KGD typeKGD type GDM/GDMS/GDG type

KGD-JCT Edge preparation

Cut-off toolholders for automatic lathe great for high pressure coolant

Series MT-chipbreaker TK-chipbreaker TMR-chipbreaker Without chipbreaker (NB)

(for automatic lathe)Chamfer + HonedChamfer + HonedChamfer + HonedSharp EdgeChamfer + HonedR honedSharp Edge
Corner-R (rε) = 0.05Sharp cornerCorner-R (rε) = 0.2-0.3 Corner-R (rε) = 0.2-0.3Corner-R (rε) = 0.2Corner-R (rε) = 0.05Sharp Corner
Edge prep.
1CR9025/PR915PR930/KW10CR9025/PR915PR930/KW10PR1115CR9025PR930/KW10
Optimized coolant hole position· Sharp edge specification can reduce cutting force by 40% less than that of chamfer edge.
SeriesAdvantage
Specific chipbreaker for cut-off operations requiring sharp cutting performance.
GMM-MT
2Discharge coolant towards the Minimizes the boss.

Cutting edge is flat with non-chipbreaker. flank face of the insert GMM-NB It works well for brass, etc. Directing coolant towards the cutting edge lengthens Stable design with chipbreaker for cut-off. Large corner-R.

GMM-TK 2-edge for economical performance. tool life. Same chipbreaker geometry as GMM-TK. GMN-TK 1-edge. Wide application range.

HH GMN (Std.) Mainly for deep grooving, but available for groove widening and turning due to projection near side cutting edge.

Coolant discharging (No indication) 1-edge and wide application range. Available for cut-off applications. KGD-JCT Competitor A

Sufficient cooling Coolant does not flow directly towards the cutting edge towards the cutting edge

Wear resistance comparison Cutting edge condition

(Internal evaluation) (after machining 20min) 0.20 KGD-JCT 0.15 Competitor A (Internal coolant type) KGD-JCT Competitor A 0.10 High density and high speeds coolant provides effective cooling of the cutting edge 0.05 Superior cooling action improves tool life 0.00

0 20 40 60 80

Cutting time (min) Cutting conditions: Vc = 80 m/min, f = 0.06 mm/rev (~2 mm : f=0.02 mm/rev), KGDR1625H-2JCT, GDM2020N-015PF PR1535 (CW: 2.0 mm) Workpiece material : SUS304 (ø25) Internal coolant (1.5MPa) Cut-off