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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 + Honed | Chamfer + Honed | Chamfer + Honed | Sharp Edge | Chamfer + Honed | R honed | Sharp Edge | ||||
| Corner-R (rε) = 0.05 | Sharp corner | Corner-R (rε) = 0.2-0.3 Corner-R (rε) = 0.2-0.3 | Corner-R (rε) = 0.2 | Corner-R (rε) = 0.05 | Sharp Corner | ||||||
| Edge prep. | |||||||||||
| 1 | CR9025/PR915 | PR930/KW10 | CR9025/PR915 | PR930/KW10 | PR1115 | CR9025 | PR930/KW10 | ||||
| Optimized coolant hole position | · Sharp edge specification can reduce cutting force by 40% less than that of chamfer edge. | ||||||||||
| Series | Advantage | ||||||||||
| Specific chipbreaker for cut-off operations requiring sharp cutting performance. | |||||||||||
| GMM-MT | |||||||||||
| 2 | Discharge 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
(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