KORLOY SNMG190616-GR NC3120 Indexable Carbide Turning Inserts | SNMG643-GR (ANSI Equivalent) CVD Coated Inserts for Heavy-Duty Steel Machining - 10pcs/box
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KORLOY SNMG190616-GR NC3120 Indexable Carbide Turning Inserts | SNMG643-GR (ANSI Equivalent) CVD Coated Inserts for Heavy-Duty Steel and Alloy Machining - 10pcs/box
High-Performance ISO-Standard 90° Square Negative Indexable Turning Cutters Featuring NC3120 CVD Coating and GR Chipbreaker for Advanced Heavy Roughing and Interrupted Cuts
1. Product Overview
"Which indexable turning insert provides maximum edge toughness and exceptional resistance to thermal shock during heavy roughing and interrupted cutting of alloy steels?" CNC programmers and heavy industry machinists consistently rely on the KORLOY SNMG190616-GR NC3120. This industrial-grade turning insert integrates an advanced NC3120 CVD-coated carbide grade with a specially engineered -GR heavy roughing chipbreaker geometry, ensuring superior chip control, high fracture resistance, and maximized tool longevity under aggressive machining conditions. Built on a robust 90° square negative outline with 8 indexable cutting edges and a heavy-duty 1.6mm corner radius, it guarantees exceptional performance and structural reliability in demanding steel turning operations.
2. Product Key Features
- NC3120 CVD Coated Grade: Designed with a tough, impact-resistant carbide substrate and a specialized multi-layer CVD coating tailored for heavy-duty roughing and interrupted cuts in steels.
- -GR Chipbreaker & 1.6mm Radius: Features an extra-sturdy groove geometry optimized for high feed rates and deep depths of cut, paired with a robust 1.6mm corner radius to distribute cutting loads effectively.
- Double-Sided Indexable Economy: Square negative format provides 8 total cutting edges (4 per side), maximizing cost-efficiency per insert in mass production environments.
- Standard Industrial Packaging: Delivered in protective factory containers containing 10 pieces for straightforward tool management and inventory tracking.
3. Technical Specifications & Model Breakdown
Examine the comprehensive technical specifications, 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 | SNMG190616-GR | SNMG643-GR |
| Inscribed Circle (IC) | 19.05 mm | 0.750 in (3/4") |
| Insert Thickness (S) | 6.35 mm | 0.250 in (1/4") |
| Corner Radius (r) | 1.6 mm | 0.063 in (~1/16") |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Alloy Steel & Carbon Steel (e.g., 4340, 1045) | 150 - 280 | 0.35 - 0.70 |
| Heavy Cast Iron & Structural Castings | 130 - 240 | 0.40 - 0.75 |
Need matching MSSNR or PSBNR external turning toolholders for your SNMG 1906 heavy roughing inserts?
Explore Compatible External Turning Tool Holders & Boring Bars4. Product Application Scenarios
The KORLOY SNMG190616-GR NC3120 insert is tailored for rugged industrial machining environments:
- Heavy Engineering: Rough turning of large steel forgings, turbine shafts, and thick-walled steel pipes.
- Oil & Gas Sector: Machining drill collars, heavy valves, and oilfield structural components under high-impact conditions.
- Shipbuilding & Metallurgy: Aggressive metal removal on large steel rollers, marine propulsion shafts, and structural castings.
5. Compatibility
Engineered to fit standard ISO negative toolholding configurations:
- Toolholders: Fully compatible with heavy-duty MSSNR/L, PSBNR/L, and CSBNR/L pin-and-clamp external turning tool holders designed for SNMG 1906 format.
- Machine Equipment: Optimized for heavy CNC lathes, high-power floor lathes, and large vertical turning centers (VTL).
6. Material Comparison & Workpiece Matrix
Review grade capability across ISO workpiece classifications to ensure correct operational deployment.
| ISO Material Category | Target Materials | NC3120 Performance Suitability |
|---|---|---|
| P (Steel) | Alloy steel, carbon steel, and forged steels (e.g., 42CrMo4, 34CrNiMo6) | Outstanding (Primary CVD Grade for Heavy Roughing P20–P40) |
| K (Cast Iron) | Ductile iron and heavy gray cast iron castings | Suitable (Excellent Toughness for K25–K40 Roughing) |
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 delays.
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 packaged in a single box?
A: Each standard factory box contains exactly 10 pieces of SNMG190616-GR NC3120 inserts.
Q: What makes NC3120 grade ideal for heavy roughing?
A: NC3120 combines a high-toughness carbide substrate with a robust CVD coating formulated to resist thermal cracking and chipping during high-feed steel turning.
Q: Which tool holders fit this SNMG 1906 insert size with a 1.6mm radius?
A: It mounts securely into standard ISO negative turning tool holders designed for SNMG 1906 inserts, such as MSSNR or PSBNR heavy-duty toolholder assemblies.
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.