Korloy SP300 NC3120 3mm Single-Ended Universal Parting Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy SP300 NC3120 is the premier 3.0mm Single-Ended Universal Parting and Grooving Insert. Designed to handle the widest variety of Steel (P-Group) materials, the NC3120 Universal Grade features a cutting-edge CVD coating that bridges the gap between high productivity and rugged durability. The 3mm single-ended design provides superior stability for deep radial cuts, making it the most versatile tool in any CNC machine shop's arsenal.
The Shop Standard: NC3120 is engineered for those who want one grade that can do it all. It offers the toughness needed for slight interruptions and the wear resistance required for medium-to-high speed continuous parting.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| Insert Style | Single-Ended (High Stability) |
| Cutting Width (W) | 3.0 mm (+/- 0.1mm) |
| Grade | NC3120 (General Purpose Steel Grade) |
| Coating Type | Advanced CVD (TiCN + Al2O3 + TiN) |
Core Performance Benefits:
- Versatile Performance: Excellent for Carbon Steels, Alloy Steels, and Low-Carbon Mild Steels.
- Balanced Tool Life: Prevents both rapid flank wear and unexpected edge chipping, ensuring predictable replacement cycles.
- Deep Parting Capability: The single-ended shank provides the massive clamping area needed for large-diameter solid bar parting.
- Superior Surface Finish: The SP-style chipbreaker controls the 3mm wide chip, keeping it away from the finished walls of the groove.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Mild Steel / Low Carbon | 120 - 210 m/min | 0.08 - 0.20 mm/rev |
| Medium Carbon Steel (1045) | 100 - 180 m/min | 0.07 - 0.18 mm/rev |
| Alloy Steel (4140/SCM440) | 80 - 150 m/min | 0.05 - 0.15 mm/rev |
Compatible Tool Holders:
Ensure maximum system rigidity with these professional holders:
- High-Rigidity Blades: SPB 26-3 / SPB 32-3
- Blade Blocks: SMBB 2026 / 2532 Series
- Shank Tool Holders: NCIH 20-3 / NCIH 25-3
Machinist Tip: The "Grade Selection" Guide
Korloy SP-Series Grade Hierarchy for Steel:
The Safe Choice. Your first option for general steel work. It balances speed and toughness so you don't have to switch inserts between different jobs.
For High Production. Best for clean, round bars on stable machines where you want to maximize RPM and minimize cycle time.
For Broken Cuts. Use this when parting hex bars or when the machine is old and vibrating. It prevents the insert from snapping.
Pro Advice: When parting with the SP300 NC3120, always aim for a center height of +/- 0.05mm. Being off-center is the #1 cause of insert failure in 3mm parting operations.
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.