MK8 Stainless Steel Extrusion Gear
The MK8 is an evolution of the MK7 Drive Gear. The smaller diameter gives 35% more power, and allows for more compact extruder designs.
If you need a replacement gear, or you’re designing your own custom project, this is the part! Very sharp teeth to dig into the plastic filament for the best grip ever.
Direct drive of the filament will give better prints, but you can also use these in a matching bowden-extruder.

Specifications:
Material = Stainless Steel
Outer Diameter = 9mm
Height = 11mm
Effective diameter = 7.1mm
Shaft/Bore = 5mm