Sync Wheel Pulley make the timing belt move and the X, Y, Z axis will move up and down, left and right, toward and backward.
Please beware as there are different tooth for Idler Pulley, the tooth number will affect the speed, syncing, accurate of printing. And you will need to redo the calibration for your 3D printer after you put different tooth and different size Idler Pulley.
Dual Slot Sync Wheel Idler Pulley mainly use for synchronize two rod Z axis, or any other special use.
20 Tooth idler pulley
H-type synchronous pulley wheel
Tooth width : 9mm for both side
Tooth: 20 (T)
Belt Width: 5 - 9 (mm) per Slot
Height : 27.5mm
Unit diameter : 15.5mm
Center hole diameter : 8mm