Korloy DCMT11T308-HMP NC3020 Steel Turning Insert, R0.8 (10pcs)
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The Original Korloy DCMT11T304-HMP NC3020 (ANSI Standard: DCMT 32.52) is a robust 55° diamond turning insert engineered for high-efficiency semi-finishing of Steel (P) and Carbon Steel. Featuring a strong 0.8mm (1/32") nose radius, this insert offers the highest edge security in the DCMT 11T3 range. The NC3020 CVD coating provides a superior thermal barrier and exceptional wear resistance, making it the primary choice for high-speed continuous cutting where productivity and long tool life are critical.
High-Efficiency Performance: The R0.8 radius allows for significantly higher feed rates compared to smaller radii, making it perfect for rapid stock removal in steel while still maintaining an excellent surface finish thanks to the HMP chipbreaker.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DCMT11T308-HMP |
| ANSI Code | DCMT 32.52 |
| Grade | NC3020 (Premium CVD for Steel) |
| Nose Radius | 0.8 mm (Maximum Edge Strength) |
Core Performance Benefits:
- Maximum Edge Toughness: The 0.8mm radius dissipates heat over a larger area and resists chipping better than R0.2 or R0.4 models.
- HMP Chipbreaker: Optimized for semi-finishing to light roughing, ensuring smooth chip flow and preventing "bird-nesting" at higher feeds.
- High Speed Stability: The NC3020 CVD coating allows for increased surface speeds (Vc), reducing cycle times in mass production.
- Superior Wear Resistance: Excellent protection against crater and flank wear during the machining of abrasive carbon and alloy steels.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon/Mild Steel | 200 - 380 m/min | 0.15 - 0.40 mm/rev | 0.8 - 3.5 mm |
| Alloy Steel (4140 / 4340) | 180 - 300 m/min | 0.12 - 0.35 mm/rev | 0.8 - 3.0 mm |
| Cast Steel / Mold Steel | 120 - 240 m/min | 0.15 - 0.30 mm/rev | 1.0 - 4.0 mm |
Compatible Tool Holders:
Fits all standard 55-degree diamond tool holders for 11T3 size:
- External Holders: SDJCR/L 2020K11 / 2525M11 / 3232P11
- Internal Boring Bars: S20R-SDUCR11 / S25S-SDUCR11 / S32T-SDUCR11
Steel Machining Tip: Choosing your Radius
Why select the R0.8 (DCMT11T308) over smaller sizes?
Ideal for semi-roughing and high-feed finishing. It handles interrupted cuts better and is much more durable on larger, heavier workpieces.
The versatile standard. Choose this if you need a mix of high-quality finish and lower cutting pressure for smaller or less rigid machine setups.
Pro Insight: Use the R0.8 when you want to "push" the machine. Because it allows for a larger feed rate, you can significantly decrease your part cycle time without sacrificing tool life.
Packaging: 10 pieces per box.
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.