eSUN Carbon Fiber Filled Nylon Filament 1.75mm, PA CF 3D Printer Filament, 1KG Spool 3D Printing Filament for 3D Printers, Natural

I am working on an automotive restoration project and needed a filament that could withstand high temperatures and vibrations in the engine bay. When searching for a filament, I stumbled across eSUN's carbon fiber-filled nylon filament, which seemed to check all the boxes. My main goal was to be able to print carburetor spacers and an air filter adapter, and the filament met all my needs.eSUN's filament is rated for heat resistance up to 120°C, and the rigidity from the carbon fiber infusion made the parts incredibly durable against impact and vibration. In my testing, the parts stood up against all the engine heat and vibrations without any wrapping or degradation.To ensure that the printing goes smoothly, I recommend drying the filament for at least 12 hours before printing. I dried the filament overnight and used a 0.6mm hardened steel nozzle, which had no issues during the printing process. The filament maintained excellent dimensional accuracy, with little to no warping.I highly recommend this filament for any automotive project or application that requires strength, heat resistance, and durability.

I print a lot of items that have to be functional and durable. I use nylon almost exclusively for surface RC parts. This stuff is insanely tough. Layer adhesion is head and shoulders above any other material I've printed. Of course printing nylon and especially PA6 is challenging and isn't likely to yield good results on an off the shelf bargain printer.I have printed a lot of generic pa6 with no filler and anything large tends to warp a bit. This material from eSun warps far less than the generic 100% PA6.I print this material in a heated enclosure set at 115°F, 265°C nozzle temp and 60°C bed. Pei coated sitting steel bed with dollar store hair spray for adhesion promoter. I use the recommended 0.6mm hardened steel nozzle. The RC car wheels pictures are 0.4mm layer height and so far it's been nearly flawless. I ordered my second spool in less than 30 days...Nylon of course had to be very dry. I dry even brand new spools for at least 8hrs before printing. After drying I print from a dry box with about 10lbs of alumina desiccant inside.Good luck!

Drying is necessary for sure. 24hrs at 50C.Used on Bambu Lab X1C. Prints fine but supports are nearly impossible to remove. You will need an AMS or dual extruder to use a different type of support material. Once bonded, it is impossible to remove without destroying the model.I used a .6 nozzle to prevent clogging. It is still a bit "stringy" but the surface is nice. Very strong parts but again - supports are a PITA and if you need them on your print, I wouldn't use this filament unless you had another material as the boundary layer.

Update: Despite the critical review below, after some trial and error and arriving on 260C tool / 60C plate for my enclosed/modded Ender 5 Pro, all major issues have seemingly disappeared. The printer is currently nearing almost 30 hours of continuous printing for larger parts (a 17.5 hour job followed immediately by an 11 hour job), which from what I hear, is pretty outstanding for nylon. Taking that into account, changing my rating to 5 stars.Along with the temperatures listed above, I would recommend printing in an enclosure, with the filament in a hotbox set to 55C for the entire duration, using rafts. The filament still oozes pretty noticeably, but any issues caused seem to easily clean up post print. For the raft, keep the air gap down to 0.1mm. While this would be a terrible decision with other filaments, one surprisingly nice thing about this filament is that it easily lifts off the raft, and maintains a good bottom layer thanks to the low gap. It's also worth mentioning that the enclosure is loaded with freshly recharged silica beads (placed in containers at different points of the enclosure). I printed onto PEX with a layer of glue stick. Initial layer 0.3mm, all after 0.2mm, using tree supports for the specific jobs being printed. Hope this helps someone.---I really wanted to like this filament. Purchased after having problems with Overture's easy nylon. One print came out. After the first print, despite printing from an enclosure with a dryerbox set to 55C, I have been plagued with everything from adhesion issues to having to descale my hotend to fix a clog. It oozes from the nozzle at 245 C, practically streamed from it at 260 C, and yet half of the product page tells me I need to print at 260 and above? Figure out the specs, do better. I normally swear by eSun, but this has been an expensive waste of money.

I'm using the same .4mm hardened steel nozzle that I've run dozens of kilograms of PACF through. I usually have a clogged nozzle every 4-5 kg with my other value brand. But this eSun PACF is way worse. I'm only giving it two stars because I'm using a .4mm nozzle and overall the rest of the print performance is good. I do like the PC spool that can be dried at 90C.