KORLOY SNMM190612-GH NC3120 Indexable Carbide Turning Inserts | SNMM644-GH (ANSI Equivalent) CVD Coated Inserts for Heavy-Duty Steel Roughing - 10pcs/box
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KORLOY SNMM190612-GH NC3120 Indexable Carbide Turning Inserts | SNMM644-GH (ANSI Equivalent) CVD Coated Inserts for Heavy-Duty Steel Roughing - 10pcs/box
High-Performance ISO-Standard 90° Square Negative Indexable Roughing Cutters Featuring NC3120 CVD Coating and GH Positive Chipbreaker for Extreme Steel Machining
1. Product Overview
"Which indexable turning insert offers maximum edge strength and fracture resistance when performing heavy roughing and interrupted cutting on carbon steels and alloy steels?" CNC programmers and manufacturing shop managers routinely specify the KORLOY SNMM190612-GH NC3120. This industrial-grade roughing insert combines a tough NC3120 CVD-coated carbide grade with a robust -GH double-sided roughing chipbreaker geometry, delivering exceptional thermal shock resistance, heavy depth-of-cut capability, and long tool life. Featuring a 90° square negative design with 8 usable cutting edges and a rugged 1.2mm corner radius, it ensures maximum productivity in demanding high-removal-rate machining environments.
2. Product Key Features
- NC3120 CVD Coated Grade: Engineered with a robust multi-layer Chemical Vapor Deposition (CVD) coating designed to withstand extreme thermal loads and abrasive wear during high-volume steel roughing.
- GH Roughing Chipbreaker & 1.2mm Radius: Features an optimized positive-land geometry for high-feed roughing, providing smooth chip breaking and high edge strength supported by a sturdy 1.2mm corner radius.
- Double-Sided Edge Economy: Square negative configuration provides 8 total indexable cutting edges (4 per side), maximizing cost efficiency per edge.
- Standard Industrial Packaging: Delivered in protective factory boxes containing 10 pieces for secure inventory control.
3. Technical Specifications & Model Breakdown
Examine the comprehensive technical parameters, metric-imperial dimensional cross-references, and ISO nomenclature code breakdown below.
Metric vs. Imperial Designation Comparison
| Specification Parameter | Metric Standard (ISO) | Imperial Equivalent (ANSI) |
|---|---|---|
| Primary Insert Model | SNMM190612-GH | SNMM644-GH |
| 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 & Low Alloy Steel (e.g., 1045, 4140) | 150 - 280 | 0.30 - 0.65 |
| Cast Steel & Heavy Forgings | 120 - 220 | 0.25 - 0.55 |
Need matching DSSNR or PSBNR heavy-duty external turning toolholders for your SNMM 1906 inserts?
Explore Compatible External Turning Tool Holders & Boring Bars4. Product Application Scenarios
The KORLOY SNMM190612-GH NC3120 insert is engineered for heavy roughing and aggressive stock removal:
- Large Shaft Roughing: Aggressive metal removal on heavy steel forgings, marine shafts, and large industrial rolls.
- Oil & Gas Components: Rough turning thick-walled drill collars, casing heads, and heavy tubular components.
- Interrupted Cut Machining: Handling surface scale, weldments, and forged steel parts with intermittent shock loads.
5. Compatibility
Designed to integrate seamlessly with heavy-duty ISO negative toolholding systems:
- Toolholders: Fully compatible with DSSNR/L, PSBNR/L, and CSBNR/L heavy-duty pin-and-clamp external turning tool holders configured for SNMM 1906 geometry.
- Machine Equipment: Built for high-horsepower heavy CNC lathes, vertical turning lathes (VTLs), and rigid production turning centers.
6. Material Comparison & Workpiece Matrix
Review grade applicability across standard ISO workpiece classifications to ensure correct tool selection.
| ISO Material Category | Target Materials | NC3120 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steel, alloy steel, and structural steel castings (e.g., 4140, 1045) | Outstanding (Optimized CVD Grade for P20–P40 Heavy Roughing) |
| K (Cast Iron) | Ductile iron and grey cast iron components | Suitable (Good Thermal Wear Resistance for K15–K30 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 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 SNMM190612-GH NC3120 inserts.
Q: Is this insert suitable for interrupted cuts and forgings with scale?
A: Yes, the combination of the tough NC3120 CVD substrate and the robust -GH roughing chipbreaker provides excellent shock resistance against surface scale and interrupted cuts.
Q: Which tool holders fit this SNMM 1906 insert?
A: It fits heavy-duty ISO negative turning tool holders designed for SNMM 1906 inserts, such as DSSNR or PSBNR systems.
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.