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Monthly Archives: May 2012

Nuevo Clubman continued

The build continued with a mixture of Reynolds 708 OS and Columbus tubes. Along with the dropouts that I machined and the stainless lugs that had been polished went a Walter BB. Apart from the need for extra cleanliness when joining stainless the construction is pretty much the same as a normal frame and given that the only stainless in the fork is in the dropouts then everything went as per normal.These dropouts go both inside and outside the tubes by virtue of two slots cut into them the same dimension as the tubing diameter. The bit on the outside of the tube after brazing gets filed down and in this case polished

Handcut front dropout after paint

Handcut front dropout after paint

Using any component of framebuilding for the first time is always interesting. You wonder if for some reason, this tube or that crown or a lug with that much cut out of it will be more difficult or pose some challenge that you havent envisaged or seen before. Some builders never face this as they use the same stuff all the time. For me that would take much of the enjoyment out of the process. This frame had a number of firsts. I had never used a Pacenti crown or a set of stainless frame lugs. I wasnt exactly sure how my hand cut dropouts would go and I was very aware of the fact that the cantilever brakes that the frame was designed for would place more stress on the seatstay/seat lug junction than a set of caliper brakes. This is because cantilevers exert outward pressure on the stays rather than being centred around the pivot bolt of a caliper. For this reason I added a couple of extra gussets around the top of the chainstays so that their edges actually overlapped the outside of the stays

Lug extension gussets

. This means that along with the extra material that I could build a fillet on I also have this surface for the braking force to act on if it needs to. The pictures may not show you everything but I hope you get the idea. Despite my concerns I didn’t run up against anything to difficult and was pretty happy with the final product. Once it was complete I masked the stainless for both blasting and painting and looked forward to building it up.

Columbus S bend stays

Columbus S bend stays

If you feel like this description is missing some pictures,scan the folio pages for pictures of the crown and the rear dropouts during the process

Front on after paint

Front on after paint

Rear dropouts after paint

Rear dropouts after paint

Full frame after paint

Full frame after paint

 
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Posted by on May 30, 2012 in Uncategorized