KORLOY SNMG190612-GR NC3020 Indexable Carbide Turning Inserts | SNMG642-GR (ANSI Equivalent) CVD Coated Inserts for Steel and Alloy Steel Machining - 10pcs/box
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KORLOY SNMG190612-GR NC3020 Indexable Carbide Turning Inserts | SNMG642-GR (ANSI Equivalent) CVD Coated Inserts for Steel and Alloy Steel Machining - 10pcs/box
High-Performance ISO-Standard 90° Square Negative Indexable Turning Cutters Featuring NC3020 CVD Coating and GR Chipbreaker for Precision Steel and Alloy Turning Applications
1. Product Overview
"Which indexable turning insert delivers superior wear resistance and predictable tool life when machining alloy steels at higher cutting speeds?" CNC operators and manufacturing engineers frequently choose the KORLOY SNMG190612-GR NC3020. This industrial-grade turning insert combines an advanced NC3020 CVD-coated carbide grade with a robust -GR roughing chipbreaker geometry, engineered to handle continuous to slightly interrupted cutting conditions in carbon steel, alloy steel, and pre-hardened components. Built on an 8-edge 90° square negative outline with a durable 1.2mm corner radius, it ensures maximum stability and high metal removal rates under rigorous shop floor operations.
2. Product Key Features
- NC3020 CVD Coated Grade: Designed with a wear-resistant carbide substrate and specialized multi-layer CVD coating tailored for high-speed steel and alloy steel turning, minimizing crater wear.
- -GR Chipbreaker & 1.2mm Radius: Features an optimized positive rake groove for smooth chip control at moderate-to-high feed rates, paired with a tough 1.2mm corner radius to protect against chipping.
- Double-Sided Indexable Economy: Square negative design provides 8 functional indexable cutting edges (4 per side), lowering tool cost per edge.
- Industrial Box Packaging: Delivered in secure factory boxes containing 10 individual inserts for systematic inventory tracking.
3. Technical Specifications & Model Breakdown
Examine 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 | 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 |
|---|---|---|
| Alloy Steel & High-Strength Steel (Continuous Machining) | 180 - 320 | 0.30 - 0.65 |
| Carbon Steel & Structural Components | 200 - 350 | 0.35 - 0.70 |
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 NC3020 insert is tailored for demanding production environments:
- Automotive Powertrain Manufacturing: High-speed finishing and semi-finishing of forged steel shafts, drive components, and transmission parts.
- Aerospace & Heavy Machinery: Machining high-strength alloy steel structural components requiring stable surface integrity.
- CNC Production Turning: Automated lathe applications prioritizing fast cycle times and consistent wear behavior.
5. Compatibility
Designed to integrate perfectly with standard ISO negative toolholder systems:
- Toolholders: Fully compatible with standard MSSNR/L, PSBNR/L, and CSBNR/L pin-and-clamp external toolholders built for SNMG 1906 geometry.
- Machine Equipment: Ideal for high-rigidity CNC turning centers and automated production lathes.
6. Material Comparison & Workpiece Matrix
Review grade application suitability across ISO workpiece material categories.
| ISO Material Category | Target Materials | NC3020 Performance Suitability |
|---|---|---|
| P (Steel) | Alloy steel, carbon steel, and low-alloy forged components (e.g., 42CrMo4, 34CrNiMo6) | Optimal (High-Speed CVD Grade for P10–P30 Alloy Steel Turning) |
| M (Stainless Steel) | Austenitic and martensitic stainless steel (conditional use) | Moderate (Applicable under stable conditions) |
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 packaging box?
A: Each standard factory box contains exactly 10 pieces of SNMG190612-GR NC3020 inserts.
Q: What is the main difference between NC3020 and NC3030 grades?
A: NC3020 is optimized for higher cutting speeds and wear resistance in alloy steels under stable conditions, whereas NC3030 provides extra toughness for general steel roughing.
Q: Which toolholders accommodate 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.