SainSmart TPU Filament 1.75, Blck Flexible TPU 3D Printing Filament, 1.75 mm, 0.8 kg, Dimensional Accuracy +/- 0.05 mm

This TPU is flexible, but not stretchy. This is the third roll I have ordered from Sainsmart and I have had nothing but successful results on my old TEVO Tarantula. Be aware that TPU does not like all-metal hot ends - you can look this up yourself. I had a lot of problems trying to print TPU with an all-metal hotend. My Tarantula has a PTFE lined hot end, and prints this TPU wonderfully. It is stiff enough for the extruder to push it through the Bowden tube. I would like to try other TPU filament, but I am afraid I would have issues. Someday, I will take a chance on another brand but, for now, I'm sticking with Sainsmart.

This stuff's pretty awesome. It prints well at 10mm/s through my (long) bowden extruder. Just make sure the area after the filament leaves the extruder gear is closely constrained so there's no gap for the flexy filament to buckle and push out when it's trying to feed. - 10mm/s - 220C - retraction disabled - cooling fan on after first layer I got the TPU in "clear", but it prints kinda milky. Colorwise, it almost looks foamy, but the surfaces are nice and smooth. In my experience it doesn't bridge very well and it can string, but neither is terrible. I recommend picking up some flush cutters to trim the strings; the prints are very durable, and so are the strings! You probably won't be able to cleanly pull them off and sometimes even a razor is tricky to use for cleanup. Layer adhesion is fantastic. Thin-walled prints stretch and squish pretty easily and return to their shape. I haven't seen any delamination yet. A single layer printed on the bed is floppy and droopy like wet paper. Two or three layers are about the stiffness of thick paper. Half a centimeter thick with 25% infill and it's a little less stiff than a rubber spatula. Add thickness and infill and the print starts to feel like a rubber doorstop. TPU is great for printing parts that need to friction-fit together since you don't have to worry about getting tolerances really close. Things will just flex into place.

This filament prints great in both direct drive (prusamk3) and bowden (Ender3). Ive printed about 5 or 6 rolls of the black with consistent results. BUT.... make sure the filament is dry. If it's wet, it will print bumpy and look like it's bubbling out of your nozzle. Even new sealed bags can have this problem. So I generally just dry it by default and the keep in a bag with LOTS of silica gel. I use an old food dehydrator at 122F (50C) for about 5 hours or more. I use a separate temperature controller to keep it at the temperature I set. That's important because higher temperatures can cause issues. Some dehydrators get way too hot. Keep this filament dry and you will be happy! Use glue stick on PEI to prevent it sticking too well. This is NOT super soft and squishy. It is called Semiflex. So keep that in mind. I use it for parts that need to be super flexible and durable. Parts printed with this are almost indestructible. You can't tear them or crack them. This is a good choice for your first flexible filament in most printers. 230C to 240C nozzle temps work well. Start at 230C and adjust as needed for good layer adhesion.

Sainsmart has hands down the best tpu. It prints well, doesn't string as long as you dry it, and is incredibly tough. The translucent filaments are great color matches for kustom canz candy paint (specifically translucent red/ruby red and translucent blue/blueberry). I use it in all my combat robots as armor and for any parts that will take repeated impacts. My only complaint is that the spool is 800 grams instead of the standard 1kg, which is kind of misleading, makes it a worse value than other TPU vendors and unsuitable for larger prints.

