Turning indexable inserts CW ±0.05 3˚3˚ S Edge preparation type No. of edges A66N PT600M A65 Ceramic lineup Positive inserts Grooving inserts Cutting edge preparation Gray cast iron (with scale) B Symbol Speci cation Example Gray cast iron (without scale) N O K S Chamferedand honed S01525 0.15 mm × 25°Chamfered and honedNodular cast iron (with scale)Nodular cast iron (without scale) T Chamfered T01525 0.15 mm × 25°Chamfered Heat-resistant alloy S Hard materials O N H Dimension (mm) Tolerance Ceramic Insert Description PVD - ApplicableCWSREINSLCWmin.CWmax.toolholder GH 4020-054020-05 S01020T01020 2 4.0 7.5 0.5 N20- 0.05+ 0.05NN GHINSLRE 5020-055020-05 S01020T01020 2 5.0 7.5 0.5 N20- 0.05+ 0.05NN G50, G51, G75 5˚ 120˚ GH 6020-05 T01020 2 6.0 7.5 0.5 20 - 0.05 + 0.05 N N GH 7020-05 T01020 2 7.0 7.5 0.5 20 - 0.05 + 0.05 N G50, G75 N : Standard item R : Right hand only L : Left hand only U : Check availability B118