[Part Name] Bearing, sleeve [Description] A cylindrical support and also allows vertical movement of the blade. [Manufacturing] metal casting was used and machining for the hole [Reason for Using Materials] steel is a good metal for structural integrity [Forces Applied] none [Functional/Cosmetic] This part is functional because it supports the shaft assembly [Quantity] 1 [Complexity] 3 [Reason for Shape] 
cylindrical shape so that the shaft assembly fits snugly into the bearing