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Post by parabolous on Oct 4, 2015 6:17:19 GMT
Hi all!
Been doing some searching on replacing the half hoods for my Aerospace pro and Lambert "trophy."
Velo Orange recently began selling mafac style half hoods and thought that would be a good option, though they don't have white available, but realized the half hood are different. The hoods on my Viscount and Lambert are more bulbous at the non-aero part whereas the mafac are more sleek.
So I thought about molding and casting the hoods from my Aerospace since they are in decent structural condition.
Has anyone ever tried this or heard of it being done?
I'm having a hard time finding information about the type of rubber used in these hoods and what type of material I would use to make a mold and cast the hoods out of.
Because of the more 3D aspect of the hoods, specifically the non-aero opening, I assume I'll need to make a 2-part mold. I'd likely seal the hoods with silicone to help create a smooth surface.
This could be a fun project and hopefully beneficial for all those looking to get that restored look for their steeds!
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Post by cusqueno on Oct 4, 2015 18:05:40 GMT
I've thought of using Sugru. But it's not got beyond thinking about it yet.
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Post by parabolous on Oct 4, 2015 21:45:08 GMT
I also thought of Sugru, since it would mostly be just shaping it but it costs a good amount for such a small bit of it.
I'm looking at a company called Smooth-On for molding and casting but they mostly deal with plastics and resins rather than rubber, gum rubber. In fact, there seems to be a gap between soft silicone and hard plastic resins.
I'll contact them to get more information, and hopefully they may know exactly what I'll need.
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Jem
Viscount
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Posts: 3,389 
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Post by Jem on Oct 4, 2015 21:50:23 GMT
I'm interested to hear how things go.
I'm another big fan of Sugru. Just picked up a few packs this weekend at 40% off when spending over £15.
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Post by velocipete on Oct 5, 2015 5:58:01 GMT
I saw an article on the Instructibles site which detailed how to make your owc "sugru".
From what I recall it was much cheaper.
Cheers,
Pete.
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Post by bicyclebits on Oct 7, 2015 12:59:01 GMT
There is an online shop in Spain called Reciclone (http://www.reciclone.com/shop/category.php?id_category=19) whose owner makes replica brake hoods. He recreates the molds and casts the hoods in rubber. I purchased a set of Jordi's full hood Mafac lever covers and they were very nice quality. Perhaps a member here might contact him regarding reproduction hoods for Lambert/Viscount levers. Typically, the hoods are available in black or gum colour.
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Post by cusqueno on Oct 7, 2015 14:12:04 GMT
I saw an article on the Instructibles site which detailed how to make your owc "sugru". From what I recall it was much cheaper. Cheers, Pete. This is the Instructables link. The products of the Spanish shop posted by bicyclebits look very nice, although they don't seem to produce a white hood - might be worth asking. Also, €35 + shipping buys a fair amount of Sugru, even at full price. |
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Post by parabolous on Oct 8, 2015 3:15:23 GMT
There is an online shop in Spain called Reciclone (http://www.reciclone.com/shop/category.php?id_category=19) whose owner makes replica brake hoods. He recreates the molds and casts the hoods in rubber. I purchased a set of Jordi's full hood Mafac lever covers and they were very nice quality. Perhaps a member here might contact him regarding reproduction hoods for Lambert/Viscount levers. Typically, the hoods are available in black or gum colour. I tried to contact the owner but no response so far. I think the biggest issue with molding would be finding hoods still intact. Mine are okay enough to silicone together but I don't know about shipping overseas and ever seeing them again! |
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Post by bicyclebits on Oct 12, 2015 22:55:09 GMT
parabolous-
The base line quality of a template hood is an issue. I have forwarded Jordi a NOS Mafac adjuster so he can prototype them so he is interested in additional offerings. I will email him as well.
Jim
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Post by parabolous on Oct 12, 2015 23:09:24 GMT
parabolous- The base line quality of a template hood is an issue. I have forwarded Jordi a NOS Mafac adjuster so he can prototype them so he is interested in additional offerings. I will email him as well. Jim Awesome to hear you have sent the Mafac! My hoods are good enough to have the miniscule cracks filled and then have the hoods sealed and used, but I would have to get it done perfectly, the first time to prevent the hoods going through multiple moldings. I was thinking of filling and sealing the hoods with silicone, as many people has used that to sort of stop the degradation process on vintage hoods. Though, most of the molding materials I have looked at use silicone for the mold and silicone sticks to itself so I'm still researching what I can use. If Jordi can produce the hoods, that would be a feat and it would surely be appreciated! |
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Post by bicyclebits on Oct 13, 2015 0:16:08 GMT
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Post by parabolous on Oct 13, 2015 1:15:51 GMT
Do original Mafac half hoods for the Viscount original levers? The Viscount hoods seem to have a different shape on them.
