Mendel X-axis drive pulley with a round hole and 3 screws to hold it

Fits a mendel X-axis motor, and can be screwed into place with 3 M3 screws.

I drilled the holes up to 2.9mm and put 3 M3 screws in there.

That really made the pulley stick, without destroying the motor shaft.

Turned out my problem was with my power supply, not the pulley begin loose.