Double-sided, trigon cutting insert with rounded minor cutting edge and cutting tool therefor

A cutting tool, comprising:

• a tool body including a plurality of insert-receiving pockets, each insert-receiving pocket including a planar bottom support surface, a first planar side support surface, a second planar side support surface, and a third planar side support surface;
• and
• a trigon cutting insert mounted in a respective insert-receiving pocket, each trigon cutting insert including a first surface;
• a second surface opposite the first surface;
• three peripheral side surfaces extending entirely between the first and second surfaces, each peripheral side surface including a first planar side surface portion extending entirely between the first and second surfaces, and a second planar side surface portion extending entirely between the first and second surfaces;
• three major cutting edges formed at an intersection between the first planar side surface portions and the first surface;
• three minor cutting edges formed at an intersection between the second planar side surface portions and the first surface,
• wherein one of the second planar side surface portions on one of the side peripheral surfaces of the cutting insert contacts the first planar side support surface of the insert-receiving pocket, and
• wherein one of the first planar side surface portions on an adjacent side peripheral surface of the cutting insert contacts the second planar side support surface of the insert-receiving pocket, and
• wherein one of the second planar side surface portions on a different one of the peripheral side surfaces of the cutting insert contacts the third planar side support surface of the insert-receiving pocket when the cutting insert is mounted in the insert-receiving pocket.