MK7 Direct Drive Hobbed Gear - 1.75mm
These precision-made hobbed gears are designed to be attached directly to a stepper motor with a 5mm shaft. They grip tightly using an M4 grub screw.
These gears are designed to work with 1.75mm filament, and do so perfectly. They will physically work with 3mm filament, but you will need a very beefy stepper motor.
An M4 allen key to suit the grub screw is included with each order