Reversible conveyer assembly for milling apparatus

A abrasive type milling machine, comprising:

• a bearing housing mounted on a structure of the milling machine, the bearing housing is associated with a rotary ring with a wear ring for connecting the rotary ring to the structure;
• a main shaft rotatably supported in the bearing housing by means of an upper and a lower bearings, the main shaft is coupled with a machine pulley that is connected to a motor pulley by means of a conveying belt;
• and
• a reversible conveyor assembly comprising a screw conveyor having one or more projection means formed on both an upper and a lower portions of the screw conveyor;
• and a conveyor flange having a guiding means and a groove that are engraved on an upper portion of the conveyor flange, wherein the screw conveyor is assembled to the conveyor flange in such a way that the guiding means of the conveyor flange is arranged to contact the inner surface of the circular projection of the screw conveyor for placing at least one of the projection means of the screw conveyor with the groove of the conveyor flange, which ensures axial alignment of both the screw conveyor and the conveyor flange,
• wherein the main shaft vertically extends to the conveyor flange through the screw conveyor, such that the conveyor flange is coupled to the main shaft by means of locking unit, which ensures co-linearity of axial center of the conveyor assembly in relation to the main shaft.