Stripped derailleur hangar threads

chuck said:

Somewhere I read about a nut/insert to fix this. Can anyone tell me
where to buy one of these? I looked for a 10x1.0mm helicoil and
couldn't find one. As a temporary fix, I put JB weld in the thing.
Tomorrow I'll run a tap through it, but I don't know how long this
will last.

Probably a very long time. Derailleur hangers don't undergo much stress at
all during proper, normal use.
--
Phil

chuck said:

Somewhere I read about a nut/insert to fix this. Can anyone tell me
where to buy one of these? I looked for a 10x1.0mm helicoil and couldn't
find one. As a temporary fix, I put JB weld in the thing. Tomorrow I'll
run a tap through it, but I don't know how long this will last.

Like this:
http://www.loosescrews.com/index.cgi?d=single&c=Misc&sc=Dropouts/Braze%20Ons&item_id=WB-DS2&id=916075329004

You may have to cut and past the URL, I don't believe in online
shortener/relays.

Marcus

On Wed, 29 Nov 2006 03:08:03 GMT, chuck <[email hidden]>

Quoted message said:

Somewhere I read about a nut/insert to fix this. Can anyone tell me
where to buy one of these? I looked for a 10x1.0mm helicoil and couldn't
find one.

McMaster-Carr has them, but the kit is $66.79 plus shipping. There's
another kit available through many auto parts distributors, but it's
intended for small-engine spark plugs; the kit sells for over $100
new. (I have one.) TimeSert makes a better solution IMO, but their
kit is just as pricey and even less widely available.

Quoted message said:

As a temporary fix, I put JB weld in the thing. Tomorrow I'll
run a tap through it, but I don't know how long this will last.

The tab is too thin for a helicoil in most cases, but this type of
insert is widely available:

http://www.wheelsmfg.com/products.php?cat=tools&prod=framerepair

In general, if you can't get seven full lands of thread, a helicoil is
going to be iffy at best.

There's a good chance that your homebrew fix will hold long enough to
get one of the shouldered sleeves.

By any chance, is the der hanger tab a replaceable part on that frame?
--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

chuck said:

Somewhere I read about a nut/insert to fix this. Can anyone tell me
where to buy one of these? I looked for a 10x1.0mm helicoil and couldn't
find one. As a temporary fix, I put JB weld in the thing. Tomorrow I'll
run a tap through it, but I don't know how long this will last.

Last week I noticed that the derailleur was very loose on a used bike I
bought last month. I reached down and pulled it straight out with my
fingers. Interesting that it had not given me any trouble on the road;
even shifted fine. The threads were gone on the lower half of the
bolt, and gone from the upper half of the derailleur hangar. I chased
the threads with the tap, threw another derailleur in there, tightened
the bolt just a hair past finger-tight, and it's been doing fine for 50
miles so far. I thought about loctite, but will see how it does
without it first.

My housemate suggested what you are doing, so I will look forward to
hearing how it comes out.

Doug

Marcus Coles said:

chuck said:

Somewhere I read about a nut/insert to fix this. Can anyone tell me
where to buy one of these? I looked for a 10x1.0mm helicoil and couldn't
find one. As a temporary fix, I put JB weld in the thing. Tomorrow I'll
run a tap through it, but I don't know how long this will last.

Like this:
http://www.loosescrews.com/index.cgi?d=single&c=Misc&sc=Dropouts/Braze%20Ons&item_id=WB-DS2&id=916075329004

You may have to cut and past the URL, I don't believe in online
shortener/relays.

Marcus

The nice thing about the Loose Screws site (and Bike Tools Etc., which
apparently uses the same software) is that it's very easy to trim the
URL by hand into something manageable, like this:
http://www.loosescrews.com/index.cgi?d=single&item_id=WB-DS2

Jeff

Werehatrack said:

On Wed, 29 Nov 2006 03:08:03 GMT, chuck <[email hidden]>

Quoted message said:

Somewhere I read about a nut/insert to fix this. Can anyone tell me
where to buy one of these? I looked for a 10x1.0mm helicoil and couldn't
find one.

McMaster-Carr has them, but the kit is $66.79 plus shipping. There's
another kit available through many auto parts distributors, but it's
intended for small-engine spark plugs; the kit sells for over $100
new. (I have one.) TimeSert makes a better solution IMO, but their
kit is just as pricey and even less widely available.

Quoted message said:

As a temporary fix, I put JB weld in the thing. Tomorrow I'll
run a tap through it, but I don't know how long this will last.

The tab is too thin for a helicoil in most cases, but this type of
insert is widely available:

http://www.wheelsmfg.com/products.php?cat=tools&prod=framerepair

I got one of these (just the insert) on ebay for a very reasonable price. It
was the only place I could find that would deliver internationally.

When it was in place, I soldered it into the frame to make removing the
derailer less fuss in future, but that bit is purely optional.

Quoted message said:

chuck said:

Somewhere I read about a nut/insert to fix this. Can anyone tell me
where to buy one of these? I looked for a 10x1.0mm helicoil and couldn't
find one. As a temporary fix, I put JB weld in the thing. Tomorrow I'll
run a tap through it, but I don't know how long this will last.

Last week I noticed that the derailleur was very loose on a used bike I
bought last month. I reached down and pulled it straight out with my
fingers. Interesting that it had not given me any trouble on the road;
even shifted fine. The threads were gone on the lower half of the
bolt, and gone from the upper half of the derailleur hangar. I chased
the threads with the tap, threw another derailleur in there, tightened
the bolt just a hair past finger-tight, and it's been doing fine for 50
miles so far. I thought about loctite, but will see how it does
without it first.

I did exactly what you're talking about 6000 miles ago, so expect your
fix to work for awhile.

Quoted message said:

My housemate suggested what you are doing, so I will look forward to
hearing how it comes out.

Doug

On Wed, 29 Nov 2006 03:08:03 GMT, chuck <[email hidden]>

Quoted message said:

Somewhere I read about a nut/insert to fix this. Can anyone tell me
where to buy one of these? I looked for a 10x1.0mm helicoil and couldn't
find one. As a temporary fix, I put JB weld in the thing. Tomorrow I'll
run a tap through it, but I don't know how long this will last.

If it's a steel droput you can fill the sides of the hole with brass
and re-cut the threads; a hand-held propane torch can do this as the
bit's not very big.

"Marcus Coles" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

chuck said:

Somewhere I read about a nut/insert to fix this. Can anyone tell me
where to buy one of these? I looked for a 10x1.0mm helicoil and couldn't
find one. As a temporary fix, I put JB weld in the thing. Tomorrow I'll
run a tap through it, but I don't know how long this will last.

Like this:
http://www.loosescrews.com/index.cgi?d=single&c=Misc&sc=Dropouts/Braze%20Ons&item_id=WB-DS2&id=916075329004

You may have to cut and past the URL, I don't believe in online
shortener/relays.

They must read r.b.r. It's the featured item on their home page right now.

JF

Re: Stripped derailleur hangar threads

Well, as long as the plane fits inside, it should be fine... 😉

--
Phil

Non-Squid said:

Re: Stripped derailleur hangar threads

Well, as long as the plane fits inside, it should be fine... 😉

But is it a block plane or a molding plane?
--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

"Werehatrack" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Non-Squid said:

Re: Stripped derailleur hangar threads

Well, as long as the plane fits inside, it should be fine... 😉

But is it a block plane or a molding plane?
--

Is that molding plane a hollow or a round?