Carbon Tube into Aluminium Housing

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Carbon Tube into Aluminium Housing

Author	Message
ArronApex	ArronApex posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 7, Visits: 29	wozza (01/03/2013) Hi Arron. Not sure what your project is? but I use Carbon Tube and Aluminium inserts for Race Car Wishbones. You don't wan't the fit between the tube and bush/housing too tight, quite loose actually. If there is not sufficient clearance between the two components then the adhesive will be "pushed" out when they are assembled giving a weak joint. I use 0.5mm clearance. If you can machine small grooves on the inside of the ally part, this improves the mechanical "bond" massively. Hope that helps. Warren Fantastic advice thanks. Arron Howe, Apex Designs Ltd, Bristol
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nmicro	nmicro posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 15, Visits: 151	Ok. You helped already. Thanks!
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wozza	wozza posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 688, Visits: 5.4K	Hi, sorry if this sound's unhelpful but too much time, research and money went into developing/ testing the Wishbones and the manufacturing process for me to post too much information on a public forum. The tubes I manufacture are oval section and they are produced using a split mould and a bladder. The car they are designed for is sub 400 kg and runs on smooth tarmac. I am not sure that Carbon would withstand the shock loads experienced with off road use. Also the shock mount has to be as close as possible to the hub mounting point so as not to introduce bending loads into the lower wishbone. think most quads have the shock mount mid way along the bottom wishbone ? Sorry I can't give more info but if I can give any advice on your proposed project please ask. Again sorry for the hyjack of the original post. Regards Warren Carbon Copies Ltd Edited 12 Years Ago by wozza
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nmicro	nmicro posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 15, Visits: 151	Wozza, I'm also thinking on fabricating a carbon fiber wishbone for my ATV (Yamaha Banshee), Can you post a photo of the wishbones you've made just as an inspiration for me? What kind of fabric do you use? Do you use a bladder, heat expanding silicone, or a mandrel and shrinking tape? Any help/advice would be great! Sorry for the off-topic Thanks Nuno
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wozza	wozza posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 688, Visits: 5.4K	Hi Arron. Not sure what your project is? but I use Carbon Tube and Aluminium inserts for Race Car Wishbones. You don't wan't the fit between the tube and bush/housing too tight, quite loose actually. If there is not sufficient clearance between the two components then the adhesive will be "pushed" out when they are assembled giving a weak joint. I use 0.5mm clearance. If you can machine small grooves on the inside of the ally part, this improves the mechanical "bond" massively. Hope that helps. Warren Carbon Copies Ltd Edited 12 Years Ago by wozza
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Warren (Staff)	Warren (Staff) posted 12 Years Ago HOT Post Details
Group: Administrators Posts: 2.5K, Visits: 8.5K	Without measuring hundreds of tubes across batches there is no way of telling exactly. +/- 0.5mm is the only data we have from our own experience. The manufacturer won't make any guaruntee on outside diameter. Warren Penalver Easy Composites / Carbon Mods - Technical Support Assistant
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ArronApex	ArronApex posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 7, Visits: 29	Is the variation only bigger or can it be bigger or smaller? Arron Howe, Apex Designs Ltd, Bristol
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Warren (Staff)	Warren (Staff) posted 12 Years Ago HOT Post Details
Group: Administrators Posts: 2.5K, Visits: 8.5K	More or less. We have measured a sample of tubes in the past and that is the tolerance we found. Warren Penalver Easy Composites / Carbon Mods - Technical Support Assistant
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ArronApex	ArronApex posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 7, Visits: 29	Thanks For all your help could you just confirm hat the tolerance is +0.5 or +-0.5mm. Arron Howe, Apex Designs Ltd, Bristol
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Warren (Staff)	Warren (Staff) posted 12 Years Ago HOT Post Details
Group: Administrators Posts: 2.5K, Visits: 8.5K	The outside diameter can vary by as much as 0.5mm dependant on tube size and wall thickness. When you are talking of small gaps like 0.5-1mm then i wouldnt worry about the fitment coming loose. Any void will be filled with adhesive so you will have a solid joint. Warren Penalver Easy Composites / Carbon Mods - Technical Support Assistant
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