Polymaker Fiberon PA612-CF Carbon Fiber Nylon Filament 1.75mm Black 0.5kg, Fiberon PA612-CF Strong & Low Moisture Sensitive Nylon 1.75mm 3D Printing Filament

This review is for the PA6-GFMy settings: Neptune 4 plus with enclosure, Microswiss hotend and upgraded fan shroud. Nozzle 290, bed 50 (yes, only 50). And you definitely need a hardened nozzle AND hardened gears.I was blown away by how easy this is to use. I have more consistent success with this filament than even PLA. The parts are incredibly strong, I was able to thin the walls of some of my prop designs from 12mm in PLA Plus to 4mm with this. It also had a slight flex to it which helps with impact resistance (so it won't just shatter).They also look great! Layer lines are hardly noticeable even at 0.2mm layer heights. It comes out with a rough texture that can be sanded. And so far I have had no adhesion issues. Supports usually snap off, although sometimes I need to use a razor blade on the tiny supports where they meet the print. Still, no worse than PLA.That said, there are some things to keep in mind:You have to print from and actively heated filament dryer. I splurged and got the EIBOS Polyphemus dryer, which was $150ish. I wanted it anyway but a good dryer that can consistenly keep the temperature at 70 is a must (70C is what I use for all prints with this filament).I also print with an enclosure. I'm not sure if you need it for the filament itself, but it gives off toxic particles. I have an activated carbon filter running at all times in the enclosure, you should too.Lastly, this is fiberglass. Working with fiberglass is dangerous, ESPCIALLY inhaling any particles. I recommend handling the prints with gloves (they have a rough texture and there's a risk of tiny glass splinters). And ALWAYS use a respirator when sanding these parts.At $120 for 3kg it's not a bad deal. I've stocked up on some rolls in case of coming tariffs, but I'll definitely be using this for a long time.

I’ve been eyeing this filament for a while and the only reason I didn’t buy it was because I was unsure if my printer could handle it. I have an Elegoo Neptune 3 Pro which only allows up to 260c due to the PTFE tube not being able to handle higher temperatures. However, I put in an upgraded tube with higher temperature resistance as well as a hardened nozzle and cranked it all the way up to 260c. It came out absolutely perfect. No problems at all not even a slight bit of warping. Even though I used 100% infill, the print feels light and when you tap it, it almost sounds like metal.

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

To the Polymaker Team:I'm struggling to get started printing and CNC machining, due to a lack of startup funds still. Can we work something out to get some more filament, until I make more money to buy it from y'all? No is an answer that I'll take. But I wanted to try.First thing is first! This stuff can print super intricate stuff. Also, it doesn't try to permanently stick to texture PEI plates like other nylons. Also, I printed at 10³mm/s with no issues. It was .24mm layer height with a .4mm nozzle, .4mm width at around 100-110mm/s speeds. IMPRESSIVE!I will only buy Fiberon nylon from here on out. I doubt another company can top this stuff.I have BBL PA6-CF, but it's a bit more expensive and the shipping sucks.I made a fork latch for my gate, since I hated the OG swivel latch thing. The BBL PA6, became too flexible after 3 days. (As plastic absorbs water, it becomes more flexible, but more impact resistant, but I need stuffness) It did rain a ton tho. But I kept having to tighten the bolts on the bracket as it softened.This Polymaker Fiberon PA612_CF15!?! Well, it absorbs less moisture and it still super rigid.