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

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.

Review.

Actually Im testing in my CR-10, in this short time I dont have any problem

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

Definetley doesn’t grind my gears the least bit. Works as they should.

Worked great.

Better than enders part

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 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.

Good nuff