It provides smooth motion with a low cost linear motion on ISO aluminium 2020 beam for Kossel mini.
Using a F695ZZ bearing to replace a too expensive V-rollers and it sliding on a size 2020 beam that easy find than 1515.
The belt slot can lock GT2 and adjust tension(common design). The three main hole is made to fit M5 screws to give strongly support when rolling.
BOM for each:
M5 x 20 screw x3pcs
M5 spring washer (best is 1.5 thicknesses) x 3pcs
M5 nuts x 6pcs
F695zz bearing x 3pcs
M4 hex socket x 1pcs
M4 nuts x1pcs
M3 x 20 screw x3pcs
M3 X18 screw x 2pcs
M3 nuts x 5pcs
M3 washer x 2pcs