Newbie Question : what kind of carbon fiber should i use for tube making (for bicycle project)

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Newbie Question : what kind of carbon fiber should i use for tube making (for bicycle project)

Newbie Question : what kind of carbon fiber should i use for tube making (for bicycle project)

Author	Message
taikuri	taikuri posted 9 Years Ago Topic Details
Group: Forum Members Posts: 13, Visits: 167	Hello Everyone. Been lurking this great forum for a while and now i have already some experience with CF and vacuum bagging technic. For my next project i need to build CF tubes, mostly round ones, but also different shapes of tubes. But lets start with round ones. I have round mandrill with the exact internal diameter what i want and my idea is to roll the CF around it, then apply thermoshrinking tape over it to make nice carbon tubes, never done it but i have understood this would be best way to do it. Since i have very little experience on different kind of carbon materials, and I dont have any good shop nearby where i can go and buy small test pieces, my only choice is to read and ask as much as i can and then order some material for my projects. Now my question is, what would be close to ideal CF fabric to make round tubes, surface finish dont (looks) matter to me, just want to build good strong tubes for bicycle. Any advice or links to a further information is highly appreciated. Thanks
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Chris Scott	Chris Scott posted 9 Years Ago Post Details
Group: Forum Members Posts: 20, Visits: 235	I've been using woven carbon fiber sleeves and had great results. I've tried using regular cloth, but it's very difficult and time consuming and you still end up with a seam from where the fabric is cut. I use compressed air to separate the part from the mandrel and it slides off with little to no effort.
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taikuri	taikuri posted 9 Years Ago Post Details
Group: Forum Members Posts: 13, Visits: 167	Hello. Thank you for the reply. So you have made strong tubes using only braided sleeves ? May i ask for what purpose you use those tubes ?
	Reply Like 1
Fasta	Fasta posted 9 Years Ago Post Details
Group: Forum Members Posts: 468, Visits: 3.5K	Metal mandrel and pre preg materials is best strength, easier and far less mess than wet layup but of course you need an oven to suit your job. Fastacraft Facebook page
	Reply Like 1
Chris Scott	Chris Scott posted 9 Years Ago Post Details
Group: Forum Members Posts: 20, Visits: 235	I've only made two layers thick so far, for a night stand. It's pretty strong and light as a feather. I'm going to be making some tubes 4 layers thick then filling with expanding foam for my race car (holding my fuel cell). I'll be doing a three point flexural test to see the strength of that. The awesome part is you can make the tube as strong as you need it by adding more layers (if dimensionally it is permitted).
	Reply Like 1

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