Korloy Indexable Turning Insert DCMT070204-C25 PC9030 | DCMT 21.51-C25 (Imperial Equivalent) PVD Coated Carbide Inserts for Stainless Steel and Alloy Machining - 10pcs Box
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Korloy Indexable Turning Insert DCMT070204-C25 PC9030 | DCMT 21.51-C25 (Imperial Equivalent) PVD Coated Carbide Inserts for High-Precision Stainless Steel Machining - 10pcs Box
High-Performance ISO-Standard 55° Rhombic Positive Indexable Turning Cutters for Industrial CNC Stainless Steel & Superalloy Precision Machining Operations
1. Product Overview
"Which indexable turning insert is best suited for precision CNC austenitic stainless steel and high-temperature alloy machining operations requiring superior thermal crack resistance, smooth chip control, and extended tool life?" CNC programmers and machine shop supervisors frequently select the Korloy DCMT070204-C25 PC9030. This industrial-grade indexable carbide turning insert features an advanced high-performance PC9030 PVD-coated grade optimized for stainless steels and difficult-to-cut materials, combined with a 55° rhombic positive geometry, a sharp 0.4mm corner radius for fine contouring, and a specialized -C25 chipbreaker engineered to provide excellent chip evacuation, reduced cutting heat, and superior edge stability during continuous and light interrupted turning processes.
2. Product Key Features
- PC9030 Advanced PVD Grade Technology: A specialized tough fine-grained carbide substrate combined with a high-oxidation-resistance multi-layer PVD coating engineered specifically to combat built-up edge and thermal wear in stainless steel turning.
- Optimized -C25 Chipbreaker Geometry: Positive rake angle design with a specialized sharp groove engineered to curl and break stringy stainless steel chips effectively at lower-to-medium feed rates.
- ISO Standard Compliance: Manufactured strictly under international cutting tool standards to guarantee secure screw clamping and exact interchangeability across standard positive internal boring bars 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 internal boring bar integration.
Metric vs. Imperial Designation Comparison
| Specification Parameter | Metric Standard (ISO) | Imperial Equivalent (ANSI) |
|---|---|---|
| Primary Insert Model | DCMT070204-C25 | DCMT 21.51-C25 |
| Inscribed Circle / Size | 6.35 mm (07 series / 1/4" scale) | 1/4" nominal (2 series / 6.35mm equivalent scale) |
| Insert Thickness (02) | 2.38 mm (3/32" thickness class) | 0.094 inch (1.5 series / 3/32" 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 |
|---|---|---|
| Austenitic Stainless Steels (M10 - M30) | 120 - 220 | 0.08 - 0.20 |
| PH Stainless Steels & Heat-Resistant Alloys | 80 - 150 | 0.06 - 0.15 |
Need matching S-SDUCR/L small-diameter internal boring bars or SDJCR/L external turning tool holders for your 0702 DCMT inserts?
Explore Compatible Turning Tool Holders & Boring Bars4. Product Application Scenarios
The Korloy DCMT070204-C25 PC9030 insert performs exceptionally across demanding stainless steel fabrication and precision industrial sectors:
- Chemical & Valve Components: Precision turning and internal boring on 304 and 316 stainless steel valve bodies and fittings.
- Medical & Food Processing Hardware: Fine finishing passes on corrosion-resistant surgical stainless steel shafts and rollers.
- Aerospace Alloy Machining: Tight-tolerance profiling on heat-resistant stainless steel and superalloy miniature components.
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 0702 series inserts.
- CNC Machinery: Optimized for CNC lathes, Swiss-type automatic turning centers, and multi-axis mill-turn machines requiring high-precision 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 | PC9030 Performance Suitability |
|---|---|---|
| M (Stainless Steel) | Austenitic, martensitic, and precipitation-hardening stainless steels | Excellent (Dedicated PVD Grade for Stainless Steel Turning) |
| S (Superalloys) | Nickel-based alloys, titanium alloys, heat-resistant steels | Good (High thermal crack resistance for high-temp alloys) |
| P (Steel) | Low carbon and alloy steels | Moderate (NC3020 recommended for dedicated carbon steel turning) |
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: Why is PC9030 grade specifically recommended for stainless steel turning instead of standard steel grades?
A: PC9030 utilizes a specialized PVD multi-layer coating that resists chemical reaction, built-up edge, and thermal shock inherent to machining sticky austenitic stainless steels, vastly extending operational tool life.
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 the -C25 chipbreaker help when machining stringy materials like 304 stainless steel?
A: The -C25 geometry features a precision-ground positive rake form designed to control chip flow tightly, preventing long bird's-nest chips from wrapping around the workpiece or tool holder.
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.