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CBN
- Suitable for high speed finishing of heat treated steel,sintered ferrous alloy and cast iron.
- Low affinity to iron, thus good surface finishes are possible.
- Grinding can be replaced by machining.
SELECTION STANDARD
Heat Treated Steel
| Work Material | Type | Cutting Mode | Recommended Grade | Recommended Cutting Conditions | |||
|---|---|---|---|---|---|---|---|
| Cutting Speed (m/min) | Feed (mm/rev) | Depth of Cut (mm) | |||||
| Structural Steel Esp. Carburized Steel High Alloy Steel |
35─65 |
Coated | High speed finishing cutting | MBC010 | 250 (150─400) | ─0.2 | ─0.2 |
| Continuous cutting for general purpose | MBC020 | 200 (80─250) | ─0.3 | ─0.5 | |||
| Interrupted cutting for general purpose | 150 (60─200) | ─0.2 | ─0.3 | ||||
| Non─ coated |
Continuous cutting for general purpose | MB8025 | 180 (80─250) | ─0.3 | ─0.5 | ||
| Interrupted cutting for general purpose | 120 (60─150) | ─0.2 | ─0.3 | ||||
| Continuous to light interrupted cutting | 120 (70─150) | ─0.3 | ─0.5 | ||||
| Heavy interrupted cutting | MB835 | 100 (50─120) | ─0.3 | ─0.5 | |||
Cast Iron
| Work Material | Workpiece Structure | Cutting Speed (m/min) | Feed (mm/rev) |
Depth of Cut (mm) |
Coolant | |
|---|---|---|---|---|---|---|
 |
||||||
| Gray Cast Iron | GG25 | Ferritic + Pearlitic |  |
─0.5 | ─1.0 MBS140 ─5.0 |
Dry,Wet |
| GG30 | Pearlitic | |||||
| Alloy Cast Iron | Pearlitic | ─0.4 | ─0.5 | Dry,Wet | ||
| Ductile Cast Iron | GGG40 | Ferritic |  |
─0.4 | ─0.5 | Dry,Wet |
| GGG70 | Ferritic + Pearlitic Pearlitic | |||||
Sintered Alloy
| Work Material | Recommended Grade | Recommended Cutting Condition | ||
|---|---|---|---|---|
| Cutting Speed (m/min) | Feed (mm/rev) | Depth of Cut (mm) | ||
| General Sintered Alloy | MB4020 | 250 (80─300) | ─0.2 | ─0.3 |
| High Density Sintered Alloy | MB4020 | 150 (80─250) | ─0.2 | ─0.3 |
| Sintered Alloy | MB4020, MB835 | 100 (80─150) | ─0.2 | ─0.3 |
Valve Seat
| Amount of Hard Particles |  |
|||
|---|---|---|---|---|
| Hardness of Workpiece (HV) |
150 | 250 | 300 | 350 |
| Plunge Cut |  |
|||
| Traverse Cut |  |
|||
Roll
| Work Material | Grade | Recommended Cutting Conditions | ||
|---|---|---|---|---|
| Cutting Speed (m/min) | Feed (mm/rev) | Depth of Cut (mm) | ||
| Cast Steel Adamite Cast Steel |
MB8025 | 80 (30─130) | 0.3 (0.1─0.5) | 0.2─3.0 |
| Ductile Cast Iron Granular Cast Iron Chilled Cast Iron |
MB710 | 80 (30─130) | 0.3 (0.1─0.5) | 0.2─3.0 |
| High Chromium Steel High Alloy Steel |
MB8025 | 80 (30─130) | 0.3 (0.1─0.5) | 0.2─3.0 |
| High Speed Steel | MB730 | 50 (20─70) | 0.25 (0.1─0.4) | 0.1─3.0 |
| Cemented Carbide | MB730, MBS140 | 20 (10─30) | ─0.2 | ─0.2 |
Heat Resistant Alloy
| Work Material | Grade | Recommended Cutting Conditions | ||
|---|---|---|---|---|
| Cutting Speed (m/min) | Feed (mm/rev) | Depth of Cut (mm) | ||
| Ni Base Heat Resistant Alloy (e.g. Inconel) | MB730 | 120 (100─150) | ─0.2 | ─0.5 |
| Co Base Heat Resistant Alloy (e.g. Stellite) | MB730 | 70 (50─100) | ─0.2 | ─0.5 |
