Redrex Dual Gear Ender 3 Extruder with Two Washers Metal Drive Feeder Upgrade Kit Compatible with Creality Ender 3 V2 Pro,Ender 3 Neo Series,CR10 3D Printer TPU Filament Supported(Motor Shaft>20mm)

This all-metal feeder is a great upgrade to my old Ender3 v2. After I figured out that my stock feeder was slipping I found this. I am very happy with this product. The frame and lever are solid aluminum and have a nice red anodized finish. I had one or two imperfections but they were in hidden areas and did not affect performance. The dual gear seems rock solid and I should never have feed/retraction issues again. Remember to update the E step to 139. My through-hole alignments were perfect and I did not see my filament getting sliced. The kit included everything I needed to swap out my stock v1 feeder (system upgraded to v2). I took my old assembly apart and measured it to ensure I had the correct Z-axis stepper 22mm shaft. There are illustrated instructions that I referred to when my intuition failed me. The spring with spring sleeve was hard to get in - I used the metal spatula to help slip/leverage it in, then turned the screw and found the hole. Disregard the reviews that state/show you that the screws are short and the whole unit is loose - I believe they are 'dry-fitting' the housing directly onto their stepper, without the bracket in between... This simple upgrade revitalized my old, humble, Ender3. It's working great and I recommend it.

This dual-gear upgrade is a night-and-day improvement over the stock plastic single-gear extruder. Installation was remarkably quick and easy. The dual-drive gears grip the filament evenly, completely eliminating slipping and under-extrusion issues. Essential upgrade for any Ender 3.

This ungeared (i.e. 1:1 stepper torque) dual extruder yields significantly lower feed pressure compared to the stock extruder from my Anycubic i3 Mega with 3:1 gear reduction, and that may be a good thing. My old stock extruder left a stronger bite in the filament when flowing normally, and severely chewed into the filament during hotend stalls and jams. In contrast, this dual gear extruder leaves a gentler (2-sided) bite during normal flow, and when the hotend slows down, the stepper motor cogs before the filament slips and chaffs. The end result is there's no noticeable chew in the filament after jams. Great! I don't need to trim filament anymore after jams. The downside is that I'm not certain that this extruder generates enough torque to overcome slight fluctuations in resistance. When I see thin flow, I can augment feed pressure by manually pushing filament into the extruder, and this often clears onset clogs and restores flow. This tells me that a little bit more torque would help steady flow. If your hotend is healthy then this extruder may work well for you. I'm switching to a dual gear extruder with 3:1 reductions (while also upgrading the hotend to fix other problems). If the geared extruder chews filament then I may switch back to this one. The recommended esteps value 139 steps/mm worked perfectly. I chamfered the filament inlet hole in the main block per other commenter's recommendation to avoid chaffing. Filament loads easily and naturally in this extruder compared to my other one (a cheap BMG dual extruder clone). The clutch lever on this one is awkward to grip. Assembly took a little bit of figuring (instructions are incomplete), but it didn't take long. Feels solid and reliable overall.

Recently got an Ender 3 V2 neo and was really struggling getting the printer going and having good prints. Adhesion and extrusion problems galore. The extruder on that printer is all metal, which is great, but the design is terrible. I could easily pull the filament out without pushing in the gripper arm, even after adjusting the spring tension. So it had to go. I'm not sure if this is the best replacement, but it works and it's great for the price. I can actually print now! Installation wasn't too tricky, but it is a bit involved. Especially getting the spring on and tensioned correctly. Sometimes the gears on this don't grip right away but it does eventually click and works really well. There is a lot of filament dust that it creates so it wears down the filament more than the default extruder. Not sure if that's an issue but so far so good. When it's time to replace this, I will probably go higher end as it's just too important a part to skimp on. But at least compared to the original part, this is an exceptional and needed upgrade.

