Shimano FD, cable clamp socket threads damaged... Any advice

Arequipa

Hi,

I hope you are all well.

I was adjusting a Shimano 105 front derailleur...

Long story short the thread on the derailleur, that a bolt screws into, to clamp the cable, is rounded or damaged.

So the bolt won't screw in and hold the cable...

Do any of you know a fix for this or is it new derailleur time?

Thank you.

cletus

That's a small thread, easily damaged. You could try to drill it out, retap a bigger hole, and replace the bolt (machine screw, really) with a bigger one too, but there's all sorts of issues there.

I'm not sure that you'd get a thread insert that small for it.

Might be new derailleur time, unless anyone here has a fix I haven't thought of

magicbastarder

just to confirm; it's the thread in the derailleur that stripped, rather than on the bolt? if so, i suspect it's beyond economic repair.

Arequipa

Evening...yes it is on the derailleur itself...

Arequipa

Thanks mate... Yea.. I did a few cable changes and remember following a YouTube video on front derailleur set up and practicing on it... Maybe I tightened the bolt a bit too much.. but the thread doesn't seem to be very robust.

hesker

I would retap the hole first with the same size as the current bolt. You might get lucky.

After that it’s the method recommended by Cletus and you may be as well off buying a new der as going to that trouble.

cletus

https://www.boards.ie/discussion/comment/120680587#Comment_120680587

It's worth a try, I suppose, but there's probably only 3 full threads on a hole that size. I wouldn't trust it afterwards

hesker

The only other thing I can think of is a longer bolt and nut, if you have the clearance at the far side. You’d probably need a third hand if that’s going to work.

cletus

https://www.boards.ie/discussion/comment/120680688#Comment_120680688

New bike???

iwillhtfu

If there's still some threads left I'd try some ptfe tape on the screw and see if it holds. I wouldn't be getting to carried away buying bit s though the front mechs are usually pretty cheap. €10-€30

Just be sure it will work with your current groupset before buying second hand

https://www.adverts.ie/bike-group-sets/shimano-105-front-derailleur/30439336

Arequipa

Hi! Thank you for the replies... And the link to the ad... €10 for a FD... Can't go wrong there...

Is it just me or are Shimano middle to higher end components very easy to round the threads of... ie the metals seem very soft and fragile?

G1032

https://www.boards.ie/discussion/comment/120683220#Comment_120683220

I don't think it's just you. Damaged the bolt on an R7000 FD myself before.