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How to make reproduction Vittoria hoods

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How to make reproduction Vittoria hoods

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Old 09-14-16, 03:40 PM
  #51  
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Fratelli Pietra brake lever parts diagram. Kitching Handbook 1963.
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Old 02-24-17, 09:37 AM
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Bump, partly because this was a cool thread, but also because so many people expressed an interest in trying it. So, did anyone (other than @iab) try this? I have a pair of GB half hoods that need to be reproduced, but I have enough other projects to occupy me. Someone else should make this his/her cottage industry.
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Old 02-24-17, 03:28 PM
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Old 06-08-20, 02:53 PM
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I took some baby steps over the weekend

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Old 06-08-20, 03:52 PM
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Nice!
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Old 04-28-21, 07:58 PM
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FANTASTIC!!! Really appreciate the detail of your post. Here is another thread that goes into my archives for reference.

I am currently experimenting with "Flexable TPU" in my little Ender3 printer. So far things have been pretty rough but I think I may be able to get some fairly good looking parts soon.
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Old 04-28-21, 08:06 PM
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I'll repeat my offer on this thread as well: anyone who wants a vacuum pump to do casting, and can do me some Dura Ace BL-7401 lever hoods at some point, I can get you a "retired" scientific vacuum pump for free if you send me a shipping label. So much good stuff is thrown away around here these days.
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Old 03-20-24, 04:34 PM
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Originally Posted by rhm
Bump, partly because this was a cool thread, but also because so many people expressed an interest in trying it. So, did anyone (other than @iab) try this? I have a pair of GB half hoods that need to be reproduced, but I have enough other projects to occupy me. Someone else should make this his/her cottage industry.
I made it, and they are perfect when I post 10 posts here then I can share a photo..., availble for sell for 35 usd pair brown or black
I can also try to make your GB half hoods but need to ship them to me
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Old 03-20-24, 04:45 PM
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Originally Posted by bike-vintage.eu
I made it, and they are perfect when I post 10 posts here then I can share a photo...,
Upload some pictures to your gallery and ask for a pic assist. Someone will oblige.

I had some black Galli hoods which reacted badly with David's goop, never letting it cure. I now have an orphan gum rubber Galli hood (NOS). Any interest in making a run of them?
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Old 03-20-24, 06:41 PM
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Here are some pix from bike-vintage.eu :



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Old 03-20-24, 07:11 PM
  #61  
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Originally Posted by smontanaro
Upload some pictures to your gallery and ask for a pic assist. Someone will oblige.

I had some black Galli hoods which reacted badly with David's goop, never letting it cure. I now have an orphan gum rubber Galli hood (NOS). Any interest in making a run of them?
I learned more about that. Some rubbers have sulfur content and that inhibits the curing of platinum-cure silicone, the good stuff. There are tin-cured silicones that work with the sulfur-rubber, but then the low-durometer polyurethanes used for the hoods doesn't cure well in the mold. There is a method to cure the mold to work with the polyurethane, but it still comes out a bit funky. There is a coating you can put on the sulfur-rubber to make it work with the good platinum-cure silicone, but I have never gotten it to work. So in short, your Galli hoods are a pain in the ass.
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Old 03-20-24, 07:19 PM
  #62  
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Originally Posted by iab
I learned more about that. Some rubbers have sulfur content and that inhibits the curing of platinum-cure silicone, the good stuff.... So in short, your Galli hoods are a pain in the ass.
Do you think the black hoods (which caused the problems) might be different enough from the gum hoods that it would be worth trying with them? Would it be easy to test without going through the full mold creation process?
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Old 03-20-24, 07:33 PM
  #63  
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Originally Posted by smontanaro
Do you think the black hoods (which caused the problems) might be different enough from the gum hoods that it would be worth trying with them? Would it be easy to test without going through the full mold creation process?
I haven't a clue. There is a test that can be done. Bring a hood at the end of April.
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