Bigtreetech Upgrade Dual Gear Extruder, Double Gear MK8 Extruder 3D Printer Dual Driver Stock Feeder All Metal 1.75mm Filament Extruder Kit for CR-10S Pro/CR-10/ Ender 3 V2/Ender 3/Ender 3 Pro Series

I have 4 BIQU B1s and installed these on 2 of them so far. I plan to do the other 2. These are a really solid upgrade. For the BIQU B1, you need to be aware of a couple things:- The esteps will need to be changed. Mine defaulted to 98 on the old factory extruder. (That resulted in 105mm instead of 100mm extruded by the way). The correct estep value for these is 136 for a BIQU B1. You can set this via gcode using "M92 E136" then issue a save with "M500". You can also use the "save to eeprom" in the BIQU B1 menu to save. If you're not comfortable entering console commands you can use the tuning menu in the BIQU B1 and do the calibration then ignore the measurements and just increase the esteps to 136. After that, make sure you use the "save to eeprom" option.- Some slicers add esteps to the gcode. The ideamaker app that comes with the BIQU B1 does this. So you'll have to edit the printer config and go to advanced and change it from 98 to 136. You can open the gcode files with notepad or such and search for M92 and make sure it's E136 not E98 in that file.- You can alternatively do none of the above and only change the value in the gcode from M92 E98 to M92 E136 but this requires editing each gcode file after saving it.- Finally, the printer's filament sensor will be slightly too low when installing the new extruder. Ideally you need a couple more 1/4" spacers and a couple longer M3 screws. What I did is unscrew the two screws on the filament sensor and move it to the left so that the right screw went into the left hole on the holding bracket. Then I just used the right screw to hold the sensor in place. This moved it to the left almost an inch and the filament can bend a little and it works with no other spacers. A better long term solution will be to get some longer M3 screws and print a couple extra spacers. But it's been working as I set it without any additional parts.

With the latest Ender 3 v2 the motor has changed. The shaft is no longer keyed and the factory feed roller is pressed onto the shaft. As a result the new set screw is too high to catch the shaft. Also you need to get the old pressed roller off before you can even see this issue. The result is that this will NOT work on the newer Ender 3. If you look down at your extruder and the motor shaft does not stick up above the roller gear then this will not work.I always wondered how you connect the finger wheel filament feeders you find on Thingiverse for the Ender 3. Now I know with their latest model none of those will work either. Hmm...I guess I can kind of blame Creality for this but the vendor of this extruder needs to be current as well. If they made the lower part of the gear longer and put the set screw down there then it would work but you still have to get the pressed roller off the motor.Now that sounds all negative and if you have that model I guess it is - however, their customer service is absolutely great. They reached out to me immediately to clarify and resolve the issue. Although in the end it has been turned over to their engineers for a permanent solution, they gave me options and refunded super quick. I will definitely buy from them again.

Ordered this product and it worked adequate for about 2 months of regular printing. Then I would get constant clogs. Finally the removable nozzle is completely clogged and stuck in the hotend and cannot be removed with numerous troubleshooting methods. Tip wear was evident. Just a poor quality part that I wish I didn’t purchase. Their customer service was terrible. Would not refund! Kept dragging out the refund process with nonsense questions days apart. Terrible seller and terrible product. Do not buy!!

Ordered this for my Ender 3 pro as the teeth were worn and no longer feeding the filament consistently. I have installed similar hardware on other printers, so this one wasn't a big deal, but for someone new to this, the lack of decent instructions may be a bit frustrating. The only other con for me is the inability to add an extruder knob due to the design. Not a deal breaker, but maybe future versions could allow for this.Now for the good:This thing is well built and works like a dream! Anyone that has dealt with the old style single gear extruders know how aggravating feeding new filament can be! Sometimes it seems almost impossible to get it aligned and feeding properly. No such issue with this one. Feeds right through, and no slipping or jumping. I'm also not seeing the filament dust accumulate around the drive gears like in others. Would definitely purchase again!

This worked very well as a replacement for my Ender 3 Neo 2 MAX. I did need to print a spacer for the run out sensor and adjust the e-steps which they very helpfully supply the setting and the spacer is easy to find online. I haven't had any clogging or jamming issue and it's pretty quiet. The motor doesn't seem to get any warmer than the OEM and wiring was easy.

[Dual-Gear Extruder] I have some issues with the fitment. The filament port on the base of the part I got is out of alignment, like the cutting tool wandered. This will surely increase the friction and must be fixed. I do appreciate the small washers that were included to help keep the drive cogs from wearing down the housing. The shiny red finish looks great but did make the PTFE couplers a bit tight. I suggest working them in (screw it in a little, back it up, screw it in a little more, back it up, etc.) Mounts just fine on Anycubic Mega X (Bowden extruder.)