Vacuum cleaner

A vacuum cleaner comprising:

• a suction source operable to generate an airflow;
• a first stage cyclonic separator configured to separate debris from the airflow, the airflow rotatable about a first stage separator axis in the first stage separator to separate the debris from the airflow, the first stage cyclonic separator including
• a wall surrounding the first stage separator axis, and
• a rib extending along the first stage separator axis and projecting towards the first stage separator axis from the wall along a rib tip line;
• a second stage cyclonic separator downstream from the first stage cyclonic separator, the second stage cyclonic separator configured to separate debris from the airflow;
• a first stage collector configured to receive debris from the first stage cyclonic separator;
• and
• a second stage collector configured to receive the debris from the second stage cyclonic separator, the second stage collector being within the first stage collector, the second stage collector having a polygonal cross section taken normal to the first stage separator axis that includes a plurality of vertices,
• wherein a vertex line extends between a vertex of the plurality of vertices and the first stage separator axis, and
• wherein the rib tip line and the vertex line are aligned with each other such that the rib is aligned with the vertex.