Bought this extruder for my 2020 model CR-10 after I had inconsistent extrusion and skipping on my prints from my aluminum single gear extruder and tried everything else I could think of to fix it. A few things off the top of my head: -As other reviews have pointed out, this version of the low-cost dual gear design includes washers to prevent the gears from grinding off the aluminum as they turn--this is the only one I've seen on Amazon that acknowledges that design flaw! -An issue that I HAVEN'T seen in reviews (probably because it's such an obscure upgrade) is that, while it IS compatible with the CR-10, it's not perfectly compatible with the PrinterMods direct drive upgrade right out of the box. This extruder is substantially thicker than the stock Creality one the PrinterMods upgrade is designed for, so the M3x25 screws included with that upgrade are /just/ too short to mount the motor + extruder to the printhead, and the screws you get with this package DEFINITELY aren't long enough to do the job. I'll update this review later to see how it works in action, but PrinterMods users--you WILL need to replace the two M3x25 screws you used to mount the motor to the printhead with M3x35, and I recommend adding a matching nut to ensure you can screw it all the way in. (It's overkill, but I ordered the iexcell M3 screw variety pack with the 50 nuts and five different lengths of screws--it's only ~$9 on Amazon though, so unless you found a cheaper M3x35 nut and bolt pack, that's what I can personally recommend.) -Definitely recalibrate your e-steps after you install this--in my case the included suggestion of 139 steps/mm was spot on, but it doesn't hurt to use this as a starting point for your calibration, since either way you're going to need to bump up your e-steps from stock for this kind of extruder. -If you're confused on how to install this, check out CHEP's video specifically about installing them. The included instructions are pretty vague if you haven't done extruder upgrades before, but I think that video is super easy to follow for beginners. Like I said, so far so good--after calibrating e-steps this extruder consistently extrudes the amount of filament you tell it to, has a firm grip on the filament without grinding it down or biting into it too deeply (at least with PLA--I'll see about PETG and other filaments one of these days), and shows no sign of slippage. Again, since I need to get longer screws to mount it on my particular setup, I'll update this review later to see how it works extruding hot filament proper, but if you need a solid dual gear extruder and don't want to break the bank, get THIS one! UPDATE 9/14/22: So I managed to finally get this thing mounted and tested extruding hot filament and it works beautifully! I won't knock off a star for this, but I WILL note that, for my extruder, I had to chamfer the second hole that fed the filament through the PTFE tubing a bunch since the gears didn't perfectly line up with that hole, making it so not only did I have difficulty feeding filament through, but it shaved off the filament as the extruder worked. This extruder is solid in every other aspect but this one, and while I would still certainly recommend it over other dual gear models on Amazon, I would advise having a needle file on hand just in case your hole(s) are misaligned/undersized. You get what you pay for, as they say. UPDATE: 9/23/22: After some fairly light but solid use, I can safely say that this is very likely your best budget dual gear option on Amazon right now. My only gripe that still remains is that it's finicky to actually get the filament through the gears AND to the hotend, but I imagine that's just because of my own weird setup, and I've heard that people have issues feeding filament through their stock/single-extruder setups anyways. If you're like me and you're patient (and desperate) enough to stick with it once you buy it, I still recommend getting a needle file just in case you need to widen the feed hole--after adding extra clearance it works just fine and no longer shaves away the filament.

The Redrex Dual Gear Ender 3 Extruder with Two Washers Metal Drive Feeder Upgrade Kit is a decent upgrade for the Ender 3 printer, but it comes with a few considerations. On the positive side, the dual gear design provides excellent grip and traction on the filament, ensuring a more reliable and consistent feed. It's a noticeable improvement over the stock extruder, especially when using flexible or specialty filaments. The inclusion of two washers is a nice touch. They help to reduce any wobbling or play in the extruder assembly, contributing to a more stable and accurate filament feeding process. The metal drive feeder is sturdy and well-constructed. It feels durable and adds a level of robustness to the printer's extrusion system. However, there are a couple of areas where I found room for improvement. Firstly, the installation process was a bit more involved than I anticipated. It required some disassembly and adjustment, which may be a bit daunting for less experienced users. Clearer and more detailed instructions would have been appreciated. Secondly, while the dual gear design is effective, I did notice that it generates a bit more noise compared to the stock extruder. It's not overly loud, but it's something to be aware of if noise levels are a consideration in your workspace. Additionally, it's worth noting that the kit may not be entirely plug-and-play for all users. Depending on the specific configuration of your Ender 3, you may need to make additional adjustments or tweaks to ensure optimal performance. In summary, the Redrex Dual Gear Ender 3 Extruder Upgrade Kit is a solid enhancement for the Ender 3 printer, particularly for those working with specialty filaments. It provides a noticeable improvement in filament traction and feeding. However, the installation process may require a bit of extra effort, and users should be aware of potential noise levels. Overall, it's a worthwhile upgrade for those looking to fine-tune their Ender 3's extrusion capabilities.

