Roasting system having self-aligning agitator and door bearing assembly

A bean roasting system having a roasting chamber assembly, comprising:

• a roasting drum having an opening and having an inside surface with a back end and a front end, the inside surface defining a central axis of the roasting drum;
• an agitator having a plurality of blades mounted to an axial shaft that defines a central axis of the agitator that is substantially aligned with the central axis of the roasting drum,
• the plurality of blades include a first subset of blades and a second subset of blades,
• the agitator includes a plurality of mounts that includes a first mount, a second mount and a third mount,
• the first subset of blades mounted to the axial shaft of the agitator by the first mount and the second mount, the second subset of blades mounted to the axial shaft of the agitator by the second mount and the third mount;
• and
• a door mounted rotationally relative to the opening of the roasting drum, the door including a glass plate to provide visual access to contents inside the roasting drum when the door is closed over the opening.