Face milling tools | CoroMill® 745 CoroMill® 745, insert for milling​​ R = Right hand, L = Left hand Metric (mm) P S K M K20W K20D S30T S40T S30T S40T 4240 4230 4220 1230 1040 2030 2040 3040 1040 2030 2040 4240 4230 4220 1020 3040 4240 1040 2030 2040 Ordering code SSC S BS RE IC [mm] [mm] [mm] [mm] 745R-2109E-M30 ○●○○ ○ ○○○○●○○ 21 9.00 0.3 1.0 21.00 M30 Medium 745R-2109E-M31 ○ ● ○ ○ ○ ○ ○ ○ ● ○ ○ ○ ○ ○ ○ ○ ○ ● ○ ○ ○ ○ ○ ● ○ ○ 21 9.00 1.9 1.0 21.00 M31 ● = First choice ○ = Good choice 147