Great for high pressure coolant, toolholder for shallow grooving KGBA-JCT KGBA-JCT can direct coolant closer to the cutting edge from the top of the insert Excellent chip control and longer tool life 1 Excellent chip control Ground chipbreaker Chip control comparison (In-house evaluation) Internal coolant provides excellent chip control High-pressure coolant is more effective Alloy steel - 20Cr4 7.0 MPa Internal coolant 2.0 MPa 0.5 MPa (Normal Pressure) External coolant 0.5 MPa (Normal Pressure) f (mm/rev) 0.05 0.07 0.10 Stainless steel - X5CrNi1810 7.0 MPa Internal coolant 2.0 MPa 0.5 MPa (Normal pressure) External coolant 0.5 MPa (Normal pressure) f (mm/rev) 0.05 0.07 0.10 Cutting conditions: Vc = 150 m/min (Alloy steel) / 100 m/min (Stainless steel), f = 0.05~0.1 mm/rev, Groove depth = 2 mm, wet KGBAR2525K22-15JCT, GBA43R200-020 (PR1215) Coolant hole Coolant is discharged to the cutting edge. Prevents coolant stream spreading which slows the coolant flow Coolant direction Sufficient coolant between the chipbreaker and the chips. Stable chip curls and sufficient cooling of the insert 2 Superior cooling action improves tool life Internal coolant provides better corner wear resistance Corner wear amount (mm) Wear resistance comparison (In-house evaluation) 0.20 Internal coolant (2 MPa) Internal coolant (Normal pressure : ~0.5 MPa) 0.15 External coolant (Normal pressure : ~0.5 MPa) 0.10 0.05 0.00 0 20 40 60 80 Cutting time (min) Cutting conditions: Vc = 150 m/min, f = 0.07 mm/rev, groove depth = 2 mm, wet KGBAR2525K22-15JCT, GBA43R200-020 (PR1215) Workpiece: 34CrMo4 3
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