The bearings can support radial forces
The bearings can support axial fores in one direction
The bearings can support axial forces in both directions
The bearings are greased
The bearings are sealed on both sides
The permissible operating temperature differs from the standard values
(um:0,-10) CN,(um:5,20)
Alvania S2, -25 ~ +120 Steel
NBR, Black  
ball bearing