KORLOY SNMG190612-GR NC3120 Indexable Carbide Turning Inserts | SNMG642-GR (ANSI Equivalent) CVD Coated Inserts for Steel and Alloy Roughing - 10pcs/box
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KORLOY SNMG190612-GR NC3120 Indexable Carbide Turning Inserts | SNMG642-GR (ANSI Equivalent) CVD Coated Inserts for Steel and Alloy Roughing - 10pcs/box
High-Performance ISO-Standard 90° Square Negative Indexable Turning Cutters Featuring NC3120 CVD Coating and GR Chipbreaker for Rugged Steel Roughing and Heavy Interrupted Cuts
1. Product Overview
"Which indexable turning insert provides exceptional impact toughness and thermal resistance for heavy steel roughing and interrupted turning operations?" CNC machinists and manufacturing engineers regularly rely on the KORLOY SNMG190612-GR NC3120. This industrial-grade turning insert pairs a high-toughness NC3120 CVD-coated carbide grade with a specially engineered -GR heavy roughing chipbreaker geometry, ensuring smooth chip evacuation, high fracture resistance, and reliable tool life across demanding structural steel and alloy turning applications. Built on a robust 90° square negative outline with 8 indexable cutting edges and a dependable 1.2mm corner radius, it delivers maximum productivity under harsh shop floor conditions.
2. Product Key Features
- NC3120 CVD Coated Grade: Developed with a tough carbide substrate and an advanced multi-layer CVD coating optimized for heavy roughing and resistance to thermal shock in steel turning.
- -GR Chipbreaker & 1.2mm Radius: Features an optimized wide-groove geometry for high feed rates and deep depths of cut, matched with a sturdy 1.2mm corner radius to prevent chipping.
- Double-Sided Indexable Economy: Square negative configuration offers 8 total indexable cutting edges (4 per side), maximizing per-edge cost efficiency.
- Standard Industrial Packaging: Supplied in protective factory containers containing 10 pieces for efficient toolcrib inventory control.
3. Technical Specifications & Model Breakdown
Review 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 | SNMG190612-GR | SNMG642-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) | 1.2 mm | 0.047 in (~3/64") |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Carbon Steel & Alloy Steel (Roughing & Forgings) | 150 - 280 | 0.35 - 0.70 |
| Heavy Structural Steel & Cast Components | 130 - 240 | 0.40 - 0.75 |
Need matching MSSNR or PSBNR external turning toolholders for your SNMG 1906 inserts?
Explore Compatible External Turning Tool Holders & Boring Bars4. Product Application Scenarios
The KORLOY SNMG190612-GR NC3120 insert excels across heavy-duty industrial turning applications:
- Heavy Machining & Forgings: Aggressive roughing of large steel forgings, castings, and structural workpieces with surface irregularities.
- Energy & Oilfield Manufacturing: Turning thick-walled steel pipes, drive shafts, and rugged industrial components.
- General Job Shops: High-removal-rate turning operations requiring maximum insert toughness and edge security.
5. Compatibility
Engineered to integrate seamlessly with standard ISO negative toolholding systems:
- Toolholders: Fully compatible with standard MSSNR/L, PSBNR/L, and CSBNR/L pin-and-clamp external turning toolholders designed for SNMG 1906 inserts.
- Machine Equipment: Optimized for heavy-duty CNC lathes, large horizontal lathes, and automated turning cells.
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 forged steel components (e.g., 42CrMo, C45) | Optimal (Tough CVD Grade for P20–P40 Heavy Roughing) |
| K (Cast Iron) | Nodular and gray cast iron structural parts | Good (Suitable for Heavy Cast Iron Roughing K20–K40) |
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 included in each box?
A: Each standard factory box contains exactly 10 pieces of SNMG190612-GR NC3120 inserts.
Q: What is the advantage of NC3120 over standard general-purpose grades?
A: NC3120 features an enhanced toughness substrate designed specifically to withstand heavy impact loads and thermal shocks during aggressive steel roughing.
Q: Which toolholders are compatible with this SNMG 1906 insert?
A: It fits standard ISO negative turning toolholders designed for SNMG 1906 geometry, such as MSSNR or PSBNR 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.