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

I ordered these to swap out the stock grear from my Ender 3 and they seem to be a good value upgrade. They are all well machined and have two grub screws. These are a bit more aggressive than the stock gear but thats what I was looking for.

Always had problems with my ender 3 with under extrusion with certain filament brands at normal temps. Work around was to increase temp which caused stringing or blobs till I found these steel gears for the extruder. Made a difference reminds me of the original ones you find on a wanhao i3. Must buy for Ender 3.

Set screw takes a metric 1.5 hex wrench which is very small, and the average person wont have. The teeth are the same diameter as the original gear on my MK10 extruder. I did not have to adjust extrusion multiplier when switching over. Teeth dulled enough within 8 hours to start causing print failures. (Filament was highly abrasive carbon fiber reinforced type). Easy to slide the gear in or out on the drive shaft for fresh teeth, but cannot recommend this for use with abrasive filaments). Should work wonderfully for everything else.

Perfect upgrade for extruder gears, used in both direct drive and Bowden configurations and works perfectly and cheaper than most, definitely a win.

I like these a lot better than the brass ones that the Ender 3 comes with. They seem a lot more durable and grip pretty well. I dont think Ill have to replace one of these for a long time.

Good nuff

They seem to last better, but the teeth arent very sharp so they dont grip very well. At least, compared to the brass ones that came on my printer.

These have worked well over the past prints! The teeth come to a more defined point so they grab the filament better and wont slip. Wont wear out like the cheap brass ones.

I have used these on every 3D printer I own or have owned. I dont even bother with stock gears anymore, as soon as I open a new printer I find the extruder and replace the brass gear with one of these. Absolutely no complaints.

Collar is ferric stainless, actual spurs are austentic stainless. For those of you who are trying to confirm these are indeed steel via magnetism. These are indeed stainless steel. Just the spurs are austentic stainless (non magnetic) with a higher chromium content than that of the collar. Otherwise the spurs grip filament nicely.