Motor Belt Drive / 40mm 60mm 80mm 100mm V-Belt Pulley, Single Groove, A- Type(A Type 40 X 15mm)
Applicable: A-type V-belt
What is the diameter of the motor shaft?
Buy a pulley with the same size hole,
It's neither big nor small,
It is just right (such as a single hole diameter of 12mm under a shaft diameter of 12mm is just right).