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

Great replacement gears

A little bigger than stated 5mm inside diameter.

Using this drive gear to grip a brass rod. Nice. Set screws hold tight on extruder shaft. Used a standard allan wrench. Its loose in hex socket, too much force will round the hex.

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.

The angle between the two position screws are closer to 45-60 degrees.

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

These seem like they will hold up better than the brass. They have two set screws and were an exact replacement for what I had.

Super upgrade over the brass ones on the Ender 3

Better than enders part

good good in the hood