Light-interrupt, Continuous Finishing
Turning – Hardened material, Continuous cutting
At hardness levels of HRC 55 or below, CBN wear rises rapidly, making ceramic tools the preferred choice for high‑hardness machining.
Ceramic has superior wear resistance vs. CBN machining under HRC55
Effect of Wiper type insert
[ Cutting conditions ]
CNGA120412
Vc = 100m/min F = 0.1mm/rev ap = 0.5mm
330 SFM .004 IPR .020 DOC
Using a ZC7 insert with AG-chipbreaker improves surface finish and reduces machine down-time due to chip tangling. This results in increased productivity.
[ Cutting conditions ]
SCM415 – carburized HRC50
vc = 150m/min f = 0.2mm/rev ap = 0.2mm
500 SFM .008 IPR .008 DOC
Corner Radius | DOC (mm) (inch) | Feed (mm/rev) (IPR) |
|---|---|---|
| R0.4 R .016 | 0.15 .006 | 0.05 ～ 0.08 .002 ～ .003 |
| R0.8 R .031 | 0.3 .012 | 0.08 ～ 0.10 .003 ～ .004 |
| R1.2 R .047 | 0.4 .016 | 0.10 ～ 0.13 .004 ～ .005 |
| R1.6 R .063 | 0.5 .020 | 0.13 ～ 0.16 .005 ～ .006 |
| Round insert | 2.0 .080 | 0.16 ～ 0.25 .006 ～ .010 |
| ISO | Material | Coolant | Grade | vc (m/min) (SFM) | ap (mm) (inch) | f (mm/rev) (IPR) |
|---|---|---|---|---|---|---|
 | Hard Turning Finishing Continuous cutting | DRY/WET | ZC7 | 40 – 200 130 – 660 | 0.1 – 0.7 .004 – .030 | 0.07 – 0.2 .003 – .008 |
| Mill Roll Rough-Finish Turning | DRY | HC7 | 90 – 180 300 – 600 | 0.5 – 2.0 .020 – .080 | 0.1 – 0.3 .004 – .012 | |
| Mill Roll Rough-Finish Turning（CPM） | 120 – 150 400 – 500 | 0.6 – 2.0 .024 – .080 | 0.1 – 0.3 .004 – .012 |
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