Professional Carbon Fiber Bike Frame Repair
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- Опубликовано: 27 авг 2024
- This video was created to show how a professional repair can be made on damaged carbon fiber bike frames. It details every step and includes key information to achieve a successful and structurally sound repair. For more information about our carbon fiber bike frame repair service, copy-paste this link to your web browser: www.compositedi...
*Great **Latest.Bike** , good looking, good suspension and love the gearing. I've tested some bikes that were more then twice the price but not as good. Get lots of looks when riding.*
As a carbon aficionado and composite enthusiastic. I have to admit that within all my bikes, the best one, and the best feeling riding wise are the steel one. I have a few carbons, but steel is real.
yes, try columbus (the white bird) and tange (japan) , thier very stiff feel
The quality of your repair looks great I'm just wondering how it is valid on a structural level. We all know that CF's strength comes from the fibres themselves and the bonding between them. In this case, since you clearly have broken fibres and no bond between them, applying epoxy and patch on top does the job? Or from the structural point of view, the frame will be slightly weaker?
ruclips.net/video/k7e004bfHyY/видео.html
A good job Although a pro team would use low temperature curing prepreg and a layer of shrink tape to prevent wrinkling
Im an advanced aircraft composite repairer, and this is in no way a complete repair, its a temporary patch at best.. no scarfing of the original damage, no weighing of resin to ensure a correct ratio, the fiber direction isn't matched...
hi Chris,
I'm in Canada btw and I will ask you my question if you dont mind.
I'm planning to put a powerful hub motor on a Santa Cruz V10 XXL 2020 in Carbon fiber. In order to do that, I would have to build custom drop out, because it would'nt be thru axle anymore. I was wondering if you think it's something possible to do and how I should do it. Maybe I could just modify the original drop out by adding carbon fiber, having like 3 holes to screw a steal or aluminium plate on each side that would have the shape to receive the hub?
thank you!
Chris_R Totaly agree no idea of orientation of the ud as most frames should have about 5degrees off parallel to the tube ,like you said it's just a patch ,and this is what most "pro" bike repairers do !!
@@kismetbikeworks4946 Its the reason im thinking of opening my own repair shop here i the UK
Chris_R dude I did that 8yrs ago sold up 2yrs ago because I got fed up with staff and customers,it got to the point where I was doing repairs as fast as poss to keep customers happy with times but paint took lot longer than repair ,it's a curt through the job unless you work from home like I do now but I don't get involved in repairs unless some one finds me " I'm now making pre preg parts as kismet bike works Ltd and kismet_carbonbikes on Instagram work from home my own boss never happier "...good look on what ever you do cheers darren
@@kismetbikeworks4946 yeh I currently run a wind turbine blade repair company, but owned a custom paint and bodyshop for 9 years doing repairs and airbrushing etc, also an advanced aircraft composite repairer so have all the skills to do everything myself. Checked out your site, I'm only in Lincoln ha ha.
you need to sand more of the original material and replace it with the new material. the broken part is still down there
The thing that always concerns me about the use of carbon for bikes, more so mtb, is barely visible impact damage. I would never feel safe if a bike had rock strikes and appears d to have superficial damage. I can't see how tapping the frame can be a safe enough way to check for delamination and a lack of structural integrity beneath the surface layers.
Your concerns are valid. But like mentioned in our previous reply, the 'low-tech' tapping technique is surprisingly effective at detecting dead spots. Sure... it is not 100% guaranteed, and everyone attempting to fix a damaged frame show take into consideration all the risks involved. Repairing damaged CF is still a "black art" that can only be acquired by lot's of experience. In our case, we've repaired dozens of frames without a single failure. Nevertheless we always advice caution.
@@compositedimensions3844 It really is effective! I am a composite materials inspector and I use a composite tap hammer to check critical parts in the field.
Tap test is an approved procedure on aircraft composites as well
carbon front wheels are only thing to worry about...99.99999% carbon dents will survive enough the impact to keep you safe on your seat...front wheels???
Now we fix this "using latest techniques and processes"..."taps the frame with a coin" 😂😂😂
Great video tho and amazing work! I just thought that part was really funny! I was expecting a device that scans the frame or something but taping it with a coin was a surprise
Are you sanding down the fibers of the patch or just the resin on the surface?
damage should be sanded down to carbon for sure.....on repair sanding just the surface layer epoxy for the "shine"
wow what a video. Its good to see how it should be done. Thanks!
