KORLOY CNMG120404-HM NC3020 Indexable Carbide Turning Inserts | CNMG431-HM NC3020 (ANSI Equivalent) CVD Coated Carbide Inserts for Steel Machining - 10pcs/box
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KORLOY CNMG120404-HM NC3020 Indexable Carbide Turning Inserts | CNMG431-HM NC3020 (ANSI Equivalent) CVD Coated Carbide Inserts for Steel Machining - 10pcs/box
High-Performance ISO-Standard 80° Rhombic Negative Indexable Turning Cutters Featuring NC3020 Advanced CVD Coated Carbide Substrate and -HM Universal Chipbreaker for Superior General Steel and Alloy Turning
1. Product Overview
"Which indexable turning insert provides the highest wear resistance and stability for general steel turning, carbon steel, and alloy steel machining across continuous and interrupted cuts?" CNC machinists and manufacturing engineers consistently rely on the KORLOY CNMG120404-HM NC3020. This industrial-grade turning insert features KORLOY's advanced NC3020 CVD multi-layer coated carbide substrate optimized for high wear resistance, thermal stability, and edge strength, combined with a versatile -HM general-purpose chipbreaker geometry. It delivers exceptional performance across diverse cutting conditions, ensuring stable chip control and prolonged tool life during medium to rough turning operations. Built on a rigid 80° rhombic negative profile with 4 indexable cutting edges and a precise 0.4mm corner radius, it guarantees superior reliability and productivity in demanding industrial environments.
2. Product Key Features
- NC3020 CVD Coated Grade: Features an advanced chemical vapor deposition (CVD) multi-layer coating engineered to provide high flank wear resistance and thermal endurance in general steel machining.
- -HM Universal Chipbreaker & 0.4mm Radius: Combines a broad range chipbreaker design for effective chip control across varying feed rates with a precision 0.4mm corner radius for accurate finishing and profiling.
- Double-Sided Indexable Economy: Rhombic negative configuration provides 4 total indexable cutting edges (2 per side), maximizing tool utilization and lowering cost-per-part metrics.
- Standard Industrial Packaging: Supplied in secure factory containers containing 10 pieces for efficient toolcrib inventory management.
3. Technical Specifications & Model Breakdown
Review the comprehensive technical parameters, metric-to-imperial cross-references, and ISO nomenclature breakdown below.
Metric vs. Imperial Designation Comparison
| Specification Parameter | Metric Standard (ISO) | Imperial Equivalent (ANSI) |
|---|---|---|
| Primary Insert Model | CNMG120404-HM NC3020 | CNMG431-HM NC3020 |
| Inscribed Circle (IC) | 12.7 mm | 0.500 in (1/2") |
| Insert Thickness (S) | 4.76 mm | 0.1875 in (3/16") |
| Corner Radius (r) | 0.4 mm | 0.0157 in (~1/64") |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Carbon Steel & Alloy Steel (e.g., C45, 42CrMo) | 180 - 320 | 0.15 - 0.35 |
| Cast Steel & Structural Steel | 150 - 280 | 0.12 - 0.30 |
Need matching MCLNR/L or PCLNR/L external turning toolholders for your CNMG 1204 inserts?
Explore Compatible External Turning Tool Holders & Boring Bars4. Product Application Scenarios
The KORLOY CNMG120404-HM NC3020 insert is engineered for general steel turning across major industrial sectors:
- Automotive Powertrain & Drivetrain: Turning transmission shafts, forged steel gears, axle components, and steering knuckles.
- General Machine Building: Machining heavy-duty industrial rollers, hydraulic cylinders, and carbon steel machine framing components.
- Energy & Power Generation: Turning turbine shafts, pump housings, and robust steel connectors.
5. Compatibility
Engineered for universal integration with standard ISO negative toolholding systems:
- Toolholders: Fully compatible with standard MCLNR/L, PCLNR/L, and CCLNR/L lever-lock and pin-and-clamp external turning toolholders designed for CNMG 1204 geometry.
- Machine Equipment: Fully compatible with CNC lathes, horizontal turning centers, and heavy-duty CNC lathes.
6. Material Comparison & Workpiece Matrix
Examine grade application suitability across ISO workpiece material classifications.
| ISO Material Category | Target Materials | NC3020 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steel, alloy steel, and cast steel (e.g., C20, 4140, 1045) | Optimal (Primary CVD Coated Grade for General Steel Turning P15–P35) |
| K (Cast Iron) | Gray cast iron and ductile nodular iron (e.g., GG25, GGG40) | Moderate Suitability (Acceptable for light continuous cast iron turning) |
7. Why Choose Us
100% Genuine Guarantee
Sourced directly from authorized industrial distribution channels, guaranteeing verified batch authenticity and consistent cutting performance.
Fast Global Logistics
Maintained warehouse stock and streamlined international shipping networks ensure rapid dispatch to eliminate production downtime.
Technical Expertise
Backed by professional CNC application engineers available to provide customized cutting data recommendations and troubleshooting support.
8. Frequently Asked Questions (FAQ)
Q: How many inserts are included in each box?
A: Each standard factory box contains exactly 10 pieces of CNMG120404-HM NC3020 inserts.
Q: What workpiece materials are ideal for the NC3020 grade?
A: NC3020 is a dedicated CVD coated grade engineered specifically for carbon steel, alloy steel, and structural steel turning (ISO P15–P35 range).
Q: Which toolholders fit this CNMG 1204 insert?
A: It fits standard ISO negative turning toolholders designed for CNMG 1204 geometry, such as MCLNR or PCLNR external toolholder bars.
Need Help With KORLOY Inserts?
Looking for a KORLOY equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This KORLOY insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.