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- Grade Introduction
- Polycrystaline Cutting Tools
- For Heat Treated Steel
 FOR
HEAT TREATED STEEL MB810 MB820 MB825 MB835 |
| We manufacture 4 special grades for heat treated steel.(See chart) MB810 and MB820 are suitable for continuous cutting. MB825 and MB835 are suitable for interrupted cutting. |
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| FEATURES OF EACH GRADE |
| Grade | Application | Features | Recommended Cutting Conditions | |||
| Cutting Speed (m/min) |
Feed (mm/rev) |
Depth of Cut (mm) |
Coolant | |||
| MB810 | High Speed Continuous Cutting |
Most suitable grades for high speed continuous cutting. Improved wear resistance with larger CBN particles. |
250 (200－400) |
－0.15 | －0.15 | Dry cutting is recommended (Especially for interrupted cutting) |
| MB820 | General Continuous Cutting |
Grade designed with superior thermal conductivity and crater wear resistance. | 120 (70－200) |
－0.3 | －0.5 | |
| MB825 | Light Interrupted Cutting |
Improved cutting edge srength with micro grain CBN particles. | 120 (70－200) |
－0.3 | －0.5 | |
| MB835 | Heavy Interrupted Cutting |
Improved grade by using micro grain CBN.Excellent fracture resistance is suitable for heavy interrupted cutting. | 100 (50－200) |
－0.3 | －0.5 | |
| CUTTING PERFORMANCE |
| Continuous Cutting | Interrupted Cutting |
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| Application Examples |
| Grade | MB810 | MB810 | MB820 |
| Cutting Mode | External Turning (Continuous) |
End Face Cutting (Continuous) |
Boring (Continuous) |
| Workpiece | Carburized Tempered Steel 60HRC(DIN 15CrMo5)  |
Carburized Tempered Steel 62HRC(DIN 20Cr4)  |
Carburized Tempered Steel 60HRC(DIN 20Cr4)  |
| Cutting Speed (m/min) |
200 | 270 | 150 |
| Feed (mm/rev) |
0.1 | 0.06 | 0.04 |
| Depth of Cut (mm) |
0.13 | 0.15 | 0.02 |
| Coolant | Dry | Dry | Dry |
| Conventional Tool |
Competitor's CBN | Competitor's CBN | (Grinding) |
| Insert | NP-TNMA160408F | NP-VNMA160404F | CCMW120408 |
| Results |  |
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| Grade | MB820 | MB825 | MB825 |
| Cutting Mode | Boring (Continuous) |
External Turning (Continuous) |
External Turning (Continuous) |
| Workpiece | Alloy Steel 60HRC (DIN 42CrMo4)  |
Carburized Tempered Steel 60HRC(DIN 20Cr4)  |
Alloy Steel 58-60HRC (DIN 42CrMo4)  |
| Cutting Speed (m/min) |
150 | 90 | 110 |
| Feed (mm/rev) |
0.1 | 0.08 | 0.15 |
| Depth of Cut (mm) |
0.1 | 0.05 | 0.1 |
| Coolant | Water Soluble Oil | Dry | Dry |
| Conventional Tool |
Competitor's CBN | Competitor's CBN | Competitor's CBN |
| Insert | NP-TPGX110308F | DNMA150408 | NP-TNMA160408T |
| Results |  |
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| Grade | MB835 | MB835 |
| Cutting Mode | End Face Cutting (Interrupted) |
End Face Cutting (Interrupted) |
| Workpiece | Alloy Steel 62-64HRC (DIN 42CrMo4) Gear  |
Carburized Tempered Steel 60HRC(DIN 20Cr4) Transmission Gear  |
| Cutting Speed (m/min) |
120 | 100 |
| Feed (mm/rev) |
0.05 | 0.05 |
| Depth of Cut (mm) |
0.15 | 0.1 |
| Coolant | Water Soluble Oil | Water Soluble Oil |
| Conventional Tool |
Competitor's CBN | Competitor's CBN |
| Insert | NP-TNMA160408T | Special(Round Insert) |
| Results |  |
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