Grooving External grooving GBA type External grooving of precision parts For automatic lathe · Coolant-through holders Type KGD Type KGD-JCT Type KGM Edge width (mm) 2.0 ~ 4.0 Edge width (mm) 2.0 ~ 4.0 Edge width (mm) 1.5 ~ 4.0 Max. grooving depth (mm) 10 ~ 25.5 Max. grooving depth (mm) 12 ~ 16 Max. grooving depth (mm) 10 ~ 16 Molded chipbreaker Ground chipbreaker G Type KGBF-F Edge width (mm) 0.25 ~ 3.0 Max. grooving depth (mm) 0.6 ~ 3.0 · Coolant-through holders Type KGBFS KGBF-JCT S-KGBF Edge width (mm) 0.25 ~ 3.0 0.25 ~ 3.0 0.25 ~ 3.0 Max. grooving depth (mm) 0.6 ~ 3.0 0.6 ~ 3.0 0.6 ~ 3.0 Ground chipbreaker GL chipbreaker For aluminum wheel external grooving (External / Facing / Copying) Type KTGF-F KTGF S-KTGF Edge width (mm) 0.33 ~ 2.5 0.33 ~ 2.5 Max. grooving depth (mm) 0.8 ~ 2.5 0.8 ~ 2.5 Type KGMW Edge width (mm) 6.0 ~ 8.0 Max. grooving depth (mm) 25 Ground chipbreaker 1-edgePCD G7