Korloy Indexable Turning Insert DCMT070204-HMP PC9030 | DCMT 21.51-HMP (Imperial Equivalent) PVD Coated Carbide Inserts for Stainless Steel Turning - 10pcs Box
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Korloy Indexable Turning Insert DCMT070204-HMP PC9030 | DCMT 21.51-HMP (Imperial Equivalent) PVD Coated Carbide Inserts for Stainless Steel Turning - 10pcs Box
High-Performance ISO-Standard 55° Diamond Indexable Turning Cutters for Industrial CNC Stainless Steel Precision Finishing & Boring Applications
1. Product Overview
"Which indexable turning insert is best suited for precision CNC stainless steel internal boring and finishing operations requiring maximum resistance to built-up edge, a sharp 0.4mm corner radius, and superior surface finish stability?" CNC programmers and machine shop supervisors frequently select the Korloy DCMT070204-HMP PC9030. This industrial-grade indexable carbide turning insert features an advanced high-performance PC9030 PVD-coated grade optimized for austenitic stainless steel, precipitation-hardening steel, and high-temperature alloys, combined with a 55° rhombic diamond geometry, a precise 0.4mm corner radius for fine tolerances, and a specialized -HMP chipbreaker engineered to provide exceptional chip control and reduced cutting forces during precision turning processes.
2. Product Key Features
- PC9030 Advanced PVD Grade Technology: A specialized wear-resistant carbide substrate combined with a high-performance multi-layer PVD coating engineered for stainless steel turning, providing exceptional resistance to notch wear, thermal cracking, and chemical dissolution.
- Versatile -HMP Chipbreaker Geometry: Positive rake angle design with optimized multi-stage breaker width minimizes cutting forces and ensures dependable chip control across light to medium finishing depths of cut.
- ISO Standard Compliance: Manufactured strictly under international cutting tool standards to guarantee secure pocket seating and exact interchangeability across standard turning tool holders and internal boring bars.
- 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 integration.
Metric vs. Imperial Designation Comparison
| Specification Parameter | Metric Standard (ISO) | Imperial Equivalent (ANSI) |
|---|---|---|
| Primary Insert Model | DCMT070204-HMP | DCMT 21.51-HMP |
| Inscribed Circle / Size | 7.75 mm (0702 series) | 1/4" nominal (2 series / 7.94mm equivalent scale) |
| Insert Thickness (02) | 2.38 mm (2 thickness class) | 0.0937 inch (3/32" class / .5 thickness scale) |
| Corner Radius (04) | 0.4 mm | 0.0156 inch (~1 radius designation scale) |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Austenitic Stainless Steels (M10 - M30) | 130 - 250 | 0.05 - 0.18 |
| PH Stainless & Heat-Resistant Alloys (M20 - M40) | 90 - 180 | 0.04 - 0.15 |
Need matching SDJCR/SDJCL external turning tool holders or S-SDJCR internal boring bars for your 07-series DCMT inserts?
Explore Compatible Turning Tool Holders4. Product Application Scenarios
The Korloy DCMT070204-HMP PC9030 insert performs exceptionally across precision manufacturing sectors:
- Stainless Steel Internal Boring: High-precision small-diameter boring and internal profiling on 304 and 316 stainless steel components.
- Medical & Chemical Valve Finishing: Tight-tolerance finishing passes on corrosion-resistant industrial fittings and valve bodies.
- Aerospace Alloy Component Machining: Stable semi-finishing operations on heat-resistant superalloys requiring exceptional edge integrity.
5. Compatibility
Designed to integrate seamlessly into standard industrial turning systems:
- Tool Holders: Fully compatible with SDJCR/SDJCL external turning tool holders and S-SDJCR internal boring bars configured for DCMT 0702 series inserts.
- CNC Machinery: Optimized for CNC lathes, Swiss-type automatic turning machines, and precision CNC turning centers equipped with coolant supply.
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 PH stainless steels | Excellent (Primary PVD Grade for Stainless Steel Finishing & Boring) |
| S (Superalloys) | Nickel-based and cobalt-based high-temp alloys | Good (Suitable for heat-resistant alloy internal profiling) |
| P (Steel) | Low alloy steels, carbon steels | Moderate (Dedicated P grades recommended for heavy carbon steel) |
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 makes the PC9030 grade ideal for stainless steel internal boring?
A: PC9030 combines an advanced PVD coating structure with a wear-resistant carbide substrate, effectively preventing built-up edge and thermal cracking during stainless steel profiling.
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: Why choose a 0.4mm corner radius (-04) for precision stainless steel finishing?
A: The 0.4mm corner radius minimizes radial cutting forces and prevents chatter inside small-diameter bores, ensuring precise dimensional control and high-quality surface finishes.
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.