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

Description says 5 extruder gears when I received 4. Probably wont even use 4 but its not the point. Would like to receive what I actually paid for.

Seem solid and work great in my mk8 extruder.

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.

I was having clogs and extruder gear clicking sounds...turns out the teeth on my old gear had started to wear down. After checking my retraction settings and every other thing, settled on trying these out. Was NOT disappointed! Awesome to have some spares as well.

replaced the brass gears that keep wearing down..these should come stock with the printers

These are *much* better than the soft brass drive gears many 3D printers come with. After a couple of clogged nozzle issues my Ender3 was not feeding correctly due to the brass gear wearing down a bit, replaced it with these and have not had the slightest issue. Great upgrade.

A little bigger than stated 5mm inside diameter.

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

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.

Worked great.