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

Fit perfect and worked great after e-step calibration on cr-10s.

The original that came with the printer is too cheap and bad. My printer stopped extruding everytime because of them. With these my problem went away. I replace them in an Ender 3 v2

I bought these last year and replaced all my printers with these. And they are far better then one comes stock. The stock wore out so quick. Once I put these on i haven had any problems with filament not getting pulled or filament slipping. there are currently being used for my CR-10s and Hatchbox alpha and not one issue. These are really high quality and at this price point its hard not to get them. I highly recommend getting these and having some lying around in case anything happens. Its better to have spares then to be down while new ones get shipped. Again these are much better then stock. Highly recommend!

Brass drive gear had worn out and was slipping. Filament would not feed. The steel gear made my extruder work again. I hope steel last longer than brass.

Bought these for my 3d printer and they work better than the stock ones! Holds the tubing well and tight! Happy with them.

Working well so far. Ran a kilo of carbon fiber through so far without issue. Do wish they had two grub screws instead of just one.

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.

Slightly smaller than standard for my CR-10. Needed to play around with the feed rates to get the right flow. Dramatically less feed slippage though, and Im assuming the steel will be more durable than the stock brass parts.

I was hesitant at first because from the pictures they look like they only have a single grub screw. I took a chance because of the price. Was relieved when I found that they do have 2 grub screws. Easy to install on my Ender 3 v2 with upgraded aluminum extruder. I did have to readjust my esteps slightly, but thats 100% expected. Havent noticed any skips and seems to wear less than the brass one it came with.

The original extruder pulley that came with my 3D printer wore out very quickly. Replaced with this & works great. No more filament slipping.