Cutting insert having cylindrically shaped side surface portions

A double-sided reversible and indexable cutting insert comprising:

• identical opposing first and second end faces;
• a peripheral side surface extending between said first and second end faces, the peripheral side surface comprising Y major side surfaces and Y minor side surfaces, Y being an integer number, each minor side surface interconnecting two adjacent major side surfaces;
• a clamping through-bore extending between, and opening out to, the first and second end faces;
• a median plane (M) located between, and spaced apart from, the first and second end faces;
• and
• a through-bore axis (T) extending perpendicularly through the median plane, with the cutting insert having Y-fold rotational symmetry about the through-bore axis;
• wherein:
• each minor side surface is a section of a single cylindrical surface having a radius (R), the radius (R) being greater than a minor side surface distance (D) between said each minor side surface and the through-bore axis.