I have a design to try out that requires a small tube with an inner diameter of 6.02mm and a maximum tolerance of 0.01mm, with a total length never exceeding 24”. I am currently in tech school so I have access to a filament winder, water jet cutting table, and some CNC machines.

Right now I’m thinking the best course of action is to find a tube with this exact size and wind carbon around it, then hope it stays true to size after curing. I have some carbon tubes from cutting carbon arrows, but I’m not sure their diameters, nor do I have the means at home to machine them down to exact inner diameters.

So I have a few questions

1. What is the best way to get this done, using tech school machines or otherwise

2. How can I make this repeatable at home if I wanted to manufacture and sell these at a higher quantity? What machines or tools would I need?

I recently started reading about forge carbon fiber, used in many top end cars. Then I couldn't find who makes them.(except the above mentioned sectors). Like is there any market for this? Just wondering..

I’ve applied 3 layers of west systems 205 and 207 while in tack stage about 20 hours ago, it was sitting in my garage in around 55 degrees and then I took it inside and put it in my bathroom and cranked the heat for the last 2 hours. It must be 90 degrees in there!! It feels pretty hard but I can still leave marks on it with my fingernail.

Will it be cheaper than buying steel tubes if you make it yourself?

Good Afternoon Brothas, it’s 3AM here, but I have a project upcoming, and I do not want to use steel. It’s heavy, and hate handling it. But carbon fibre is so expensive. If I source the material (or can I make it at home… look man I don’t know), and make carbon fiber tube at home, will it be cheaper than buying steel or metal tubes?

I am working on reducing the print time for 3d printed PLA molds for composite layups (room-temp). Since we are placing the mold into an envelope vacuum bag, I am concerned about the mold collapsing or bending under pressure. Does anyone have experience with the number of walls or infill type used? Or what impact the number of walls or infill type has on this?

Thanks!

Hi, yesterday i bought used carbon road bike and today i decided to go for a ride. Everything went awesome until i didn’t noticed that pavement ended and fell off the bike. When i returned back home i was really woried about the bike, so i decided to inspect It and discovered this. Am i fucked ? This is my first Carbon road bike and i spent 450$ on it (TREK Madone 3.1) i think it was released in 2014. Should i be worried about that and if it’s bad how much is it gonna cost to repair it. I really need your thoughts on that because i'm just a poor student and i bought the bike to work as a food delivery courier, is it gonna last until the summer end ? If yeah it's fine.

https://preview.redd.it/gb6k6g44dywc1.jpg?width=4032&format=pjpg&auto=webp&s=c7aabdec6009f454644e07e14a33678fe11b8764

https://preview.redd.it/v4iiigt9dywc1.jpg?width=4032&format=pjpg&auto=webp&s=518dd3c638e509a56edf572628c4828c910504df

There’s heavy rains for a while where I live and I want to get this job done ASAP. Humidity is high, temps are low. But if I keep my garage closed and have an indoor safe gas heater will I be okay? Do I need to vent the vapor coming off the epoxy? If so how would I do that without loosing my heat air and introducing cold humid air?

Any other precautions when working in colder weather with high humidity?

Hi

I'm building quite the powerful electric outboard. The "mast" of it had a wood skinned carbon fiber rod for stability but I want to give it an aerofoil shape and displayed on the image.

In the center goes the carbon fiber skinned (many layers) plank which holds the load/stresses.

Buy this shape... I was thinking about using like 1.5kg PETG to make it quite dense and get a nice shape to put a layer of carbon fiber around mostly for looks. But I'm thinking that maybe the summer sun and black carbon fiber could make that melt and become deformed. Also this shape 3D printed part around the mast adds a lot of weight (2kg filament roughly) and ... Maybe I should just print the front and back shape to create the holes and front/back shape for less resistance. Then add like three layers of CF straight against my mast which should then also help with strengthening the mast even more. That is a major issue since it's a 25hp motor (20kw).

But to filament... What filament sticks well to Epoxy+CF plus doesn't melt if the mast becomes hot under the sun? I have a Qidi X Max 3 heated and enclosed so most existing filaments are not an issue. How about ASA? I heard nylon doesn't bond at all to Epoxy.

Hello guys, pardon me if this is not a topic for this group, but I am in drone industry, and I want to start my own company where we will do CF parts, but also open door to uav manufacturing in a long term. I didn't run a business before, but I had very good feedback from community in Bosnia and Herzegovina trough this UAV manufacturing project, so right now I'm doing business planning and budget plaining, so It would help me so much if someone could point out MUST have equipment for CF manufacturing. I have decent CNC mill and 3D printer so far which I plan to use for molds, but other than that I am really not sure. Also any advices how to find eventual partners or clients?

I got some 12x24" sheets of 1/8 thick carbon fiber. A friend of mine gave it to me, he got it free from work. (He works aerospace, it was inappropriate for the application for whatever reason). I have 5 sheets total, and with my hobbies being tinkering with stuff and cars, I want to make stuff from it for my car. I have diamond cutting disks, and diamond tipped dremel bits to shape it, but since it's pretty thick and already cured it isn't very shapeable.

