Rear derailleur hanger thread repair...advice

JeRkY · Apr 26, 2010

Has any one tried either a hellicoil type insert or a frame saver repair for a stripped derailleur hanger.

I have just noticed the hanger on the Dogsbolx is looking rather stripped thread wise. My first thought was to tap it from the wheel size using an M10x1.0 mm tap...sadly I dont have one to hand ..plenty of coarse threads but no 1.0mm!

But if that doesnt sort it out then I will be looking to use either a hellicoil or a frame saver, so which would you use and why?

Money is tight at the mo, but I would like to do the best job I can afford!

cchris2lou · Apr 26, 2010

there was a mech mounted on it when i got it and it came off easily . no metal on mech threads .

I have used the frame saver bolt from BETD in the past and it does the job . not cheap ( just under £10 I think ) , but it does save your frame .

stevet1 · Apr 26, 2010

Derailleur hangars are the same pitch and thread size as wheel axles I think - so if you have an old wheel axle you might be able to chase the threads a bit with that.

tintin40 · Apr 26, 2010

cchris2lou":18awza04 said:
there was a mech mounted on it when i got it and it came off easily . no metal on mech threads .

I have used the frame saver bolt from BETD in the past and it does the job . not cheap ( just under £10 I think ) , but it does save your frame .

I have one i'm not using any more. Fitted to the rear mech hanger of my first Trimble. This had been heli-coiled in the past.
Can drop it at your work one day this week?

JeRkY · Apr 26, 2010

That would be superb Tintin! Much appreciated!

tintin40 · Apr 26, 2010

here are a few pic's. Try it and if works then buy me a coffee at the next meet

Dead Rats · Apr 27, 2010

I used one of those, trick is to file frame JUST enough to push it in (should be very snug fit) IIRC

Rear derailleur hanger thread repair...advice

JeRkY

cchris2lou

stevet1

tintin40

JeRkY

tintin40

Dead Rats

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