I bought this in black and yellow, waiting on the multi-color pack to get back in stock now. I spent a week in hell, as I was new to FLEX and had to learn some things the hard way. Punch line: this is AWESOME filament! The yellow looks like a glowing fiber optic when light is nearby, it is simply marvelous!! They are both extremely strong, but also soft and lustrous. Super elastic. You can take the single skirt extrusion and stretch it to perhaps 10 times it's size without breaking, but the material seems to remain slightly stretched if you do that, perhaps 30-60%, but after that it always snaps back to that size. Ordinary prints are super strong and hold their shape perfectly. Here are the bottom line lessons learned if you are new to TPU: LOOSEN THE IDLER!; start at 15-20mm/s for everything except travel; be certain your 1st layer is dialed in well for this filament; and TURN OFF RETRACTION. TPU will wrap itself around your extruder gear, or jam, and speed and retraction are the enemy here. Get it to print, enjoy how amazing it is and be happy, and optimize from there! I have a Prusa i3 MK3. My original hell began on this, and I naively tried to use the stock profile for Sainsmart TPU (I mean, it was there, right?). It seemed to work, but ended up dying mid print, almost always. Ended up wrapped around the extruder gear. Annoying to open things up and unravel it. Rinse and repeat, no joy. Played with very many settings, read very many blogs. Nothing worked. Finally blew the dust off my MK3S upgrade kit, bit the bullet, and spent a bunch of hours tearing down and rebuilding my extruder. Tried again, this time switching to the much more expensive *good filament* I bought (Ninjatek). IT JAMMED AGAIN. WORSE. OVER AND OVER. Finally, it basically tied a knot around the gear and I had to do a 50% disassembly of the extruder to get it out (luckily the MK3S upgrade anticipates this and it's easy). Ditched the Ninjatek (I really dislike that filament, it's expensive, has a dull luster, is too soft, and even harder to print, what a bunch of overhype!). Read a bunch more blogs, and finally realized the only real problem was trying to use the stock profile. The answer was go extreme at first, and optimize after you are happy and can go from there. Here are the full changes I made to the stock Sainsmart profile to start with: - Everybody says "loosen the idler"....but to what?! I had to loosen the idler almost entirely, for me almost the entire screw head was jutting out, and perhaps 1-2 turns of the screw were in the nut. This is super important, and I found you can find the sweet spot by starting loosest (screw just biting), try to load, and tighten until it loads, then stop! Experiment from there. - Bed Temp 70 deg C - Extruder Temp 235 deg C - All print speeds 15mm/s (keeping fast travel speed seemed fine, if a little stringy) - Turned off "keep fan always on" - Enabled auto cooling - Turned off retraction! (in Prusaslic3r this is in the printer settings tab under Extruder 1) I have so far turned the speed up to 35mm/s for infill and it seems to work fine, others say 40mm/s works. I love this filament. After a week of misery, once tuned in it just works every time, good luck!

Sainsmart 3d printer hardware and electronics have often been a disappointment in the past. So I really hesitating trying this filament, especially considering it is roughly half the price of Ninja Flex (get what you pay for...). Surprise! This stuff is incredibly good!! Using an E3D hybrid with a PTFE liner through the aluminum fin body and another PTFE liner through the stainless steel barrel, this produced the best flex prints I've ever done (NinjaFlex, FilaFlex, Flex PLA). Good layer adhesion, good bed adhesion (Aquanet on 50C glass). It's printed object is a little less elastic (stretchy) than others. I could not get reliable prints using an all metal barrel, but have printed a dozen objects with no feed problems using a PTFE lined barrel. Sainsmart TPU on the roll is very flexible, meaning there can be no gap between the extruder drive gear/idler and the channel the filament is being pushed into - this stuff is a bit more exacting than other flexs for that. 225C produced a very glossy finish. 215C produced a jam. .4 nozzle, .2 layer height 30mm/sec. Slic3r Default Extrusion Width setting of 125%. Slic3r retraction of 1.5mm with a Lift Z on retraction of 1mm with a Retract on all non-print moves. The Lift Z setting takes a split second, which gives the heat chamber pressure time to react to the retraction, eliminating the hysteresis dribble that is so common with flexible filaments. If I can think of other flexible things I want in other colors, Sainsmart TPU will be first choice based on the performance of their black.

