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.

Much better than stock... This was a nice upgrade to my stock Monoprice i3 clone.

Work as designed to replace the OEM item that was replaced.

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.

Good gear, ID is 5.04mm, OD is 10.95mm. Seems to be really good quality and will last a long time extruding pla and petg.

Old brass extruder gear wore out quickly. Bought these and it has 0 wear to it. Buy if you need new extruder gears.

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.

These wheels work and fit perfectly but they wear out quickly. I do a lot printing and have to replace them every few weeks. If you dont print 24-7 this might not be an issue for you. I dont mind having to replace them because of how cheap they are. I like to clean and lubricate my printer regularly so I just replace the wheel when I am doing my preventative maintenance.

Great replacement gears

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.