Very good video !!! Helpful !! The only thing is that your video is too noisy!! The music 🎶 is too load should be more relaxing music !!! Because very hard for concentration!! Thank you again !!
Good job. But I have a doubt, when you use this technique, will be the local of the repair a little more thick?
This guy has the balls to call it a professional repair but he got absolutely everything wrong.. Didn't sand it down enough, used the wrong grade and pattern carbon, the fibers are not oriented correctly, it's bulgy in the repaired area which messes the balance of tention forces in the area which will also weaken the opposite side putting it constantly under more stress..
This is a rookie job that i wouldn't pay a dime for cuz i know that I could do a better job than this "professional".
plz post yours so we can see professional work by you
@@v90cross2 mind you that I did not claim to be a professional.. But I recognize fatal errors when I see them..
Plus I wrote what mistakes he made and he had 7 months to prove me wrong..
This is just a commercial to sell a product and you don't expect them to be fully transparent or professional when they're convincing you to buy it.
Anyway there are some better videos that show how it can be properly done and they don't even claim to be professionals.
@@v90cross2 ruclips.net/video/1WRDEu1rrcM/видео.html
Just in case you're really looking for good content and not mocking..
Here's a pretty good video of doing a pretty professional job by an ordinary guy (he even admitted not being professional and not having the proper tools and yet did a far better job).
Thanks, great video!
I really love this lowlevel Engineering
I guess no X-ray of the initial damage, or of the rest of the bike, before or after. You add a bunch of carbon over the damage then sand it off to make is flush. This seems to be a very nice bandaid. Likely serviceable for a time if you are riding around the block, but on any sort of a decent or any technical stuff? Not me.
valid, good enough, not for carbon front wheel though
good video
how much was total cost of repair ??$ 300 USD
Hi,
very nice video by the way,
I'm planning to put a powerful hub motor on a Santa Cruz V10 XXL 2020 in Carbon fiber. In order to do that, I would have to build custom drop out, because it would'nt be thru axle anymore. I was wondering if you think it's something possible to do and how I should do it. Maybe I could just modify the original drop out by adding carbon fiber, having like 3 holes to screw a steal or aluminium plate on each side that would have the shape to receive the hub?
thank you!
Fantastic video! I feel it was quite thorough and just the right information.
Did you leave the vacuum pump running the entire time of the cure process? Have you ever decided to cure the composite using an elevated temp or is that entirely composite dependent?
thats is for space shuttle rocket, but if your repair isnt drying , still sticky after 4 hours, you must use hair dryer a little to heat the work to at least 85F...epoxy will NEVER EVER CURE BELOW 55F NEVER
Nice job!
This isn't how you repair a frame.
they need to remove at least two-third of the original broken material and replace it with the new material. this is just reinforcement. the crack is still down there.
I agree. This is a patch not a repair. I have seen more thoughtful repairs from other providers that take into account the original characteristics of the area damaged and try to replicate those by well considered layup of unidirectional and cross weaved fibres. Those repairs are undetectable when done and repainted.
no ultrasound probe? you may miss something... check out Raoul's vids
Sure...you can take your frame to a specialized lab to perform a comprehensive ultrasonic probe test, but the cost of doing so often exceeds the cost of a new frame. In our experience, the 'low-tech' tapping technique shown in the video is surprisingly effective at detecting dead spots. And to ensure all potential non-visible damaged areas are treated, we always extend the length of the repair beyond the visible and audible areas.
budes matpicu 2. G
Excellent!
yeah, not a bad job, how much did that cost the bike owner ?
Owner got lucky the break wasn't where the decals are.
I hope i never have to try a DIY fix at home.
Lastly, for riding around on the street this fix is more then enough but i'am not sure how aggressive trail riding would hold.
thanks a lot its very helpful
Thank you for viewing. Any questions, please let us know. We are always happy to help.
One question, any dead spot should fixed regardless the size and location?
