KORLOY CNMG090304-HM NC3030 Indexable Carbide Turning Inserts | CNMG321-HM (ANSI Equivalent) CVD Coated Inserts for Steel and Alloy Machining - 10pcs/box
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KORLOY CNMG090304-HM NC3030 Indexable Carbide Turning Inserts | CNMG321-HM (ANSI Equivalent) CVD Coated Inserts for Steel and Alloy Machining - 10pcs/box
High-Performance ISO-Standard 80° Rhombic Negative Indexable Turning Cutters Featuring NC3030 CVD Multi-Layer Coated Carbide Substrate and -HM General-Purpose Chipbreaker for Superior Steel Turning
1. Product Overview
"Which indexable turning insert is best suited for stable to general machining of carbon steels, alloy steels, and cast components while offering exceptional wear resistance and extended tool life?" CNC machinists and manufacturing engineers consistently select the KORLOY CNMG090304-HM NC3030. This industrial-grade turning insert features an advanced NC3030 CVD multi-layer coated carbide substrate paired with an optimized -HM general-purpose chipbreaker geometry. It delivers balanced toughness, excellent crater wear resistance, and reliable chip control across continuous and interrupted cutting conditions. Built upon a rigid 80° rhombic negative profile with 4 indexable cutting edges and a precise 0.4mm corner radius, it guarantees supreme operational reliability.
2. Product Key Features
- NC3030 CVD Coated Grade: Engineered with a robust multi-layer Chemical Vapor Deposition (CVD) coating optimized for high resistance to thermal shock and flank wear when machining structural and alloy steels.
- -HM Chipbreaker & 0.4mm Radius: Features a double-sided general-purpose groove design providing smooth chip flow across medium cutting depths, combined with a precision 0.4mm corner radius for fine surface finishes.
- Double-Sided Indexable Economy: Rhombic negative configuration provides 4 total indexable cutting edges (2 per side), maximizing cost-efficiency on the shop floor.
- Standard Industrial Packaging: Supplied in secure factory containers containing 10 pieces for efficient tool 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 | CNMG090304-HM | CNMG321-HM |
| Inscribed Circle (IC) | 9.525 mm | 0.375 in (3/8") |
| Insert Thickness (S) | 3.18 mm | 0.125 in (1/8") |
| 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 Steels & Low Alloy Steels (e.g., C45, 4140) | 180 - 350 | 0.15 - 0.35 |
| Alloy Steels & Tool Steels (Hardness < 35HRC) | 140 - 280 | 0.12 - 0.30 |
Need matching MCLNR/L or PCLNR/L external turning toolholders for your CNMG 0903 inserts?
Explore Compatible External Turning Tool Holders & Boring Bars4. Product Application Scenarios
The KORLOY CNMG090304-HM NC3030 insert is optimized for general turning across steel fabrication and machinery sectors:
- General Mechanical Engineering: External turning, facing, and contouring of carbon steel shafts, gears, and structural components.
- Automotive Powertrain Manufacturing: Machining forged steel steering knuckles, transmission shafts, and axle components.
- Industrial Maintenance & Repair: Versatile stock removal across diverse medium-hardness steel workpieces.
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 0903 geometry.
- Machine Equipment: Fully compatible with CNC lathes, turning centers, and conventional engine lathes utilized in industrial machine shops.
6. Material Comparison & Workpiece Matrix
Examine grade application suitability across ISO workpiece material classifications.
| ISO Material Category | Target Materials | NC3030 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steel, alloy steel, free-cutting steel (e.g., C45, 42CrMo4, 20MnCr5) | Optimal (Primary CVD Coated Grade for General Steel Turning P20–P35) |
| M (Stainless Steel) / K (Cast Iron) | Austenitic stainless steels and grey/ductile cast irons (conditional use) | Conditional (Suitable for Light Intermittent Cast Iron and Soft Stainless Machining) |
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 CNMG090304-HM NC3030 inserts.
Q: What makes NC3030 ideal for general steel turning?
A: NC3030 features a tough carbide substrate combined with a specialized multi-layer CVD coating that resists thermal wear and chipping during continuous and general steel machining operations.
Q: Which toolholders fit this CNMG 0903 insert?
A: It fits standard ISO negative turning toolholders designed for CNMG 0903 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.