Korloy SP400 NC3020 4mm Single-Ended Parting & Heavy Grooving Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy SP400 NC3020 is a heavy-duty 4.0mm Single-Ended Parting and Grooving Insert. Engineered for Steel (P-Group) applications requiring maximum edge strength, the NC3020 CVD Grade features a high-performance TiCN + Al2O3 coating. The 4mm width provides the structural integrity needed to handle large-diameter solid bars and deep, wide grooves where thinner inserts might deflect or vibrate.
Heavy-Duty Stability: As a single-ended (one-way) insert, the SP400 offers a massive seating base within the tool holder. This design is crucial for 4.0mm wide cuts, as it provides the necessary rigidity to prevent chatter marks and ensure perfectly straight cuts on large workpieces.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| Insert Style | Single-Ended (Heavy Duty Specialist) |
| Cutting Width (W) | 4.0 mm (+/- 0.1mm) |
| Grade | NC3020 (Premium CVD for Steel) |
| Recommended for | Large Parting, Heavy Grooving |
Core Performance Benefits:
- Maximum Fracture Resistance: The 4.0mm profile is designed to withstand high radial forces, making it ideal for tough alloy steels and forged parts.
- High-Velocity Production: NC3020's advanced CVD layer protects the carbide from high-temperature deformation during long-duration cuts.
- Robust Chip Management: Optimized chipbreaker geometry narrows the 4mm chip, allowing it to flow freely out of deep radial slots.
- Solid Clamping Force: Designed for high-pressure clamping in SPB blades to ensure accuracy in heavy roughing.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Low Carbon Steel (1020) | 120 - 220 m/min | 0.10 - 0.25 mm/rev |
| Medium Carbon Steel (1045) | 100 - 180 m/min | 0.08 - 0.22 mm/rev |
| Alloy Steel (4140/SCM440) | 80 - 160 m/min | 0.07 - 0.18 mm/rev |
Compatible Tool Holders:
For best results, use with high-rigidity 4mm parting systems:
- Heavy Duty Blades: SPB 32-4 / SPB 26-4 Blades
- Blade Mounting Blocks: SMBB 2532 / 3232 Blocks
Machinist Tip: Scaling Up to SP400
Why choose 4.0mm over 3.0mm?
Unstable Conditions. If your workpiece is overhanging or you're dealing with raw forging surfaces, the extra 1mm of width in the SP400 provides a massive increase in tool life and prevents the insert from "snapping" under sudden load spikes.
Production Speed. NC3020 is your go-to for high-speed continuous work. If you find the edge is chipping due to interrupted cuts, consider moving to NC3120 for slightly more toughness at the expense of top speed.
Pro Advice: Because the SP400 is a wider insert, it generates more heat. Ensure your coolant pressure is adequate to reach the tip, especially when the depth of cut exceeds 20mm.
Packaging: 10 pieces per box.
Korloy SP400 insert for large diameter parting, 4mm steel grooving insert NC3020, heavy duty parting off tool for CNC, SP400 cutting speed and feed, deep slotting 4mm carbide insert
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.