Yes, all dead spots should be carefully identified and fixed accordingly whenever possible/feasible. Otherwise micro-cracks could propagate as you continue to ride and apply stress on your bike, which could (in a worse case scenario) result in a catastrophic failure of your frame in terms of shearing and/or denomination of the material...not to mention the potential bodily injuries such failure can cause you. Always ride safely!
Where can I buy this carbon fiber patch?
Hello, why do you selected the fiber 3K and 200 grs/m2 for this work?
I selected it for several reasons: 1) 200g/m2 when compressed in a vacuum it yields a predictable thickness (approx. 0.25mm/ply). So for example, if you're aiming to achieve a 1mm thickness, you would apply 4 plies. 2) 3K is one of the most common types of carbon reinforcement, and offers excellent draping and wetting characteristics, which are essential for conducting a repair of this type. 3) Mechanical properties; and 4) This particular fabric comes partially impregnated with a resin binder that allows the weave pattern to keep perfectly aligned during handling and cutting with no fraying. I hope I answered your question. Cheers!!!
Thanks for the information, very helpful.
Ideally, would matching the existing carbon weave and density be optimal? Also have you had luck with scarf repairs? Thank you in advance!
Canten Fife yes I’ve been looking into papers on scarf repairs aswell... have you learnt anything more about them in practice?
great video!.. Could you please let me know what kind of material were used for covering number 2 (Peel-ply layer) and number 4 (Breather/bleeder cloth)?...I am in Colombia...that's the reason because I can not purchase your kit...thanks for your support!
How about the crack beneath? This is just patching the surface, rite?
Hi-tech room but your camera is focused on the background.
hi i'm not sure if i measure incorrectly with the kitchen scale i end up doing a 2 to 1 ratio for 3 oz total and i ended up with a plastic cup looking like 2.5 inches of volume/height of liquid....do you set the scale to measure in ml or oz? i set it to oz and pour liquid until it read 2.0 or is it 0.2 consider 2 oz on the scale??? i wasted all the resin in the bottle....which could be use for more than one repair...so i think i measure wrong or used more resin and hardener that was needed for my actual repair...please let me know if i did indeed measure incorrectly??
Hi there, what is the mix ratio ratio of your resin/hardener? We use grams as the unit of measure, but oz is just as good as long as you use the correct mix ratio.
2 to 1 resin to hardener...could you tell me what this would be in grams for the scale and also for oz if i were to use? is oz suppose to go by number after the decimal ?
1 gram = 0.035274 oz, 1 oz = 28.3495. Despite this, the resin-to-hardener mix ratio is irrespective of which units you use. In other words, a 2:1 ratio means for every 2 oz of resin you need to add 1 oz of hardener. Likewise, for every 2 grams of resin you need to ad 1 gram of hardener.
i used oz as unit of measurement for my scale but when i pour resin i pour until number says 2.0 on my scale and it was like 2 inches in height the amount of resin in my cup that is way too much??
1 gram to oz = 0.035274 so about 56.699 g that is 2 oz of resin??
Sorry, but I doubt the method of only sanding the surface to reapply carbon fibers. Around the 6 min mark you can see that the crack affects further layers, hence the repair should be extended to further depth.
What did you use that you put in the cup
From other videos on this subject it would suggest this isn’t a great way to repair. No ultrasound or X-ray, no consideration for the directional layering and then actually sanding the carbon fibres comprising their strength. The repair also looked a lot thicker than the surrounding area, surely now there will be additional load and flex either side further compromising the frame?
lol specialized are in every repair video, the most robust frames on market.
Yeah, im sitting here watching this with my cracked Specialized Tarmac in the garage🤣
And I bet it has nothing to do with the fact that they are one of the most popular bike brand in the world?
Campuran resin:catalizer brapa?tks
Could you have sanded it down even more so wrapped cf won't form a visible bulge at the finish?
Not really. In doing this type of repair you are essentially trading a bit of cosmetic appeal in exchange for saving your otherwise broken part. Trying to sand the repair area to be level with the original surface runs the risk of compromising the repair itself, hence rending the entire process null.
@@compositedimensions3844 I think this problem can be addressed with a Pipe in pipe technique. please try it out in order to achieve perfect surface finish. that would involve taking/making a smaller dimension pipe than the one to me fixed. inserting it inside and then applying carbon patch on top of that to fix the broken outer pipe/tube. it would increase the weight but that would be negligible, and would reinforce the pipe/tube.
