Hobb-Goblin - 5mm ID Drive Gear

A wicked little filament drive gear made from stainless steel with really sharp little teeth cut into it.
 
These are carefully manufactured on a synchronised CNC processs which gives a sharp, consistent, and clean cut tooth profile that has incredibly good grip.
 
We've tested these with 1.75mm filaments, from the soft and delicate flexibles to hard materials. All with great results.
 
These are a great match for our NEMA17 Stepper motors with 5mm shafts to create low cost and simple extruders for 1.75mm filament. These gears are similar in effective radius and usage to a Mk8 Drive Gear.
 
Attaches to a 5mm motor shaft with an included M3 Set Screw.
 
internal diameter 5 -0+0.1
external diameter 8 +/-0.1
effective diameter 7.8