Korloy SP400 NC3030 4mm Single-Ended Parting Insert for Heavy Interrupted Cuts (10pcs)
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The Original Korloy SP400 NC3030 is a heavy-duty 4.0mm Single-Ended Parting and Grooving Insert engineered for the most demanding machining environments. When parting large-diameter solid bars or cutting through interrupted surfaces (like hex bars or keyed shafts), the NC3030 Ultra-Tough Grade provides the necessary shock absorption to prevent edge fracture. The 4mm width offers maximum blade rigidity, making it the premier choice for heavy industrial turning.
Built for Heavy Impact: NC3030 is Korloy’s flagship grade for unstable conditions. Combined with the 4.0mm single-ended design, this insert excels where others fail—handling mechanical shock and vibration with ease while maintaining a predictable tool life.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| Model Code | SP400 |
| Cutting Width (W) | 4.0 mm |
| Grade | NC3030 (Maximum Toughness CVD) |
| Design | Single-Ended (Deep & Heavy Duty) |
Core Performance Benefits:
- Maximum Edge Strength: The 4.0mm profile provides a massive cross-section to resist the bending forces of heavy-duty plunging.
- Anti-Fracture Technology: NC3030 substrate is optimized to stop crack propagation, even during violent interrupted cuts in forged steel.
- Superior Heat Management: Advanced CVD coating shields the tool from the intense heat generated when cutting 4mm wide grooves.
- Enhanced Stability: The single-ended design ensures the insert is locked securely in the holder, eliminating vibration during large-diameter parting.
Recommended Cutting Parameters (Heavy/Interrupted):
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (Interrupted) | 60 - 140 m/min | 0.08 - 0.20 mm/rev |
| Alloy Steel (Forged/Black Skin) | 50 - 110 m/min | 0.06 - 0.18 mm/rev |
| Heavy Parting to Center | 40 - 90 m/min | 0.05 - 0.12 mm/rev |
Compatible Tool Holders:
Requires high-rigidity 4.0mm parting systems for safe operation:
- Heavy Duty Blades: SPB 32-4 / SPB 26-4
- Mounting Blocks: SMBB 2532 / 3232 Series
Machinist Tip: Why choose SP400 NC3030?
Optimizing your heavy-duty parting operations:
Maximum Edge Security. Use this grade if you are parting off large forged shafts or hexagonal bars. It sacrifices some cutting speed for extreme resistance against chipping and sudden breakage.
Speed Specialist. If you have a brand-new CNC machine and are parting clean, round carbon steel bars, NC3020 will allow for higher RPMs and longer wear life.
Pro Advice: For 4mm parting, machine rigidity is everything. Ensure your tool overhang is as short as possible. If the tool starts to vibrate, NC3030 is your best insurance policy against the insert shattering.
Packaging: 10 pieces per box.
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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.