Creality 3D Printer Parts 5PCS Brass Extruder Wheel 40 Teeth Drive Gear for CR-10.CR-10S,S4,S5,Ender 3,Ender 3 Pro,Ender 3 V2

I purchased these for spare parts for my printer. I havent used them yet but they look identical to the factory parts.

Soes exactly what it is supposed to do and is a direct replacement for the Ender 3 printer.

Good quality Extruder Wheel 40 Teeth Drive Gear

The stock stepper has a press fit gear which is challenging to remove once worn. Cut it off, dont bother with a puller. These replace the press fit gear on the arbor, but use two set screws with a vaguely 1.5mm hex hole to tighten them down. Tightening them down is problematic. Sometimes they hold fine, sometimes the set screws do not provide enough friction and the gear slips. If that happens then good luck diagnosing intermittent extrusion issues. One of mine finally slipped enough to stop extruding part way through a print. If you understand that problem and think it is solvable then this will be good value. I hit my arbor with a small diamond file to give the screws some purchase and that works very well. Up to you.

What an improvement. Pics show new one installed next to the old one. Best part is I now have spares in case I ever need to replace this one. Not hard to replace, just check out YouTube videos on replacement.

Really good drive gear for most printers out there. I like that it has two adjustable screws to keep it in place. It lets me adjust the gear slightly to an unworn spot on the gear as it wears naturally over time.