Summary of Internal Grooving  Deep Grooving (G61,G63) Type KGIA Min. Bore Dia. φ32~φ66 Edge Width (mm) 3.0~5.0 Grooving Depth (mm) 10~15 Molded Ref. to Page G63 Chipbreaker Type KIGH Min. Bore Dia. φ45~φ65 Edge Width (mm) 4.0~8.0 Grooving Depth (mm) 12 Ref. to Page G61 Ground Chipbreaker G Molded Chipbreaker Grooving  Internal Grooving & Turning φ20~ (G58, G60, G62) External Type KGDI GMI Internal Min. Bore Dia. φ18~φ40 Chipbreaker Face Edge Width (mm) 2.0~5.0 Grooving Depth (mm) 4.5~11.0 Ref. to Page G58 Molded Chipbreaker Full-R Type KIGM-V Min. Bore Dia. φ20~φ40 Edge Width (mm) 3.0~5.0 Grooving Depth (mm) 5.5~11.0 Ref. to Page G60 Type KIGM-8 Min. Bore Dia. φ65 Edge Width (mm) 8.0 Grooving Depth (mm) 20 Ref. to Page G62 Molded Chipbreaker Ground Chipbreaker Type KIGMU-8 Min. Bore Dia. φ65 Edge Width (mm) 8.0 Grooving Depth (mm) 2.2 Molded Ref. to Page G62 Chipbreaker Full-R G42