BIQU Extruder Pulley 36Teeth Bore 5mm Stainless Steel Drive Gear for 1.75mm & 3mm 3D Printer Filament (Pack of 5pcs)

I got some of these to go with a metal extruder for my Ender 3. Theyre probably strong enough to drag a refrigerator down a hallway. Get some. Throw your brass in the trash.

very easy to install on an ender 3v2 and I didnt even have to adjust my e-steps

Was starting to have trouble with the extruder skipping. Replaced the stock brass gear with one of these and problem solved. Cant really speak to the durability as Ive just started a print with the new one, but the improvement in extrusion was immediate. For the money you really cant go wrong if youre not quite ready to upgrade the extruder.

I recently printed Delein with moderate success but when I switched back to TPU for a customer I noticed I was getting terrible underextrusion. Come to find out the Deleon has almost polished smooth the teeth on the brass hub. I have since replaced the brass with these and have gone through a whole spool of delrin, glow in the dark, and wood and teeth are still sharp. Highly recommend. Also the larger grub screws allow for a much tighter lock on the motor shaft.

Good nuff

Great replacement gears

They work great the higher teeth count eliminates grinding.

These gears grip the filament very well. They dont slip and generally provide nice results. In 3D printing, there are always little things that add up and these are a good inexpensive item to ensure that the whole system is running smoothly over long periods of time. Most people will have good results with this on a single gear extruder. The only weakness I have seen is that with certain prints that have a lot of retractions, there will be flattening of the filament. This may lead to under extrusion or even complete blocking of the Bowden tube. So if a certain print has fine detail such as fine embossed text, the retractions will add up and begin crushing PLA filament before the filament reaches far into the Bowden tube. Hence, this will lean on a slicer setting for Max Retractions.

These are nice fit my ender 3. I do recommend adding some loctite to the set scew or it will come loose everytime

Worked good on my cr-10s