My only use for it so far is to custom make a heat shield to go over the turbo off the back of my motor, the old thin metal one was rubbing into a line for my heater core, so I removed it. Before I make one I want to make sure it will not end up melting it, or ruining the look. I'd guess temps are around 400-500 degrees back there. If it will not handle that, anyone have some thoughts on what I could do to protect it?

I was thinking a metal layer on the underside riveted to it, or a layer of heat reflective tape, or even a high temp black paint. I already have a fiberglass turbo blanket over the turbo, otherwise I would guess 6-700 degree temps.

It is my first time working with carbon fiber too.

I'm trying to sell an MVP Innovator, 24 cfm compressor and approx. 2000 yds (uncertified) carbon fiber. Is there an online market place, that you guys could point me to. Thanks in advance

Carbon Mtb frame finally finished, accept for one issue, and this is the only one I have yet to come up with a solution for. The headset cups are not aligned. This was partially caused by laziness when I was sanding them down to make the cups sit flush, and I forgot to check the square. They are both angled in the direction of the red lines in the picture. My attempts so fix it have made it worse from misunderstanding what direction material needed to be removed. The direction it needs to be removed is not possible because the cups are not raised up at all, it would just dig into the top and down tube if I sanded it down. My thought was to add an angled shim in between both of the cups. But that also lifts them out of the frame, which could reduce the strength of the interface. Any other ideas would be appreciated

Hi carbon fiber friends. Is it safe to use a regular two-part carbon fiber/fiberglass epoxy to help strengthen the stainless steel tab with a hole (which I will solder first with a soldering gun w/ stainless steel flux). This hole is where the screw that goes into the plastic handle is screwed in (it's flap welded on the sides into the round body of this small electric pot/lunch box with a hole- amazing tool for those who don't want to use big kitchen stove and cookwares and for portable cooking and food storage).

If the carbon fiber epoxy is safe to use (it can boil water to a rolling boil, I take the surface is less hot than 100C), is it also safe to use carbon fiber cloth around said flat to strengthen it even more. I will use blue or red threadlock as well.

Thank you. God bless carbon fiber users.

https://preview.redd.it/3uq4eeb1l5wc1.jpg?width=1331&format=pjpg&auto=webp&s=2713b11c3bfd4445e89c1d0689c8b30787bf1c9b

Hi carbon fiber friends. Is it safe to use a regular two-part carbon fiber/fiberglass epoxy to help strengthen the stainless steel tab with a hole (which I will solder first with a soldering gun w/ stainless steel flux). This hole is where the screw that goes into the plastic handle is screwed in (it's flap welded on the sides into the round body of this small electric pot/lunch box with a hole- amazing tool for those who don't want to use big kitchen stove and cookwares and for portable cooking and food storage).

If the carbon fiber epoxy is safe to use (it can boil water to a rolling boil, I take the surface is less hot than 100C), is it also safe to use carbon fiber cloth around said flat to strengthen it even more. I will use blue or red threadlock as well.

Thank you. God bless carbon fiber users.

https://preview.redd.it/3uq4eeb1l5wc1.jpg?width=1331&format=pjpg&auto=webp&s=2713b11c3bfd4445e89c1d0689c8b30787bf1c9b

I breathed dust from sanding it for like 10 minutes. Now im coughing, wheezing, and had limited breathing.

Its been 2 days and im starting to get better.

Will it leave my lungs over time?

Hi

I'm planning on skinning a 12mm steel rod with carbon fiber, mostly for looks but some extra stiffness would be nice too.

I saw a video where a guy first laid CF with epoxy on a tube and then used some form of tape to press the CF tightly against the rod. But no mention of what tape he used. The tape pressed excess epoxy out and created a nice CF tube.

What tape doesn't stick to the epoxy so that it is easily removable? Or should I just use bleeder fabric with vacuum bag?

Cheers

Hi. Just had a question about a car panel.

Is this genuine carbon fiber or abs plastic with a pattern design?

Any help is appreciated. Thanks.

Just wondering if this is repairable or not, or even worth repairing(a new front lip is $500). The split seems to have gone through the clear coat and to the carbon fiber. The split is about 8 inches long. I have 0 experience with carbon fiber repair, but I'm always down to learn something new and I almost always DIY everything.

Hello! This is my 4th time making carbon fiber and I got an unusual amount of air bubbles in one part of the molded part. Any ideas what it could be causing this? This has never happened before. I degassed all layers making sure to also lay the layers in a way that trapped a minimal amount of air. I patted it down with a brush to make any air inside come out and everything. After in the mold I occasionally heated the mold. I'm thinking perhaps the inconsistent heating made them appear. Another suspicion is that the resin simpliy flowed out from the side of the mold. The mold is a 3d printed 2 part mold.