If you have an Ender 3, just buy the one with a motor if you’re unsure if you have the 22mm shaft or not. This has been the best upgrade to my printer hands down. It was a hassle for me to get to this point- first the all-metal extruder, then the dual gear setup, and finally the dual gear with stepper motor. Under extrusion issues are GONE. Stringing has been dramatically reduced and 9 times out of 10 it only does so in the infill. I went from prints constantly failing after an hour or so to confidently running my printer unattended. Best $26 you can spend on an upgrade. Previous review: Despite instructions claiming otherwise, does not fit Ender 3 with the 22mm shaft. The set pin is too high on the gear. The only way to get this to line up is to have the set screw rest on top of the shaft, meaning the gear isn’t attached. This is the second product I’ve purchased from this brand and both have had fitment issues. Quality control is sorely lacking.

This review is for the dual gear extruder upgrade. Does not apply to all metal gear extruder upgrade. First off, I have been 3D printing since the release of the first Ender 3. Since than, I have owned ender 3 pros, v2's, cr10s, cr10v2/v3s, Vorons, rat rigs, you name it, I've seen it or owned it. So I like to think I know a thing or 2 about 3d printers. I have usually had some pretty good luck when it comes to ordering parts on amazon because most distributers aren't half bad. However this time, I wasn't so lucky. I do blame myself for not being more aware of this matter but with newer printers, Creality has shortened the shaft on their stepper motor for the extruder therefore making this dual gear extruder upgrade impossible for NEWER Ender 3 Pros. Luckily, I had a spare 42-40 motor with a longer shaft that I had on hand from an older cr10 v2 which worked. But wait, there is more! Now the first half wasn't so much as the manufactures/distributors fault, but Creality's. However, the manufactures/distributors are not without blame either! As seen in the photo, you can see that the both gears have 0 clearance and are rubbing up against the poorly painted (doesn't even seem anodized) aluminum causing some pretty nasty friction. This extruder doesn't even match the one in the photos and seems poorly manufactured. Had this not been the case, I wouldn't be typing out this disgruntled review. And yeah bruh, I'm pretty salty about it. So, I will be returning it and will be avoiding UniTak3D-US since they are the distributer for this product. No, I will not be accepting a replacement from them since that will take to long and I just don't feel like dealing with all the hassle. Thank goodness for amazon returns.

Hab meinen Ender 3 Pro von dem serie solo Gear Feeder auf Dual Gear aufgerüstet. Würde ich auf jeden Fall weiterempfehlen: Aufbau: ein bisschen knifflig mit der Feder, aber es machte schon beim Aufbau einen sehr soliden Eindruck. Sonst eigentlich ganz einfach - alten Feeder abschrauben, neuen dranschrauben und Filament durchführen und schon ist es startklar. Anwendung: Auch nach längerem Einsatz muss ich sagen, ich bin mehr als zufrieden. Selbst bei feineren Drucken, wo der Feeder sehr präzise arbeiten muss und auch oft das Filament vor und wieder zurückschieben muss, macht der dual Gear Feeder sehr gute Arbeit.

Que lo utilice para una impresora 3D marca Voxelab y quedó muy bien

Great extruder, using two gears instead of a bearing, the alu housing also is a big stepup from the original plastic and now the filament hole is also easier to find and put new filament in.

Nie pasuje do standardowego silnika od creality ender 3 trzeba osobno zamówić silnik inna średnica trzpienia

Works really well with my Ender3 V2, the dual gear delivers filament really well. Only issue I had weren't cause by the product : I forgot to change my e-steps. This resulted in extremely weak prints. Of course, it extruded 6,6cm of filament when I asked for 10... So don't be like me, and immediately calibrate your e-steps after installation!