Cutting insert and milling cutter

A milling cutter comprising:

• a cutter body having at least one insert pocket, the at least one insert pocket comprising adjacent side and rear walls generally transverse to a base, the side wall being provided with two spaced apart generally flat and non-coplanar side support surfaces, a forward side support surface and a rear side support surface, and
• a cutting insert seated in the at least one insert pocket, the cutting insert comprising:
• a top surface, a bottom surface, and a peripheral side surface extending therebetween, the peripheral side surface comprising a pair of opposing major side surfaces and a pair of opposing minor side surfaces;
• two opposing major cutting edges formed at the intersection of the opposing major side surfaces with the top surface;
• wherein;
• each one of the pair of opposing major side surfaces comprises two spaced apart generally flat and non-coplanar abutment surfaces;
• the two spaced apart generally flat and non-coplanar side support surfaces of the at least one insert pocket abut said two spaced apart generally flat and non-coplanar abutment surfaces belonging to one of said pair of opposing major side surfaces;
• a first of the two spaced apart abutment surfaces makes a first angle α with a normal N to a plane P passing through the bottom surface of the cutting insert and a second of the two spaced apart abutment surfaces makes a second angle β with the normal N;
• and
• the forward side support surface makes a third angle α′ with a normal N′ to a plane P′ passing through the base and the rear side support surface makes a fourth angle β′ with the normal N′.