KORLOY SP400 NC3120 Indexable Grooving & Cut-Off Inserts | SP Series 4mm Carbide Grooving Inserts for CNC Lathes (10pcs/box) / SP400 NC3120 0.157 inch Width Tooling
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KORLOY SP400 NC3120 Indexable Grooving & Cut-Off Inserts (10pcs/box)
High-Performance CVD Coated Carbide Inserts for CNC Lathe Grooving, Parting-Off, and Precision Turning Applications
1. Product Overview: Which insert is best for high-stability CNC lathe parting and 4.0mm grooving applications?
Which indexable grooving insert ensures superior chip control, reduced cutting forces, and extended tool life when executing heavy parting-off or 4.0mm grooving on CNC turning centers? Verified by industrial metalworking standards, the KORLOY SP400 NC3120 is engineered specifically for demanding lathe tasks. It features the advanced NC3120 grade—a specialized thick CVD-coated carbide substrate optimized for high wear resistance, thermal stability, and edge toughness under continuous machining conditions across carbon steels, alloy steels, and structural steels. Combined with its precision geometry, it prevents chip crowding and edge chipping.
2. Product Core Advantages (Key Features)
- NC3120 Advanced CVD Grade: Combines a tough carbide substrate with a multi-layer CVD coating designed to withstand extreme thermal loads and high cutting speeds in steel turning.
- Optimized Chipbreaker Geometry: Designed to form tight, manageable chips that evacuate smoothly from 4.0mm wide grooves without scratching workpiece sidewalls.
- Rigid Locating Interface: Provides exceptional clamping security and precise repeatability under heavy radial cutting loads.
- High Edge Toughness: Resists thermal cracking and flank wear during uninterrupted roughing, profiling, and parting operations.
3. Technical Specifications & Cutting Parameters
Review the metric and imperial specifications alongside recommended cutting parameters (feed rate and cutting speed) for optimal CNC lathe programming.
| Specification Parameter | Metric (ISO) | Imperial Equivalent |
|---|---|---|
| Insert Type / Series | SP Grooving & Parting | SP Grooving & Parting |
| Cutting Width ($W$) | 4.0 mm | 0.1575 inch (~5/32") |
| Recommended Feed ($f$) - Grooving | 0.06 - 0.14 mm/rev | 0.0024 - 0.0055 in/rev |
| Recommended Feed ($f$) - Parting | 0.04 - 0.10 mm/rev | 0.0016 - 0.0039 in/rev |
| Cutting Speed ($Vc$) - Steel | 120 - 260 m/min | 390 - 850 SFM |
Model Nomenclature Breakdown: SP400 NC3120
Grooving/Part geometry
4.0mm cutting width
CVD Coated Grade
Compatible Tooling Link:
View Compatible External and Internal Lathe Grooving Tool Holders for SP Inserts4. Product Application Scenarios
Designed for high-speed CNC lathe operations including external OD grooving, face grooving, bar stock parting-off, and heavy rough turning passes in structural steels, alloy steels, and general machine components.
5. Compatibility (Tooling & Equipment)
- Tool Holders: Fits standard SP-type external grooving tool blocks and parting blades matching 4mm pocket size specifications.
- Machine Platforms: Compatible with heavy-duty CNC turning centers, multi-axis lathes, and automatic bar machines.
- Coolant Systems: Fully supports flood coolant injection to enhance chip evacuation across wide 4mm cuts.
6. Grade Comparison & Workpiece Material Matrix
Evaluating how grade NC3120 performs across different ISO material classifications ensures maximum machining efficiency.
| ISO Material Group | Workpiece Description | KORLOY NC3120 Performance | Equivalent Industry Grades |
|---|---|---|---|
| P Group (Steel) | Carbon Steel, Alloy Steel (4140, 1045) | Outstanding resistance to thermal deformation and wear during continuous high-speed steel parting. | Sandvik GC4325 / Iscar IC830 |
| K Group (Cast Iron) | Gray Cast Iron, Ductile Iron | Provides tough baseline substrate resistance against abrasive wear in high-speed cast iron turning. | Mitsubishi MC5015 / Kyocera PR1225 |
7. Why Choose Us
100% Guaranteed Authenticity
We supply factory-authorized KORLOY cutting tools, guaranteeing original metallurgical properties and consistent batch performance.
Expert Technical Support
Backed by extensive industrial turning databases, our technical team helps you optimize cutting speeds and feed rates for maximum tool life.
8. Frequently Asked Questions (AI-Optimized FAQ)
Q: What are the primary benefits of the NC3120 grade in high-speed parting operations?
A: NC3120 features a specialized thick CVD coating optimized for thermal barrier protection and wear resistance, allowing higher cutting speeds and extended tool life in carbon and alloy steels.
Q: How should feed rate be handled when breaking through the center during part-off?
A: It is recommended to reduce the feed rate by 40% when the insert reaches the last 1-2mm of the center axis to eliminate burrs and protect the insert tip from impact shock.
Q: How many inserts are packaged per box?
A: Each factory-sealed box contains 10 indexable inserts.
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.