Grooving Internal grooving EZG type Summary deep grooving Type KGIA Min. bore diameter ø32~ø66 Edge width (mm) 3.0~5.0 Grooving depth (mm) 10~15 Molded chipbreaker Type KIGH Min. bore diameter ø45~ø65 Ground chipbreaker Edge width (mm) 4.0~8.0 Grooving depth (mm) 12 G Molded chipbreaker Summary internal grooving & turning ø20~ Type KGDI Min. bore diameter ø18~ø40 Edge width (mm) 2.0~5.0 Grooving depth (mm) 4.5~11.0 GMI chipbreaker Molded chipbreaker Full-R Type KIGM-8 Min. bore diameter ø65 Edge width (mm) 8.0 Grooving depth (mm) 20 Molded chipbreaker Ground chipbreaker Type KIGMU-8 Min. bore diameter ø65 Edge width (mm) 8.0 Molded chipbreaker Grooving depth (mm) 2.2 Full-R G54