Korloy CNMG090304-HM NC3030 Steel Turning Insert (10pcs)
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The Original Korloy CNMG090304-HM NC3030 (ANSI Standard: CNMG 32.1) is a high-performance CVD-coated carbide insert designed for medium-to-heavy turning of steel. The NC3030 grade is world-renowned for its exceptional balance between wear resistance and fracture toughness. Featuring a thick alumina coating, it provides an excellent thermal barrier, making it the primary choice for machining carbon steels and alloy steels even under unstable conditions or interrupted cuts.
Workshop Essential: Facing tool chipping on rough steel surfaces? The NC3030 grade's reinforced substrate is designed to absorb impact where other finishing grades fail.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG090304-HM |
| ANSI Code | CNMG 32.1 |
| Grade | NC3030 (CVD Steel General Purpose) |
| Chipbreaker | HM (Semi-Roughing / Medium Cut) |
Core Performance Benefits:
- Enhanced Edge Toughness: Specialized CVD coating combined with a high-strength substrate prevents sudden breakage during interrupted machining.
- Superior Thermal Resistance: The thick Al2O3 (Alumina) layer protects the insert from the high temperatures generated during heavy metal removal.
- HM Geometry: The HM chipbreaker is optimized for medium cutting depths, ensuring excellent chip curling and evacuation, which prevents workpiece damage.
- Double-Sided Value: As a negative insert, the CNMG090304 offers 4 usable cutting edges, maximizing your cost-per-edge.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel (1018) | 150 - 300 m/min | 0.10 - 0.35 mm/rev | 0.5 - 3.5 mm |
| Alloy Steel (4140/SCM440) | 120 - 250 m/min | 0.08 - 0.30 mm/rev | 0.5 - 3.0 mm |
Compatible Tool Holders:
For high-productivity steel turning, pair these inserts with standard D-Type or M-Type holders:
- External Turning: PCLNR/L 1616H09 / PCLNR/L 2020K09 / DCLNR/L 2525M09
- Boring Bars (Internal): S20R-PCLNR09 / S25S-PCLNR09
Steel Grade Selection: NC3030 vs. NC3120
Optimizing your tool life in steel:
Primary choice for general purpose steel turning. Best for unstable machines, interrupted cuts, and rougher surfaces.
Best for continuous high-speed finishing where surface brightness and high wear resistance are the main goals.
Machinist's Tip: When machining steel with mill scale or "crust," the NC3030 provides the edge toughness needed to penetrate the surface without micro-chipping.
Packaging: 10 pieces per box.