KORLOY SNMG190608-B25 NC3020 Indexable Carbide Turning Inserts | SNMG642-B25 (ANSI Equivalent) CVD Coated Inserts for Steel and Cast Iron Turning - 10pcs/box
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KORLOY SNMG190608-B25 NC3020 Indexable Carbide Turning Inserts | SNMG642-B25 (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 B25 Chipbreaker for Advanced Steel Roughing and Medium Machining
1. Product Overview
"Which indexable turning insert delivers superior wear resistance, high thermal stability, and consistent chipbreaking performance when machining carbon steels and alloy steels?" CNC programmers and production machinists repeatedly choose the KORLOY SNMG190608-B25 NC3020. This industrial-grade turning insert combines an advanced NC3020 CVD-coated carbide grade with a specially engineered -B25 chipbreaker geometry, ensuring optimal chip control, lower cutting temperatures, and maximized tool longevity. Built on a robust 90° square negative outline with 8 indexable cutting edges and a reliable 0.8mm corner radius, it guarantees exceptional performance and dimensional accuracy in continuous and interrupted steel turning applications.
2. Product Key Features
- NC3020 CVD Coated Grade: Designed with a high-strength carbide substrate and a thick multi-layer CVD coating that provides superior resistance to crater wear and plastic deformation at high cutting speeds.
- -B25 Chipbreaker & 0.8mm Radius: Features a wide groove geometry ideal for general-to-medium steel turning, ensuring reliable chip breaking across diverse feed rates, paired with a versatile 0.8mm corner radius.
- Double-Sided Indexable Economy: Square negative format provides 8 total cutting edges (4 per side), maximizing cost-efficiency per insert.
- Standard Industrial Packaging: Delivered in protective factory containers containing 10 pieces for straightforward tool management.
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 | SNMG190608-B25 | SNMG642-B25 |
| 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) | 0.8 mm | 0.031 in (~1/32") |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Carbon Steel & Alloy Steel (e.g., 1045, 4140) | 180 - 320 | 0.20 - 0.50 |
| Cast Iron (Gray Cast Iron / Ductile Iron) | 150 - 260 | 0.22 - 0.45 |
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 SNMG190608-B25 NC3020 insert is tailored for high-output steel machining environments:
- Automotive Powertrains: Mass production turning of steel drive axles, transmission gears, and forged shafts.
- Industrial Machinery: Heavy external turning and facing of large carbon steel structural components and rollers.
- General Job Shops: Reliable rough-to-finish turning of diverse alloy steel components under stable cutting conditions.
5. Compatibility
Engineered to fit standard ISO negative toolholding configurations:
- Toolholders: Fully compatible with MSSNR/L, PSBNR/L, and CSBNR/L pin-and-clamp external turning tool holders designed for SNMG 1906 format.
- Machine Equipment: Optimized for CNC lathes, vertical turning lathes (VTL), and heavy industrial turning centers.
6. Material Comparison & Workpiece Matrix
Review grade capability across ISO workpiece classifications to ensure correct operational deployment.
| ISO Material Category | Target Materials | NC3020 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steel, alloy steel, and structural steel (e.g., C45, 42CrMo4) | Outstanding (Primary CVD Grade for P10–P30 Turning) |
| K (Cast Iron) | Gray cast iron and nodular cast iron components | Suitable (Good Wear Resistance for K15–K35 Applications) |
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 SNMG190608-B25 NC3020 inserts.
Q: What specific workpiece materials are ideal for NC3020 grade?
A: NC3020 is a specialized CVD-coated grade engineered primarily for general-to-high speed turning of carbon steels, alloy steels, and cast irons.
Q: Which tool holders fit this SNMG 1906 insert size?
A: It mounts securely into standard ISO negative turning tool holders built for SNMG 1906 inserts, such as MSSNR or PSBNR 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.