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Post by Reciclone on Oct 13, 2015 8:40:19 GMT
Hi guys! Jordi here... Reproducing the hoods is not an easy matter. Many things can, and in fact, go wrong... The rubber is very sensitive to climate conditions... in some cases may not cure at all (Depending of the moisture in the air) In others it does cure but brakes after a couple of weeks. In general I think is a good prduct and the price is fair even considering that it is not perfect. When an accident occurs I send new hoods free of cost. Regarding the half hoods. I did manage to cast them but the Mafac logo is not visible. The are actually perfectly functional. I have made them for my Zeus: recicloneworld.blogspot.com.es/search?updated-max=2014-07-12T21:23:00%2B02:00&max-results=3&start=9&by-date=falseThe tricky thing here is the metal plaque that goes inside and is got to be drilled in the exact right place... To make a couple I often make two or three... It is manufacturated stuff we're talking about and consequently not error free... I have to remake the molds for the half hoods... I will, soon. I'll let you know when I have them... I'll be able to make them in every colour. Even white. Thanks for the interest... Salut i pedals! (Health and pedals) Jordi |
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Post by bicyclebits on Oct 13, 2015 11:44:47 GMT
Jordi-
Do you already have a Viscount style half hood to use to make a mold or are you thinking that the Mafac half hoods might fit? I have no personal experience with the Viscount style half hoods but I am not sure that would work considering the shape of the Viscount lever body. Perhaps another person here could provide you with an original style Viscount hood to make the prototype if you do not have one?
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Post by Reciclone on Oct 13, 2015 12:17:01 GMT
To be honest I've never seen a Viscount hood... I normally haunt hoods on Ebay ;o) Whenever I see one in perfect condition I buy it, so that I can reproduce it. I Have Olimpic Half hoods and Alfa Half hoods, both spanish brands... Maybe they would fit... I've been looking arround for the viscount ones... I coudn't find any...
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Post by cusqueno on Oct 13, 2015 20:50:30 GMT
A couple of photos of a Viscount hood I found on my phone. The frog just hopped into the frame. Ignore him. Attachments:
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Post by reciclone on Oct 14, 2015 7:14:15 GMT
They look quite different of all half hoods I've ever seen... Don't they have a metal plaque to get attached to the brake itself?
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Post by cusqueno on Oct 14, 2015 10:24:48 GMT
They look quite different of all half hoods I've ever seen... Don't they have a metal plaque to get attached to the brake itself? No, there's nothing. They have to be held on by the bar tape. |
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Post by reciclone on Oct 14, 2015 11:44:05 GMT
Easyer to make then.... The question will be to get a decent one... Or to manufature it and after that to cast it...
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Post by cusqueno on Oct 14, 2015 12:18:08 GMT
Easyer to make then.... The question will be to get a decent one... Or to manufature it and after that to cast it... I have a better one than the one in the photo. I would be prepared to lend that for copying. Just need to find it ... |
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Post by reciclone on Oct 14, 2015 12:45:47 GMT
If you can just post a picture to see if it is apropiated for casting...
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Post by cusqueno on Oct 16, 2015 12:15:47 GMT
If you can just post a picture to see if it is apropiated for casting... Here are some pictures. The hoods are not new and have been fitted, but they are in quite good condition. |
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Post by cusqueno on Oct 16, 2015 12:19:38 GMT
If you can just post a picture to see if it is apropiated for casting... and some more, showing the hoods on the levers (Lambert/Viscount levers). Attachments:
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Post by dracco on Oct 16, 2015 12:50:20 GMT
Without any knowledge of the technology, I wonder if these could be made by 3-D printing?
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Post by reciclone on Oct 18, 2015 8:31:23 GMT
Yes they could.... The only problem is the material... You could make them out of plastic.
It will come. for sure, but not yet.
I'll try to make them out of a special clay and cast them... I just don't know how long is gonna take me.
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Post by reciclone on Oct 18, 2015 8:34:30 GMT
By the way thanks for the info... cusqueno!
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Jem
Viscount
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Posts: 3,389
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Post by Jem on Oct 18, 2015 10:00:14 GMT
Without any knowledge of the technology, I wonder if these could be made by 3-D printing? Interesting thought and 3D printing will no doubt offer up a world of possibilities in time. Imagine sharing 3D printing files of hard to find components...that would be something. |
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Post by cusqueno on Oct 18, 2015 20:21:58 GMT
Proof of concept test with some (black) Sugru. I fixed some foam rubber round a Lambert lever with Sellotape (Scotch tape) to define the edges of the hood and wrapped with cling film (Saran wrap?). Used an alloy nipple and stuck a stick in to make the cable hole. Then covered with Sugru. I used four 5g mini packs. So 20g altogether. That's a random bit of plumbing that's standing in for handle bars. Attachments:
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Post by cusqueno on Oct 18, 2015 20:31:58 GMT
Here's the result after a bit of tidying up with a knife. The Sugru version weighs 15g whereas the original is 13g. Shows I think that the copy is close. Next thing might be to make a female mood corresponding to the outside of the hood to give a better appearance. The internal fit is good, as would be expected from the way I made it. |
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Post by velocipete on Oct 18, 2015 20:45:27 GMT
That's very interesting John.Reproducable quite cheaply then?
For Bendo,Sellotape is called Durex in your neck of the woods!
Cheers,
Pete.
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