Derailleur side plate thread repair

Bill said:

I stripped out the lower threads on the inside side plate of my Ultegra
RD-6500. Any suggestions on a suitable repair. Helicoil? Are machined
low profile tee nuts that could be epoxied in available?
Bill

How about a new side plate? Self clinching nut if it is the lower pulley
(more distance available to the spokes)?

<http://www.directindustry.com/prod/shanghai-jingyang/self-clinching-nut-39223-305497.html>

Lou

Bill said:

I stripped out the lower threads on the inside side plate of my Ultegra
RD-6500. Any suggestions on a suitable repair. Helicoil? Are machined
low profile tee nuts that could be epoxied in available?

For the cable anchor? A 5mm ReCoil, Helicoil or such may possibly be
used but since the steel sleeve you stripped is relatively thin, I
wouldn't approach it that way. A much simpler path is to use an allen
head bolt protruding from the inside. Use a nut with the original clamp
plate on the outside. If clearance is tight, use a allen bolt angled
under the head (din 7991) and shape the inside with a larger drill bit.
The allen head lets you hold the screw if it spins.

Looks like this:
http://www.weku-hbw.de/weku/images/dresselhaus/DIN7991.jpg
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

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

Quoted message said:

Bill said:

I stripped out the lower threads on the inside side plate of my Ultegra
RD-6500. Any suggestions on a suitable repair. Helicoil? Are machined low
profile tee nuts that could be epoxied in available?

For the cable anchor? A 5mm ReCoil, Helicoil or such may possibly be used
but since the steel sleeve you stripped is relatively thin, I wouldn't
approach it that way. A much simpler path is to use an allen head bolt
protruding from the inside. Use a nut with the original clamp plate on
the outside. If clearance is tight, use a allen bolt angled under the head
(din 7991) and shape the inside with a larger drill bit. The allen head
lets you hold the screw if it spins.

Looks like this:
http://www.weku-hbw.de/weku/images/dresselhaus/DIN7991.jpg
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

It's not the cable anchor. I stripped the threads in the side plate that
secure the bolt that holds the lower pulley. Need to insert something in the
inner plate (the removable one) to thread the bolt that secures the lower
pulley.

Bill said:

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

Quoted message said:

Bill said:

I stripped out the lower threads on the inside side plate of my
Ultegra RD-6500. Any suggestions on a suitable repair. Helicoil? Are
machined low profile tee nuts that could be epoxied in available?

For the cable anchor? A 5mm ReCoil, Helicoil or such may possibly be
used but since the steel sleeve you stripped is relatively thin, I
wouldn't approach it that way. A much simpler path is to use an allen
head bolt protruding from the inside. Use a nut with the original
clamp plate on the outside. If clearance is tight, use a allen bolt
angled under the head (din 7991) and shape the inside with a larger
drill bit. The allen head lets you hold the screw if it spins.

Looks like this:
http://www.weku-hbw.de/weku/images/dresselhaus/DIN7991.jpg
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

It's not the cable anchor. I stripped the threads in the side plate that
secure the bolt that holds the lower pulley. Need to insert something in
the inner plate (the removable one) to thread the bolt that secures the
lower pulley.

1) Figure out what the cheapest Shimano derailleur is that has a
compatible side plate, buy one of those used on eBay, and cannibalize it.
2) Ask at your LBS to see if they have one that is trashed for some
other reason that they can let you have the plate off of (or any
compatible unit, see above).
3) Find a pan head, internal hex bolt of the right size and a little
longer than the stock bolt (try the nuts & bolts section of your local
True Value hardware; forget about Home Depot). Drill out the stripped
hole to the outside diameter of the bolt. Put the bolt through from the
inside, and put a nut on the outside. For extra points, use a
nylon-insert nut, or use Loctite to hold it all together.
4) Spend some time in the aforementioned nuts & bolts section and see if
you can come up with something creative and less bulky. Have fun with it.

Mike Johnson

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

Quoted message said:

Quoted message said:

It's not the cable anchor. I stripped the threads in the side plate that
secure the bolt that holds the lower pulley. Need to insert something in
the inner plate (the removable one) to thread the bolt that secures the
lower pulley.

1) Figure out what the cheapest Shimano derailleur is that has a
compatible side plate, buy one of those used on eBay, and cannibalize it.
2) Ask at your LBS to see if they have one that is trashed for some other
reason that they can let you have the plate off of (or any compatible
unit, see above).
3) Find a pan head, internal hex bolt of the right size and a little
longer than the stock bolt (try the nuts & bolts section of your local
True Value hardware; forget about Home Depot). Drill out the stripped hole
to the outside diameter of the bolt. Put the bolt through from the inside,
and put a nut on the outside. For extra points, use a nylon-insert nut, or
use Loctite to hold it all together.
4) Spend some time in the aforementioned nuts & bolts section and see if
you can come up with something creative and less bulky. Have fun with it.

Mike Johnson

Mike, I'm going for a three pronged approach.
1) a message in rec, bicycles,tech looking for a trashed derailleur or
useable side plate.
2) message to the head mechanic at my capable LBS looking for a trashed
compatible derailleur and or plate
3) the combined wisdom of rec.bicycles.tech for a repair of the damaged
plate

One of the above ought to resurrect the Ultegra and in the meantime I've
called a good but old 600 RD back into service. This all goes on a winter
bike that gets far to little care. I think the bolt actually took the
threads with it when I unscrewed it. A little corrosion goes a long way.
Decided to clean and lube the pulleys while I was putting on a new chain. If
it ain't broke.................