G'day all, Tried to start this post last evening but image posting was stubborn, seems to be working this morning so here goes.
First I hope everyone had a great Holiday Season with your families. We were especially blessed by our middle son finally being able to share Thanksgiving and Christmas with his family for the first time in 7 years and for that, I am most thankful.
Any how, Thanks Scott for your reply to my Thanksgiving post and images demonstrating cleaning out some of the errant brazing material to allow bottom bracket cups to seat. I'm not sure how the total component package will develop but hoping to utilize the Campy devices that would be expected on a Super Corsa.
With that said let me share my first attempt to utilize a Velo Orange French Thread sealed bearing bottom bracket assy with the Campy Nuovo Record Triple crankset ( 36, 42, 53 ). This was their French Thread 68 mm shell width, 118 mm axle length.
https://postimg.cc/image/vcr6k2asz/
Small chain ring to 4th sprocket: chainline issue and greater concern is the incomplete seating of the ISO dimension of the crank arms to the JIS dimension of the Velo Orange assy
https://postimg.cc/image/6jhmjg9sz/
Left side view of the adjustable cup seating. The assembly instruction are not clear as far as torque value---(I had only gently seated the adjustable cup and it was starting to make contact internally against the sealed bearing unit. The R side "fixed" portion of the sealed unit had been gently inserted but seated against the shell--it would seem the adjustable cup would land up slightly inside the shell when fully tightened)--- for the fixed and/or adjustable cups. The Velo Orange unit is well made and feels like a great option if you have crank arms compatible with JIS dimension. To me these arms even when eventually seated did not "Grab" enough of the spindle given the load they may eventually see.
Also ---yes I need to correctly position the middle chain wheel when I clean and reassemble the crankset---it is reversed at this time-- obtained in that configuration when purchase this past year off of E bay.
https://postimg.cc/image/iy4ejs90z/
https://postimg.cc/image/54g1ur3kz/
Crank arm spacing in relation to Rear stays, Left and Right sides
https://postimg.cc/image/425vc8ncj/
The JIS VS ISO taper fit---left side obvious and the R side was a little deeper but image doesn't really clearly demonstrate the shallow seating. This is a Suntour triple front derailleur---my future post will demonstrate the hopeful use of a Campy Euclid MTB triple for final component choice. There is a really nice chrome finish on the Velo Orange spindle design.
https://postimg.cc/image/omapaqq8z/
Really the R Crank-Chainring needs to be further to the left---this chainline small front chairing to 5th sprocket, I had about 5mm clearance between Right Rear stay and the small chainring (the R crank arm was not fully tightened at these images only lightly seated w/o final torque) so I don't know how far the Crank arm would seat on the JIS spindle when finally completely tightened and how much of that clearance would be lost.
https://postimg.cc/image/uzzse0akj/
Small chainring to 3rd sprocket and chainline looks pretty good---BUT if I understand the principle for triple chainrings the ideal would be from the middle chainring to the 3rd sprocket.
Velo Orange supplies different spacers so you can move the unit outward on the drive side if needed in some offset situations. Their bottom bracket assembly looks well engineered. I like the sealed bearing unit and likely water resistance. As I noted above, these would be a good option if one was trying to come up with a replacement to the original loose bearing type bottom bracket. They even have a "Threadless" option if bottom bracket shell threads were not salvageable or useable---their staff member recommended the threaded version if at all possible.
In my case I think the 113 mm length would improve the chainline (as noted the 5mm clearance with the 118 mm design) as R side would be further left with the narrower spindle. BUT I really don't know ---My concern again was really the shallow seating on the spindle with the ISO crankarm internal dimension.
My young LBS owner shared "Hey you can always 'hammer' the indented R stay area behind the bottom bracket shell to 'create' some additional small chainring clearnce
I have been watching for a Campy Triple 68mm spindle for a long time ---I missed a complete Crankset-Bottom Bracket assembly earlier this year. BUT right before Christmas some good Karma (albeit late night E bay adventure) came my way.
I'll share that result with the next post
I Like Steel !!!!
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C.A.
Salina KS
so I have no idea what kind of headset it had been using but obvious not the Campy that one would expect on a SuperCorsa.
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