Korloy SP300 NC3020 3mm Single-Ended Parting & Grooving Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy SP300 NC3020 is a high-performance 3.0mm Single-Ended Parting and Grooving Insert. Engineered for Steel (P-Group) machining, the NC3020 CVD Grade features a robust TiCN + Al2O3 coating that provides an exceptional thermal barrier during high-speed operations. The 3mm width is the industry standard for parting off solid bars and heavy-duty grooving, offering the ideal balance between edge strength and material conservation.
Maximum Depth & Stability: The single-ended SP300 design provides a longer, more rigid seating area in the tool holder. This eliminates the vibration common in double-ended inserts when plunging deep into solid workpieces, ensuring a flatter cut and better surface finish.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| Insert Style | Single-Ended (Deep Cut Specialist) |
| Cutting Width (W) | 3.0 mm (+/- 0.1mm) |
| Grade | NC3020 (CVD Coated for High-Speed Steel) |
| Main Application | Carbon Steel, Alloy Steel, Tool Steel |
Core Performance Benefits:
- High-Speed Wear Resistance: NC3020 is designed to stay sharp at higher RPMs, reducing cycle times in mass production.
- Rugged Edge Construction: The 3.0mm width provides high fracture resistance even when encountering slightly interrupted surfaces.
- Efficient Chip Evacuation: The top-face chipbreaker geometry forces chips to narrow and curl, preventing them from jamming in deep, narrow grooves.
- Extended Tool Life: Thick Al2O3 CVD layer protects the carbide substrate from crater wear and plastic deformation.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Low Carbon Steel (1020) | 140 - 240 m/min | 0.08 - 0.22 mm/rev |
| Medium Carbon Steel (1045) | 120 - 200 m/min | 0.07 - 0.20 mm/rev |
| Alloy Steel (4140/8620) | 90 - 170 m/min | 0.05 - 0.18 mm/rev |
Compatible Tool Holders:
Precision fit for Korloy SP-System and universal parting blocks:
- Standard Parting Blades: SPB 26-3 / SPB 32-3
- Blade Blocks: SMBB 2026 / 2532 Series
Machinist Tip: Why Single-Ended SP300?
Choosing between SP series and MGMN (double-ended) systems:
The Parting Specialist. Use SP300 for cutting off solid bars and very deep grooves. Because it only has one head, the entire back of the insert acts as a stabilizer, preventing the "vibration chatter" that can ruin surface finish in deep cuts.
The Profiling Specialist. Best for general grooving and side-turning. While it offers two edges for economy, it is limited in depth because the secondary edge can collide with the workpiece during deep plunging.
Pro Advice: When parting to center, reduce the feed rate by 50% for the final 2mm of the radius. This ensures a clean break and prevents the SP300 from chipping as the surface speed ($V_c$) drops to zero at the spindle center.
Packaging: 10 pieces per box.
Korloy SP300 single ended insert price, 3mm parting off tool for alloy steel, NC3020 grooving speed and feed chart, best inserts for deep grooving steel, SP300 vs MGMN300 for parting performance
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.