Korloy CNMG120404-HM NC3030 Steel Roughing Turning Insert (10pcs)
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The Original Korloy CNMG120404-HM NC3030 (ANSI Standard: CNMG 431) is the ultimate workhorse for medium to heavy steel turning. Engineered for reliability in unpredictable conditions, the NC3030 grade features a thick, heat-resistant CVD coating and a highly reinforced substrate. Whether you are facing interrupted cuts, heavy scale, or unstable machine setups, this insert provides the impact resistance needed to keep your production running without unexpected downtime.
Proven Performance: The CNMG1204 size offers maximum structural rigidity, making it the primary choice for larger CNC lathes and heavy-duty industrial components.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG120404-HM |
| ANSI Code | CNMG 431 |
| Grade | NC3030 (Heavy CVD Steel Specialist) |
| Chipbreaker | HM (Medium-Roughing) |
Core Performance Benefits:
- Maximum Fracture Toughness: Specialized NC3030 substrate absorbs high-frequency vibrations and mechanical shocks during interrupted cuts.
- Double-Sided Value: Features 4 usable cutting edges, offering the best cost-per-part ratio for high-volume manufacturing.
- HM Chipbreaker: Designed for wide-ranging chip control, effectively breaking chips in both medium finishing and heavy roughing depths of cut.
- Thermal Barrier Coating: The thick CVD Alumina layer allows for machining at high temperatures without compromising edge geometry.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel | 160 - 320 m/min | 0.15 - 0.45 mm/rev | 1.0 - 5.0 mm |
| Alloy Steel / Die Steel | 130 - 260 m/min | 0.12 - 0.35 mm/rev | 0.8 - 4.0 mm |
Compatible Tool Holders:
Maximize your machine's potential by pairing these inserts with high-performance D-Type or M-Type holders:
- External Turning: MCLNR/MCBNR/MCKNR/MCFNR/MCMNN/MCGNR
- Large Boring Bars: S32T-MCLNR12 / S40T-MCLNR12
Steel Grade Pro-Tip: NC3030 vs. NC3120
Selecting the best tool for your production line:
Optimized for toughness. Use this for interrupted cuts, rough outer surfaces, and unstable clamping setups.
Optimized for wear resistance. Best for high-speed, continuous finishing on stable machines.
Machinist's Tip: For CNMG 431 inserts, always ensure the seat (shim) of your tool holder is clean and flat, as heavy roughing with NC3030 creates significant downward pressure.
Packaging: 10 pieces per box.