Polymaker Fiberon PET-CF17 3D Printing Filament Black 1.75mm 0.5kg, Excellent Stable Stiffness - Fiberon Carbon Fiber Reinforced PET 3D Printer Filament, Ideal for Jigs and Fixtures

I recently started using PA612-CF15 filament in my 3D printer, and it's been an excellent material for high-performance, industrial-grade prints. Here's my detailed review:Print Quality & Ease of Use: The PA612-CF15 filament is a 3D printing material that combines polyamide (nylon) with carbon fiber. It’s a bit more challenging to print with compared to standard filaments like PLA, but it produces outstanding results. The carbon fiber reinforcement provides extra rigidity and strength, and the printed parts come out with a nice matte finish. I’ve found that it’s crucial to adjust the print settings for optimal results—slower print speeds, higher temperatures, and a hardened steel nozzle are key to getting the best quality.Strength & Durability: This filament’s main selling point is its strength. It offers excellent mechanical properties, including high tensile strength and low moisture absorption, which means printed parts stay tough and won’t warp or weaken easily. I’ve used it to print functional parts that need to withstand a bit of wear and tear—things like brackets and connectors—and they’ve held up impressively well. The carbon fiber content also adds to the durability, making it ideal for parts that will be exposed to high stress.Printing Performance: While the PA612-CF15 filament prints relatively well, it’s a bit finicky when it comes to adhesion. I highly recommend using a heated bed, as well as a build surface that’s designed for high-performance filaments (like PEI). Once you’ve dialed in the settings, however, it adheres well and delivers smooth, strong prints.Post-Processing: Another benefit of this filament is its ease of post-processing. You can sand, drill, or machine it with minimal effort, which makes it ideal for parts that need to be further customized. However, because of the carbon fiber content, it can cause additional wear on your print head, so you’ll want to use a hardened nozzle to avoid clogging or damage.Finish & Aesthetics: The carbon fiber content gives the prints a unique, matte black finish that looks both sleek and industrial. This is great if you’re looking for a functional yet stylish end product. The finish is slightly rough to the touch, which adds to the overall durability and strength, but it’s also one of those materials that looks even better the more you use it.Overall: PA612-CF15 filament is a fantastic choice for anyone needing durable, strong, and heat-resistant 3D prints. It’s best suited for functional prototypes, automotive parts, or anything that requires robust mechanical properties. While it takes a little effort to get the settings just right, the results are definitely worth it for demanding applications.Rating: 4.7/5Pros: High strength, excellent durability, easy post-processing, great finishCons: Requires careful calibration, can cause wear on nozzles, difficult to print with for beginners

I printed the above image with a stock Kobra Max (260° max nozzle temperature. Although some people suggest it runs hot), 0.8mm nozzle(not a nozzle suggested for small gears)...I have been printing for a well over 5 years and it's not just a side hobby. It's not work but it's an obsession. I've had many printers, I've tried innumerable brands and types of filaments. This is my first favorite. I'm going to write a simple list of why you should buy this filament.By far the strongest filament I have ever used. It's a different kind of strength though. PC FG/cf, peek etc might be stronger in certain ways, But having the same volume as a regular kilogram, yet half the weight, it's just something special. Just a note, the way this filament works is a lot like say porcelain. It's an incredibly strong substance, but if you kind of chip away at it with say a pair of bolt cutters, it'll break easier with scary pieces flying at you.. Kinda like that.Dimensional accuracy is off the charts. You make a hole, the whole will be the size you make it.I only have one printer that prints perfect every time. A toybox printer.. If you know what that is, you'll understand. Anyway, this filament in my Kobra Max, is officially my new most consistent and reliable print. I use Cura to do the "print one at a time" (instead of all at once), and I can have 19 different prints I want done all in that one platform, and it'll just go through one after the other and print them all completely accurate. No more checking every 30 minutes or hour. No need for a camera mounted on it or special failed print sensor...Keep the support material as low density as you can, but when it comes to the support interface and removing this support, it's amazing. The support interface ACTUALLY works...... Really. And once you break off the support which CAN require a lot of strength (ice pick or smaller nozzle size suggested) You're left with a manufacturer quality part. No post-processing necessary.A real quick note, I tried doing the flow reduction for the support material and it ended up failing. I'm sure it's because this material is very thick/.8 nozzle/and printed well below the suggested print temp, But that did fail me. Anyway, I'm sure if you actually have the appropriate setup/settings you'll be fine. Print your support flow to give you ~0.2 mm support line width. Then it should break off super easy, clean and without any excessive strength.Guess that's really all I have to say. Aside from the fact that it also has a really nice texture. Oh, and make sure you use "alternate wall printing direction" or something like that. I'm sure even if you use a smaller nozzle size, there will be a little pull like with metal field or glass filled filaments. You want to make sure it changes direction each layer to avoid that warp and shit. If you use Cura, the newest update has that option in experimental or somewhere at the bottom.This is my summary. I'm using a stock printer, oversized nozzle, and very little is done to try and accommodate this filament suggested print settings. I'm honestly not even sure how it works.But regardless, I'm getting manufacture quality parts. Truly functional.I have every other filament. And although some might have higher strength in certain areas(and usually some disadvantages), but they all require some specialty equipment, tons of work to get it to stick or print clean. High build plate temperatures that waste electricity and often result in warping.And so on and on.And maybe ridiculous for me to say, but I think this is the best filament ever produced...(Aside from basic PLA for prototyping).I just want to know if it comes in 5 kg.