KORLOY CNMG120404-HM NC3120 Indexable Carbide Turning Inserts | CNMG431-HM NC3120 (ANSI Equivalent) Advanced CVD Coated Carbide Inserts for High-Speed Steel Turning - 10pcs/box
✓ In Stock & Fast Dispatch: Ships within 24–48 Hours from China
✓ Global Shipping: Express 3–10 Days | Standard 5–15 Days
✓ Guaranteed Quality: 100% Compatibility | Direct Factory Outlet
✓ Technical Support: Need grade selection help? Contact Engineer
KORLOY CNMG120404-HM NC3120 Indexable Carbide Turning Inserts | CNMG431-HM NC3120 (ANSI Equivalent) Advanced CVD Coated Carbide Inserts for High-Speed Steel Turning - 10pcs/box
High-Performance ISO-Standard 80° Rhombic Negative Indexable Turning Cutters Featuring NC3120 Advanced CVD Coated Carbide Substrate and -HM Universal Chipbreaker for Superior General Steel Machining and Long Tool Life
1. Product Overview
"Which indexable turning insert provides the optimal balance of wear resistance and edge toughness for general steel turning and high-speed finishing operations?" CNC machinists and manufacturing engineers consistently rely on the KORLOY CNMG120404-HM NC3120. This industrial-grade turning insert features KORLOY's specialized NC3120 advanced CVD multi-layer coated carbide substrate engineered to withstand high thermal loads and abrasive wear during continuous to light interrupted cutting, combined with a robust -HM universal chipbreaker geometry. It delivers exceptional chip control and extended tool life, ensuring dependable performance in automated production environments. Built on a rigid 80° rhombic negative profile with 4 indexable cutting edges and a precise 0.4mm corner radius, it guarantees superior surface finishes in demanding shop-floor applications.
2. Product Key Features
- NC3120 Advanced CVD Grade: Features a high-performance chemical vapor deposition (CVD) multi-layer coating optimized for high-speed steel turning, providing outstanding wear resistance and thermal stability.
- -HM Universal Chipbreaker & 0.4mm Radius: Combines a versatile groove design for reliable chip breaking across wide feed ranges with a precision 0.4mm corner radius for tight dimensional control.
- Double-Sided Indexable Economy: Rhombic negative configuration provides 4 total indexable cutting edges (2 per side), maximizing cost efficiency per edge.
- Standard Industrial Packaging: Supplied in secure factory containers containing 10 pieces for seamless tool inventory tracking.
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 NC3120 | CNMG431-HM NC3120 |
| 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 (Continuous to Light Interrupted) | 180 - 320 | 0.15 - 0.35 |
| Tool Steel & Mold Steel (Medium Finishing) | 150 - 260 | 0.12 - 0.28 |
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 NC3120 insert is engineered for high-efficiency turning across diverse industrial sectors:
- Automotive Component Manufacturing: Turning transmission shafts, axle components, and forged steel drive train parts at high production rates.
- General Mechanical Engineering: Machining standard carbon steel and alloy steel machine components, pump shafts, and industrial rollers.
- Mold & Die Industry: Roughing and semi-finishing mold base plates and carbon steel structural blocks.
5. Compatibility
Designed for seamless integration with standard ISO negative toolholding configurations:
- Toolholders: Compatible with standard MCLNR/L, PCLNR/L, and CCLNR/L lever-lock and screw-clamp external turning toolholders built for CNMG 1204 geometry.
- Machine Equipment: Fully compatible with high-speed CNC turning centers, automatic lathes, and conventional engine lathes.
6. Material Comparison & Workpiece Matrix
Examine grade application suitability across ISO workpiece material classifications.
| ISO Material Category | Target Materials | NC3120 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steel, alloy steel, and low-alloy structural steel under continuous to light interrupted machining (e.g., C45, 4140, 20CrMo) | Optimal (Primary General-Purpose CVD Grade for High-Speed Steel Turning P15–P35) |
| M (Stainless Steel) | Austenitic and martensitic stainless steels under stable conditions | Conditionally Suitable (Secondary application for light stainless steel 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 NC3120 inserts.
Q: What workpiece materials are ideal for the NC3120 grade?
A: NC3120 is an advanced CVD coated grade engineered specifically for general steel and alloy steel turning at high cutting speeds (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.