:39 pm 
Old School Hero

Joined: Wed Sep 06, 2017 5:38 pm
Posts: 191
Thanks to Hamster's top tip, I have a pair of cheapo V-brake pads on the way, though I'm still interested if anyone has the Suntour part as it will save me breaking all my drill bits modifying a bolt to accept the cable through it. I do have one original bolt to copy, but have 2 mechs that need them.


Top
 Profile  
 
PostPosted: Sun May 10, 2020 10:00 am 
Old School Hero

Joined: Wed Sep 06, 2017 5:38 pm
Posts: 191
Turns out cheapo V-brake pads are M6 thread whereas the Suntour bolt is smaller. Will get the thread gauges out at some point and find out the spec. Should have done this first.
It may be possible to adapt the brake pad parts at a pinch. A pinch. Geddit? :D


Top
 Profile  
 
PostPosted: Mon May 18, 2020 10:19 am 
Old School Hero

Joined: Wed Sep 06, 2017 5:38 pm
Posts: 191
The original part is M5 x 0.8 - the same as a Weinmann brake pinch bolt. This may be my new starting point along with some M5 threaded connectors.
Unless I turn up an original Suntour part (still wanted if you have one), I'll let you know how I get on...


Top
 Profile  
 
PostPosted: Fri May 29, 2020 11:52 am 
Old School Hero

Joined: Wed Sep 06, 2017 5:38 pm
Posts: 191
Well I have a solution, but since I'd still like to compare it with the real thing, I'll leave this thread open.

The solution is to use M5 threaded wood inserts as found here https://www.ebay.co.uk/itm/M5-M6-WOOD-I ... 2749.l2649 and then carefully grind off the outer spiral thread with the bench grinder. A little shortening is also required (from the internally threaded end - the hex is pretty shallow) but the result is spot on and works like a dream.
I also modified a Weinmann pinch bolt with the bench grinder to copy the pattern of the one Suntour one that I have. This is a little more tricky since the Suntour bolt is threaded further down the shank than the Weinman, leaving not a great deal for the nut to hang on to. To help matters, I added a small washer on the outboard side, that allowed me to leave the bolt with a little more length than the original part - at the expense of a little aerodynamic advantage where the nut sits a little higher up.
If anyone needs to follow the same route get in touch as I have a scribbled sketch with the critical dimensions.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: Jerome and 29 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