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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.
- Present grinding processes can now be machined reducing cost and time.
SELECTION STANDARD
Heat Treated Steel
| Work Material |  |
Cutting Mode |
Recommended Grade | Recommended Cutting Condition | |||
|---|---|---|---|---|---|---|---|
| Cutting Speed (SFM) | Feed (inch/rev) | Depth of Cut (inch) | |||||
| Structural Steel High Alloy Steel |
35–65 HRC |  |
High speed finish cutting | MBC010 | 820 (490－1310) | －.008 | －.008 |
| Continuous cutting for general purpose | MBC020 | 655 (260－820) | －.012 | －.020 | |||
| Interrupted cutting for general purpose | 490 (195－655) | －.008 | －.012 | ||||
 |
Continuous cutting | MB8025 | 590 (260－820) | －.012 | －.020 | ||
| Light interrupted cutting | 390 (195－490) | －.008 | －.012 | ||||
| High speed finish cutting | MB810 | 655 (490－985) | －.006 | －.006 | |||
| Continuous to medium interrupted cutting | MB825 | 390 (230－490) | －.012 | －.020 | |||
| Interrupted cutting | MB835 | 330 (165－390) | －.012 | －.020 | |||
Cast Iron
| Work Material | Workpiece Structure |
Cutting Speed (SFM) | Feed (inch/rev) |
Depth of Cut (inch) | Coolant | |
|---|---|---|---|---|---|---|
|
||||||
| Gray Cast Iron | － |  |
－0.20 | －.039 MBS140 －.197 |
Dry,Wet | |
| Alloy Cast Iron | Pearlitic | －0.16 | －.020 | Dry,Wet | ||
| Ductile Cast Iron | 60-40-18 | Ferritic |  |
－0.16 | －.020 | Dry,Wet |
| 100-70-03 | Ferritic + Pearlitic Pearlitic | |||||
Sintered Alloy
| Work Material | Recommended Grade | Recommended Cutting Condition | ||
|---|---|---|---|---|
| Cutting Speed (SFM) | Feed (inch/rev) | Depth of Cut (inch) | ||
| General Sintered Alloy | MB4020 | 820 (260－985) | －.008 | －.012 |
| High Density Sintered Alloy | MB4020 | 490 (260－820) | －.008 | －.012 |
| Sintered Alloy | MB4020, MB835 | 330 (260－490) | －.008 | －.012 |
Valve Seat
| Amount of Hard Particles |  |
|||
|---|---|---|---|---|
| Hardness of Workpiece (HV) | 150 | 250 | 300 | 350 |
| Plunge Cut |  |
|||
| Traverse Cut |  |
|||
Roll
| Work Material | Grade | Recommended Cutting Condition | ||
|---|---|---|---|---|
| Cutting Speed (SFM) | Feed (inch/rev) | Depth of Cut (inch) | ||
| Cast Steel Adamite Cast Steel |
MB825, MB8025 | 260 (100－425) | .012 (.004－.020) | .008－.118 |
| Ductile Cast Iron Granular Cast Iron Chilled Cast Iron |
MB710 | 260 (100－425) | .012 (.004－.020) | .008－.118 |
| High Chromium Steel High Alloy Steel |
MB825, MB8025 | 260 (100－425) | .012 (.004－.020) | .008－.118 |
| High Speed Steel | MB730 | 165 (65－230) | .010 (.004－.020) | .004－.118 |
| Cemented Carbide | MB730, MBS140 | 65 (30－100) | －.020 | －.008 |
Heat Resistant Alloy
| Work Material | Grade | Recommended Cutting Condition | ||
|---|---|---|---|---|
| Cutting Speed (SFM) | Feed (inch/rev) | Depth of Cut (inch) | ||
| Ni Base Alloy | MB730 | 390 (330－490) | －.008 | －.020 |
| Co Base Alloy | MB730 | 230 (165－330) | －.008 | －.020 |