Hi I notice you guys require a few type of sand paper what's the difference in the few required and which one will we end up using?
We use progressively higher grit sand paper from coarse-to-fine starting with 120 grit. The sequence is: 120, 240, 400, 800 & 1200 grit. The higher the grit number, the finer and smoother surface becomes. Each grit removes scratches from the previous one as you move upwards through the grits. We recommend wet-sanding starting with 240 grit. An optional polishing compound can then be applied afterwards in order to achieve a fine high-gloss finish.
your kit it only comes with 120, 240, 400, 800 but not the 1200?? can i use a different grit sand paper if i wanted like 220, and 320??
Sure, just use them progressively.
the video didnt show the 240, 400 and 800 usage of sand paper or am i missing it when watching??
Why allways u leave that ugly bump instead od sanding down the tube until leave the uneven surface and then do all that carbon wrap!
Because of......structural integrity?! LOL
Because if you sand the sleeve down to the original shape, guess what? You've sanded away all of it and are back to the cracked frame. Only way to keep original shape is to scarf join, which is also much stronger than a sleeve.
Is it necessary to use vacuum ?
If you want the best possible results yes. On the other hand we developed a simpler repair process without the need to invest on a vacuum system. Here is the link to that video: ruclips.net/video/DHWsTg9mkTg/видео.html
what is the name of the materials that were used?
Thanks for the question. Please check out our video called: Professional Carbon Fiber Repair Kit (link: ruclips.net/video/ZGw1F0WcDsI/видео.html). In this video I talk about each material used to make this particular bike repair in more detail. I hope this helps. Cheers!!!
can i send you my JDM carbon rod....it broke in half
Any supplier of these materials that ship to Mexico?
Hi, sorry for the late reply! We were on vacation. Unfortunately we stopped shipping CF repair kits outside Israel as due to the complicated procedures required to export "hazardous materials" (i.e.: epoxy resin/hardener).
Do the same on other side just in case :)
Anybody buying this BS, the entire time he is tapping on frame, im thinking, just start the repair.
that is 100% sheit ..pure trash. the frame needs to be thrown out. it is garbage..this repair job is just a band aid .....if I saw a rider with this I would laugh.
I would just throw that frame away and buy a new bike. Repairs are pretty costly and I'd rather just apply that money to a new frame.
"in this video, we're going to show you how we repair Specialized brand bikes, because their frames suck ass"
This guy kind sounds like Cooking with Dog.
Wow xxintro noice
The best way to repair carbon fibre bikes is this; 1 throw the carbon fibre bike in the garbage. 2 buy a steel bike.
There you have it, simple easy and results in a great riding bike and a repair that will last for years......
The bike is solid and my Ebike conversion went great. ruclips.net/user/postUgkxHL1v1R3NE5x4KiYfyt8dnQmyNYz7qi5L Very smooth ride at 30mph with no problems (135 miles ridden so far). The picture is a bit deceiving - there is WAY less space in the center of the frame than it shows. The suspension connection takes up the entire thing. So I needed to attach my battery on the bottom of the frame and my controller on the top. Instructions for assembly were lacking but honestly it wasn't too hard to figure out even though I have very little bike knowledge. Watched some youtube videos on adjusting the disk brakes but that was it. Still, I am loving it and very happy with the purchase.
you must invest in a lav mic and pay a tech to make a proper video. if YOU are not willing to invest in that small amount of outlay, I am NOT willing to pay you to repair my bike. i can't take this low rent video seriously, sorry.
your fuquing ears suck.
If you can't easily adult (verb) enough to comfortably watch this video, then you are impressively pathetic.
It's really pretty special. your kind deserves to be left on the sidelines, and in any difficult endeavor which isn't a passion of yours, you will be.
C'est pourri comme réparation ......
This is a very bad repair job. Carbon fiber isn't fixed this way. no matching of grid, no weighing of risen, no cleaning of the crack, no sub support... this is a DIY quality at best
All he has done is Bandaged an Existing Crack, that is not going to work.
Put a little light on it dam
Shyte sound
BULLS EYE
Total non sense with „sound”
Much as a carbon frame cost, it shouldn't break at all.