I ordered a roll of this TPU in Crystal Orange on Feb 13 2018. As it would turn out I ran out the last of it on Feb 13 2022. I bought it for the color, having seen some amazing prints others had done in this color. I also bought a roll of the crystal blue. I've used them randomly and for about every kind of project. This TPU prints as easily as anything you will ever print with. Extrudes smoothly and beautifully. It almost looks like its just falling out of the nozzle. It is VERY strong. Stronger than any TPE and as strong as any TPU I've used. So its great for protective thingys, but also nice to look at. The color is very dense and vivid yet is nonetheless very translucent. The color really pops under light, and looks even more amazing when its backlit. The filament itself seemed very consistent and never seemed to absorb much moisture nor did it discolor over time. And after exactly 4 years I can tell you that the last foot of the roll looked and extruded just as good as the first foot. So buy with confidence. This is some of the best stuff out there.

Picked the brand as a modeler on YouTube recommended it. Prints great on our BL P1S. My favorite filament type. Little on the hard side (15% infill), but might be something I can adjust with infill percentage. Looks amazing, shiny, and layer lines are hard to detect.

Great product worked well on speed 30, and temp 210, bed temp 60 perfect no stringing using cura and ender 3 V2 with a 0.6 nozzle

This is top quality product - 👌 other brands are just followers...

Para mi el mejor TPU para realizar piezas para drones, es flexible y a su vez rígido, no como otros filamentos flexibles que son demasiado blandos. La configuración que uso en mi artillery X1 es: Temperatura 220, velocidad 35, y ventilador de capa al 100%

Great TPU material from Sainsmart. Used to order direct from China, but shipping times are a pain. Ability to get from Amazon at roughly the same price is a great result. TPU prints out at 215 deg on a 70 deg bed, no stringing and great quality prints. Highly recommend this material for home printing in flexible materials.

Als 3D-Druck-Enthusiast habe ich das SainSmart TPU Filament für eine Reihe von Projekten verwendet und bin von seiner Leistung und Qualität beeindruckt. Dieses Filament hat meine Erwartungen übertroffen und bietet eine ausgezeichnete Basis für diverse Druckvorhaben. Hohe Druckqualität: Das Filament liefert konstant hochwertige Ergebnisse. Die Drucke haben glatte Oberflächen und präzise Details, was für meine anspruchsvollen Projekte entscheidend ist. Hervorragende Flexibilität: Die Flexibilität des TPU-Materials ist beeindruckend. Es ermöglicht mir, Objekte mit variablen Härtegraden und flexiblen Eigenschaften zu drucken, die mit herkömmlichen Materialien nicht möglich wären. Einfache Handhabung und Kompatibilität: Das Filament hat sich als kompatibel mit verschiedenen 3D-Druckern erwiesen und ließ sich problemlos laden und verarbeiten. Die konstante Filamentstärke von 1,75 mm sorgt für ein verstopfungsfreies und gleichmäßiges Druckerlebnis. Starke Haftung und minimales Warping: Das Filament haftet gut auf der Druckplatte, was Warping reduziert und zu einer höheren Erfolgsrate bei den Drucken führt. Langlebigkeit: Die Drucke sind robust und langlebig, was das Filament ideal für praktische Anwendungen macht, wie z.B. Schutzhüllen, Verschleißteile oder flexible Verbindungen. Umweltfreundliche Verpackung: Das Filament kam in einer umweltfreundlichen und wiederverschließbaren Verpackung, was ich sehr schätze. Gutes Preis-Leistungs-Verhältnis: Angesichts der Qualität und Vielseitigkeit des Filaments finde ich den Preis angemessen. Die 0,8 kg Rolle bietet genug Material für zahlreiche Projekte. Fazit: Das SainSmart TPU 3D-Drucker Filament ist eine ausgezeichnete Wahl für alle, die nach einem hochwertigen, flexiblen und benutzerfreundlichen Filament suchen. Es erweitert die kreativen Möglichkeiten im 3D-Druck und liefert zuverlässige und dauerhafte Ergebnisse. Eine klare Empfehlung für Hobbyisten und Profis gleichermaßen!