CreativityUpgraded K1 Extruder Full Metal 1.75mm Filament No Motor Extrusion Kit POM Dual Gear Drive for K1/K1C/K1Max 3D Printer

I would say, it's great so far!! Original wore out. Decided to give this a try. Will update!! Update*** still the best thing I bought for it!! Works like a dream. Keeps up with the print!!

I’m going to give this Extruder a 1 star as of right now this extruder was delivered to me the other day but I didn’t have time to install it till now. Opened the box and everything looked fine. Till I tried to install the tensioner screw the holes did not line up. at first, I thought this was for a different printer, but when I checked the company website, this is the only style they make for the K-1 so it’s a factory defect. How did this thing make it pass quality control? I didn’t ask for a refund. I just want the right extruder and what’s even worse why I’m giving them one star is I gotta wait till Monday to receive it.

After installation was having issues with underextrusion. Took it back out to inspect and noticed filiment was getting shaved off. Ended up boring out the exit hole to 2.3mm and filed off sharp edges. Also lubricated the tensioner arm hinge because it was stiff and replaced the tensioner spring with stiffer one. Has been working well since. Not a bad product by any means. Just needs some basic machining to get it to perform as it should which can easily be done with a cordless drill and a bit. Took about 10mins to do. Not sure how the metal housing will affect long prints as it does get warm over time. Only used it with petg so far and was able to handle a 9hr print.

Read on for tips and instructions on the install and use:Install wasn't the easiest, but not hard either. Getting it to fit so I could get the mounting screws to thread in properly was the only real pinch point. There needs to be instructions provided or a link to instructions the least. I found that the extruder fits fine without any modification, if you ensure the extruder motor wires are out of the way, and not pinched or in the way. The clip that holds the wires in place is a common area it gets pinched.Had extrusion issues at first, but I believe I have that sorted. Just needed to figure out the tension needed and work out some kinks.First, the tension/lever arm will need some lubrication to allow it to move more easily. The tension arm can hang up a bit on the tension screw, so a drop of oil in the area it rubs on the screw may help, or file down that small 1/4in section of the thread so it can move easier.You want to use some light duty thread lock on the tension screw. (Purple type, not the green. The green type works/is used differently, if you use it like normal thread lock it is as strong as red thread lock, that screw is never coming out again... Use purple type thread lock) Make sure you coat both the inside threads of the hole and the bottom section of the screw to ensure good coverage. Thread it in until you see the screw just start to extend out of the hole. This is a good length for full use of the available spring pressure, and the thread lock will hold the screw in place even when you use the thumb wheel to adjust tension.The top part of the tension screw, add a small amount of the light duty thread lock. This will help the adjustment knob stay in place and not move due to the vibration. Work the adjustment knob around so it will not stick too much. The goal is to have the thread lock provide a little resistance to movement, not secure the knob in place.As far as tension goes, for standard filament types, you want the knob screwed down to basically completely compress the spring. You can use less tension for soft filament like TPU, and may need to test out different tension amounts for best function with those types of filament. The spring could stand to be stronger for more tension, but it is workable.The inner gears are the same as the original extruder, or appear to be so, but you may need to tune the extruder step count in the printer config file, or adjust your flow rate in the slicer. You will need to enable root privilege in the settings to make changes to the configuration file. If you don't know how to tune klipper configs, use the slicer flow rate to adjust.When loading new filament, you want to adjust the tension knob for minimum tension on the filament, then insert the filament into the extruder, and use the exposed gear to feed the filament past the extruder gears and into the hotend. Then adjust the tension to the desired amount for the filament type. When unloading, after you retract the filament from the hotend, you wlll want to adjust the knob to minimum tension, and then pull the filament out of the extruder the rest of the way.I ended up replacing the spring with one from an old Ender 3 extruder. This also required a slightly longer screw for the spring to fit. This is a much better way to go, as I do not need to compress the spring completely. Loading filament is easier with this change as well.Learning the particulars of how this extruder works, and just having a bit more knowledge of how a 3D printer works fundamentally is going to be helpful. This is not an upgrade for the set it and forget it crowd.I will update this review if i have any issues.

Works fine for a while, but the extruder gears chipped an broke on 2 that I've owned. Would be solid if the gears didn't chip and break.

very well built and solid machining, it does weigh a bit more than the stock plastic one so take that into account when purchasing. i have not installed yet, its a backup when my plastic one gives out which is usually about a month or so depending on run time

Absolute junk just shreds the filament, printer was working great before I put this on, now it can barely print a benchy

I got this to replace the stock extruder in my K1 Max. It had started jamming the filament just below the extruder gears. This addressed that problem after I got it installed & a bit of tuning.The problem I had was with the installation. there were basically 2 issues there. First off there were no instructions, and the extruder didn't fit w/o modifying the tool head.I was not too difficult to figure out, and I did manage to find a video on installing a similar extruder on YT, and that helped with the few parts I was questioning. But to further complicate things, there were a few screws left over, so I was not exuding confidence once I had it in.The second issue is the new extruder did not fit properly. The right side does not sit all the way in the tool head, so the screws did not line up. At first I thought the PTFE tube below the extruder was to tall for the new extruder, but when I pulled that out to test fit w/o it, the extruder still sat to high on the right. I finally figured out that the new extruder was deeper front to back, and the strain relief for the extruder motor was in the way. I wound up clipping that off, and it slipped right in to place.Once installed, there were 3 things that are worth mentioning when using it.First is the obvious, you need to tune the pressure used by the extruder. Not a big deal, but that's what screwed up my first test print.Second, there is no feed release like in the new extruder like the OEM one. When loading the filament you need to feed it thru using the extruder wheel.Finally, I managed to drop the Bowden tube clip on the top into the extruder twice. After fishing it out the 2nd time, I opted to just leave it off.So time will tell if this is worth it. But as of now, I'm pleased with the result.