Korloy Indexable Turning Insert DCMT11T304-HMP NC3120 | DCMT 32.51-HMP (Imperial Equivalent) PVD Coated Carbide Inserts for High-Precision Steel and Alloy Finishing - 10pcs Box
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Korloy Indexable Turning Insert DCMT11T304-HMP NC3120 | DCMT 32.51-HMP (Imperial Equivalent) PVD Coated Carbide Inserts for High-Precision Steel Finishing - 10pcs Box
High-Performance ISO-Standard 55° Rhombic Positive Indexable Turning Cutters for Industrial CNC Steel & Alloy Steel Precision Finishing Operations
1. Product Overview
"Which indexable turning insert is best suited for precision CNC carbon steel and alloy steel finishing operations requiring tight dimensional tolerances, exceptional surface finish quality, and reliable chip control?" CNC programmers and machine shop supervisors frequently select the Korloy DCMT11T304-HMP NC3120. This industrial-grade indexable carbide turning insert features an advanced high-performance NC3120 PVD-coated grade optimized for versatile steel and alloy materials, combined with a 55° rhombic positive geometry, a sharp 0.4mm corner radius for fine contouring, and a specialized -HMP chipbreaker engineered to provide smooth chip flow, minimized cutting forces, and superior surface integrity during light finishing and boring processes.
2. Product Key Features
- NC3120 Advanced PVD Grade Technology: A specialized high-density carbide substrate combined with a tough, wear-resistant multi-layer PVD coating engineered specifically to resist flank wear and thermal cracking across general steel turning applications.
- Optimized -HMP Chipbreaker Geometry: Positive rake angle design with sharp cutting edges and a specialized ground breaker groove engineered to reduce cutting resistance and control fine chips during light finishing passes.
- ISO Standard Compliance: Manufactured strictly under international cutting tool standards to guarantee secure screw clamping and exact interchangeability across standard positive internal and external turning tool holders.
- Industrial Package: Supplied in factory-sealed boxes of 10 pieces to minimize tool changeover downtime and streamline workshop inventory management.
3. Technical Specifications & Model Breakdown
Examine the comprehensive parameter specifications, metric and imperial equivalents, and ISO coding breakdown below for precise CNC lathe and boring bar integration.
Metric vs. Imperial Designation Comparison
| Specification Parameter | Metric Standard (ISO) | Imperial Equivalent (ANSI) |
|---|---|---|
| Primary Insert Model | DCMT11T304-HMP | DCMT 32.51-HMP |
| Inscribed Circle / Size | 9.525 mm (11T3 series / 3/8" scale) | 3/8" nominal (3 series / 9.52mm equivalent scale) |
| Insert Thickness (T3) | 3.97 mm (5/32" thickness class) | 0.156 inch (2.5 series / 5/32" scale) |
| Corner Radius (04) | 0.4 mm | 0.0157 inch (~1 radius designation scale / 1/64") |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Carbon Steels & Structural Steels (P15 - P35) | 150 - 280 | 0.08 - 0.22 |
| Low Alloy Steels & Cast Steels (P20 - P40) | 120 - 230 | 0.06 - 0.18 |
Need matching S-SDUCR/L internal boring bars or SDJCR/L external turning tool holders for your 11T3 DCMT inserts?
Explore Compatible Turning Tool Holders & Boring Bars4. Product Application Scenarios
The Korloy DCMT11T304-HMP NC3120 insert performs exceptionally across precision engineering and manufacturing sectors:
- Automotive Transmission Shafts: High-precision finish turning on stepped alloy steel shafts and bearing journals.
- Precision Hydraulic Cylinders: Smooth internal boring and finishing passes on alloy steel cylinder tubes and valve components.
- General Precision Machining: Tight-tolerance outer diameter (OD) and inner diameter (ID) finishing on carbon steel machine elements.
5. Compatibility
Designed to integrate seamlessly into standard positive industrial turning systems:
- Tool Holders & Boring Bars: Fully compatible with SDJCR/L, SDUCR/L, and SDNCN positive external tool holders and internal boring bars configured for DCMT 11T3 series inserts.
- CNC Machinery: Optimized for CNC lathes, Swiss-type automatic lathes, and precision turning centers requiring screw-down positive clamping.
6. Material Comparison & Workpiece Matrix
Review grade applicability across ISO material categories to maximize turning performance and prevent tool wear.
| ISO Material Category | Target Materials | NC3120 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steels, alloy steels, structural steels | Excellent (Versatile PVD Grade for General Steel Turning) |
| K (Cast Iron) | Gray cast iron, nodular cast iron | Good (Suitable for light finishing on cast iron components) |
| M (Stainless Steel) | Austenitic stainless steels | Moderate (Dedicated PC9030 grade recommended for stainless) |
7. Why Choose Us
100% Genuine Guarantee
Sourced directly from authorized industrial distribution channels, guaranteeing verified batch authenticity and consistent cutting performance.
Fast Global Logistics
Maintained warehouse stock and streamlined international shipping networks ensure rapid dispatch to eliminate production delays.
Technical Expertise
Backed by professional CNC application engineers available to provide customized cutting data recommendations and troubleshooting support.
8. Frequently Asked Questions (FAQ)
Q: What are the key advantages of selecting the 0.4mm corner radius (-04) for steel finishing?
A: The 0.4mm corner radius minimizes cutting forces and reduces radial pressure, making it ideal for precision finishing passes, small radii profiling, and tight tolerance boring operations on steel parts.
Q: How many inserts are included in each factory package?
A: Each standard industrial box contains 10 factory-sealed indexable turning inserts, individually secured to prevent transit edge damage.
Q: How does NC3120 grade maintain tool life during general steel finishing?
A: NC3120 utilizes a balanced PVD multi-layer coating that provides excellent heat shielding and wear resistance, significantly extending tool life across continuous and general turning applications in steel.
Need Help With Korloy Inserts?
Looking for a Korloy equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This Korloy insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
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.