Cable Guide Hole Too Small?

In article
<[email hidden]>,
[email hidden] says...

Quoted message said:

Hello Esteemed Bike Wrenchers, I am building up a Colnago
Master X Light. Things were moving along fine until I tried
to secure the derailleur cable guide to the bottom bracket
shell. The screw wont fit, as a matter of fact, I can't see
any threads in the hole. What are the chances the opening
is not threaded?

Colnago's aren't known for their high quality and attention
to detail. They do have nice paint jobs.

Quoted message said:

The calipers say the screw is about 5mm, the hole is about
3mm . Is there a smaller screw for Italian Frames? Any
suggestions on how to make this work would be appreciated.
I can't believe that Ernesto would let a frame go out the
door unfinished.

Use a tap to tap the existing hole. If this was me, I would
take it back to the shop where I paid the big bucks and have
them fix the problem.
--------------
Alex

Quoted message said:

am building up a Colnago Master X Light. Things were
moving along fine until I tried to secure the
derailleur cable guide to the bottom bracket shell. The
screw wont fit, as a matter of fact, I can't see any
threads in the hole.

It may be a drain hole. Are there any other ways to run the
cable? Phil Brown

Perhaps little eyelets brazed to the shell?

"Phil Brown" <[email hidden]> wrote in message news:20040703214803.23133.00000967@mb-
m07.aol.com...

Quoted message said:

Quoted message said:

am building up a Colnago Master X Light. Things were
moving along fine until I tried to secure the
derailleur cable guide to the bottom bracket shell. The
screw wont fit, as a matter of fact, I can't see any
threads in the hole.

It may be a drain hole. Are there any other ways to run
the cable? Phil Brown

John said:

Hello Esteemed Bike Wrenchers,

I am building up a Colnago Master X Light. Things were
moving along fine until I tried to secure the derailleur
cable guide to the bottom bracket shell. The screw wont
fit, as a matter of fact, I can't see any threads in the
hole. What are the chances the opening is not threaded?

The calipers say the screw is about 5mm, the hole is about
3mm . Is there a smaller screw for Italian Frames? Any
suggestions on how to make this work would be appreciated.
I can't believe that Ernesto would let a frame go out the
door unfinished.

You can't believe that? You don't see many Colnagos.

Bianchi used to ship with a sheet metal screw in a 3mm hole
there. Or you could just tap it m5 x 0.8 before you build
the bike. This is not a crisis, just a detail.

--
Andrew Muzi www.yellowjersey.org Open every day since 1
April, 1971

(John) said:

Hello Esteemed Bike Wrenchers,

I am building up a Colnago Master X Light. Things were
moving along fine until I tried to secure the derailleur
cable guide to the bottom bracket shell. The screw wont
fit, as a matter of fact, I can't see any threads in the
hole. What are the chances the opening is not threaded?

The calipers say the screw is about 5mm, the hole is about
3mm . Is there a smaller screw for Italian Frames? Any
suggestions on how to make this work would be appreciated.
I can't believe that Ernesto would let a frame go out the
door unfinished.

Thanks,

John

A sheet metal screw? Or drill and tap. Doesn't have to be
metric. A 3mm hole is right around a #8 or #6 screw or bolt.

I had a similar problem, and just put a couple of small tabs
of double sided tape on the guide. The cables pretty well
hold the guide in place, and the tape gave enough hold for
proper positioning. This probably won't be good for the
paint under the double stick, but I figure a cable guide
will cover whatever happens.

jnerges-<< I am building up a Colnago Master X Light. Things
were moving along fine until I tried to secure the
derailleur cable guide to the bottom bracket shell. The
screw wont fit, as a matter of fact, I can't see any threads
in the hole. >><BR><BR>

Colnago uses a screw that looks all the world like a short
wood screw, w/o any threads in the BB shell hole. It'll work
if ya gun it in there but taping the hole is a better idea.

Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St.
Boulder, CO, 80302
(303)440-3535 vecchios.comvecchios.comOpen ↗ "Ruote convenzionali
costruite eccezionalmente bene"

John said:

I am building up a Colnago Master X Light. Things were
moving along fine until I tried to secure the derailleur
cable guide to the bottom bracket shell. The screw wont
fit, as a matter of fact, I can't see any threads in the
hole. What are the chances the opening is not threaded?

If you don't see any threads, it's probably not threaded.

Quoted message said:

The calipers say the screw is about 5mm, the hole is about
3mm . Is there a smaller screw for Italian Frames?

There's a wide variety of cable guides out there, and not
all of them use screws to fasten in place. Some simply pop
in and use a plastic flange on the guide to hold it.

Leaving the hole unthreaded gives the customer the widest
choice in how to attach their preferred cable guide. It's
only a matter of a couple minutes to run a tap through the
hole to cut some threads.

Quoted message said:

Any suggestions on how to make this work would be
appreciated.

Use a thread gauge to determine the size of the hardware you
intend to use, select a tap of the proper size and cut some
threads in the hole.
:-)

Quoted message said:

I can't believe that Ernesto would let a frame go out the
door unfinished.

Traditionally, most European frames were shipped unprepped;
the bike shop was to do the final prep and assembly.
Ernesto may simply be continuing to supply frames in the
traditional manner...

--

-John ([email hidden])

Tapping the hole worked like a charm. The Master X is up and
running, what a great ride. And you are right, it is a
gorgeous paint job.

Thanks for you help on this,

John

John Thompson <[email hidden]> wrote in message
news:<[email hidden]>...

Quoted message said:

John said:

I am building up a Colnago Master X Light. Things were
moving along fine until I tried to secure the derailleur
cable guide to the bottom bracket shell. The screw wont
fit, as a matter of fact, I can't see any threads in the
hole. What are the chances the opening is not threaded?

If you don't see any threads, it's probably not threaded.

Quoted message said:

The calipers say the screw is about 5mm, the hole is
about 3mm . Is there a smaller screw for Italian Frames?

There's a wide variety of cable guides out there, and not
all of them use screws to fasten in place. Some simply pop
in and use a plastic flange on the guide to hold it.

Leaving the hole unthreaded gives the customer the widest
choice in how to attach their preferred cable guide. It's
only a matter of a couple minutes to run a tap through the
hole to cut some threads.

Quoted message said:

Any suggestions on how to make this work would be
appreciated.

Use a thread gauge to determine the size of the hardware
you intend to use, select a tap of the proper size and cut
some threads in the hole.
:-)

Quoted message said:

I can't believe that Ernesto would let a frame go out
the door unfinished.

Traditionally, most European frames were shipped
unprepped; the bike shop was to do the final prep and
assembly. Ernesto may simply be continuing to supply
frames in the traditional manner...