Bikeguide.org - Bike maintenance for BMX'ers

The Street => The Bike Shop => Topic started by: JFax on March 09, 2015, 03:00:21 AM

Title: Fixing removable brake hardware
Post by: JFax on March 09, 2015, 03:00:21 AM

So I accidently tightened the tiny little bolt for the cable guide on my toptube and tore the threads out from the frame... The cable guide wouldnt sit firmly fixed, I felt like it had a slight wobble, hence the over tightening.
I tried fixing it with epoxy but it didnt really do the trick.

I guess I could try to re-thread the threads, but dont think it would be that stable, as the original already tore off. Any of you guys got a better trick to firmly fix the cable guides to the frame?

Title: Re: Fixing removable brake hardware
Post by: Dr. Steve Brule on March 09, 2015, 04:06:41 AM

Maybe a pop rivet?

Title: Re: Fixing removable brake hardware
Post by: Stoked on March 09, 2015, 07:14:23 AM

3m makes plastic adhesive guides that work great

Title: Re: Fixing removable brake hardware
Post by: tecnic1 on March 09, 2015, 09:04:33 AM

http://www.amazon.com/E-Z-SK40210-Threaded-Stainless-Installed/dp/B0092QUKRG/ref=pd_sim_sbs_auto_6?ie=UTF8&refRID=1PKRB4KWGTPMJQNNXS1T (http://www.amazon.com/E-Z-SK40210-Threaded-Stainless-Installed/dp/B0092QUKRG/ref=pd_sim_sbs_auto_6?ie=UTF8&refRID=1PKRB4KWGTPMJQNNXS1T)

I'm not sure that's the right size/thread pitch, but I CBA to look it up right now.

Title: Re: Fixing removable brake hardware
Post by: JFax on March 09, 2015, 11:36:39 AM

What is that? Helicoils? New threads you put in?

Title: Re: Fixing removable brake hardware
Post by: master on March 09, 2015, 11:48:59 AM

Came in to recommend a helicoil as well if the threads are pulled out completely.

Is this a cable guide (just holds the housing in place) or the cable stop (end of the housing and takes the braking force)?

Title: Re: Fixing removable brake hardware
Post by: JFax on March 09, 2015, 12:12:31 PM

Cable stop.

Title: Re: Fixing removable brake hardware
Post by: Dr. Steve Brule on March 09, 2015, 02:21:55 PM

Surely the tube won't be thick enough to helicoil. I stand by pop rivet.

Title: Re: Fixing removable brake hardware
Post by: master on March 09, 2015, 02:53:30 PM

At least on FBM made frames, the stop threads into a welded-in insert that has ~5-6mm of thread. That may be enough for a small helicoil.

Title: Re: Fixing removable brake hardware
Post by: JFax on March 09, 2015, 04:15:41 PM

Ive seen some good rivert uses in my day. If it can be done that is provably the way forward. I have no idea how to do it though. Prob ask at the bike shop. Thanks guys!

Title: Re: Fixing removable brake hardware
Post by: Spev on March 09, 2015, 04:17:42 PM

What kind of frame do you have?
You could simply tap a thread in the other hole and spin the stop around.

Title: Re: Fixing removable brake hardware
Post by: tecnic1 on March 09, 2015, 04:21:17 PM

Quote from: JFax on March 09, 2015, 11:36:39 AM

What is that? Helicoils? New threads you put in?

yeah, you drill and tap it to some larger size, then thread in an insert the original size.

S&M also uses a little welded in plate that is most likely thick enough to heli-coil.

Title: Re: Fixing removable brake hardware
Post by: Eggit2 on March 09, 2015, 08:49:21 PM

This is a pop rivet with built in threads for a water bottle cage. (http://"http://www.cycle-frames.com/bicycle-frame-tubing/NOVA-SS-REV-NUT-FOR-H2O-BOSS-FOR-ALUMINUM.html")
You may be able to track one down that is the right size for the cable stop screw.

Title: Re: Fixing removable brake hardware
Post by: G on March 10, 2015, 09:16:23 AM

Quote from: Eggit2 on March 09, 2015, 08:49:21 PM

This is a pop rivet with built in threads for a water bottle cage. (http://"http://www.cycle-frames.com/bicycle-frame-tubing/NOVA-SS-REV-NUT-FOR-H2O-BOSS-FOR-ALUMINUM.html")
You may be able to track one down that is the right size for the cable stop screw.

Link doesn't work for me but I came here to recommend a Riv-nut/nutsert too...
https://www.youtube.com/watch?v=sz2yZNqGNqo

:)
G.

Title: Re: Fixing removable brake hardware
Post by: dude... on March 17, 2015, 10:53:13 PM

force a woodscrew in there