Patent ID: 8678718

Claim:
An indexable cutting insert ( 20 ) comprising two opposing end surfaces ( 22 ) with a peripheral side surface ( 24 ) and a central axis (C) extending therebetween, the cutting insert ( 20 ) having four cutting portions ( 26 a , 26 b , 26 c , 26 d ) and exactly four distinct, spaced apart abutment zones ( 28 a , 28 b , 28 c , 28 d ) arranged along the peripheral side surface ( 24 ), each of the four abutment zones ( 28 a , 28 b , 28 c , 28 d ) configured to make clamping contact in at least one index position of the cutting insert ( 20 ), wherein the cutting insert ( 20 ) is divided into four imaginary quadrants (Q 1 , Q 2 , Q 3 , Q 4 ) about the central axis (C), and wherein the four abutment zones ( 28 a , 28 b , 28 c , 28 d ) are entirely located within two (Q 1 , Q 3 ) of the four imaginary quadrants (Q 1 , Q 2 , Q 3 , Q 4 ).