Making a Colnago steel frame

[fastpedaller]

Here's a nice clip which shows the process of pinning/brazing a steel frame:-
http://www.youtube.com/watch?v=LdOWRbk5x-Q

But at various points it looks like drilling it taking place, and pins being fitted to joints that have already been heated - I wonder if some of this is just for the camera? maybe I'm mistaken.........
FP

[NetworkMan]

If you don't braze all of the lug at once, you could perhaps pin the joints that are done so that the brazed ones don't move when you heat the others - just a guess. Interesting video, thanks for posting. Shame the commentary wasn't more informed - he probably meant jig when he said rig. Also surely it was being brazed, not welded, wasn't it?

[Gattonero]

Here's a nice clip which shows the process of pinning/brazing a steel frame:-
http://www.youtube.com/watch?v=LdOWRbk5x-Q

But at various points it looks like drilling it taking place, and pins being fitted to joints that have already been heated - I wonder if some of this is just for the camera? maybe I'm mistaken.........
FP

I don't think the video is in the right sequence.
The pins (or nails, as some would use) are fitted before the brazing takes place with the purpose of keeping the frame aligned.

Some builders will tack the frame in a similar manner, others will use a small spot of tig welding, others will use one spot of brass.
Also is interesting to note this builder does braze only certain areas -presumably to re-jig if needs to- and applies the braze-ons after all the brazing has been done; while other builder will fit all the braze-ons before the tubes are joined together, to prevent further distortion.


There's no real better or worse way, each builder has his own style in building due to the experience of many years.

Those are from R. Sachs




note how this builder does not miter the tubing by machines, leaving a rough cut end that is eventually filed by hand

[tim-b]

Hi
There doesn't seem to be a pattern to the brazing and pinning; the BB shell at 0:42 is pinned, no heat, the seat lug has been tacked and then pinned (1:03)
I guess that the builder has a reason for his choices
Regards
tim-b

[Gattonero]

There is also a good chance that he's working in batches, so the BB is from one frame and the seat cluster is from another?

[Mick F]

Well, I've learned something there perhaps.

Colnago has always been pronounced as Kol-nay-go in my experience.
The chap narrating on the movie pronounced it as Kol-nar-go.

[Gattonero]

There's no "y", it's Colnago

[kylecycler]

FWIW, Tange, the tubing manufacturer, is pronounced "Tan'geh", with a hard 'g', not "Tanj" which is what I used to think.

[Mick F]

There's no "y", it's Colnago

Have you ever eaten sago pudding?

[Gattonero]

There's no "y", it's Colnago

Have you ever eaten sago pudding?

I don't even know what "sago pudding" is.
(hence I avoid commenting about)

[Mick F]

Sago.
Pronounced Say-go. Not Sar-go.

https://en.wikipedia.org/wiki/Sago_pudding

[Gattonero]

There's abundance of cakes/sweet stuff in Italy that I never had the need to try this pudding thing, hence I don't even need to know how it's pronounced

[sukuinage]

How do you start a pudding race...




...Sago

[Mick F]

[peetee]

Ee-thur,
Eye-thur,
Aw, let's call the whole thing off!