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work material | hardness | cutting speed V(m/min) | cutting depth d(mm) | feed rate f(mm/rev) | |
Hardened steel | >55HRC | 80~120 | 0.3~1.5 | 0.08~0.2 | CBN300/500 CBN900 |
<56HRC | 80~150 | 0.5~2.0 | 0.1~0.25 | CBN300/500 | |
Gary cast iron | 180~230HB | 500~1500 | 0.1~2.0 | 0.15~0.4 | CBN750,CBN900 |
Ductile cast iron | 200~700 | 0.3~2.0 | 0.1~0.4 | CBN450 | |
Rolls(chilled cast iron) | >55HRC | 80~120 | 0.3~2.0 | 0.1~0.3 | CBN900 |
Powdered metal | <35HRC | 100~300 | 0.3~2.0 | 0.1~0.3 | CBN500,CBN900 |
>35HRC | 50~200 | 0.3~2.0 | 0.1~0.3 |


Work Material &Working Mode | chamfer Angle α | Chamfer Weight a(mm) | Blunt Roundness R(mm) |
Steel | 25° | 0.1~0.2 | 0.01~0.02 |
Cast Iron | 20° | 0.1~0.5 | <0.01 |
Interruption Mode | 30° | 0.2 | <0.01 |







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