Korloy SPMT050204-PD PC3500 Indexable U-Drill & Milling Insert (10pcs)
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The Original Korloy SPMT050204-PD PC3500 is a high-performance Square Indexable Insert designed for Indexable U-Drills and precision milling applications. The PC3500 Grade features an advanced CVD coating specifically optimized for Steel (P-Group) materials. With its robust 0.4mm corner radius and "PD" chipbreaker, it excels in managing high-temperature chips during continuous drilling, ensuring stable tool life and high-speed productivity.
CVD Performance: PC3500 is engineered for speed. Its multi-layer CVD coating provides superior crater wear resistance, making it the perfect choice for the outer pocket of indexable drills where cutting speeds are at their highest.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | SPMT050204-PD |
| Corner Radius (r) | 0.4 mm |
| Grade | PC3500 (CVD Coated for Steel) |
| Cutting Edges | 4 Edges |
Core Performance Benefits:
- High Wear Resistance: The thick CVD coating (TiCN+Al2O3+TiN) acts as a thermal shield, extending tool life during high-speed continuous drilling.
- Optimized Chip Control: The PD geometry is specifically designed to curl and break chips in the deep flutes of U-drills, preventing chip clogging.
- Edge Stability: The 050204 size provides increased cross-sectional strength for drilling larger diameter holes (typically 15mm-20mm).
- Versatile Milling: Can also be used in small-diameter face mills and shoulder milling cutters for general steel processing.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn/fz) |
|---|---|---|
| Low Carbon Steel | 160 - 300 m/min | 0.06 - 0.14 mm/rev |
| Alloy Steel (4140/SCM440) | 130 - 240 m/min | 0.05 - 0.12 mm/rev |
| Cast Iron (GG25) | 100 - 200 m/min | 0.07 - 0.15 mm/rev |
Compatible Tooling Systems:
This insert is precision-matched for the following tool holders:
- Indexable U-Drills: King Drill (15mm - 21mm range)
- End Mills for SPMT: SPMT Series Indexable Milling Cutters
Machinist Tip: Why PC3500 for Drilling?
Understanding the difference between CVD and PVD for SPMT inserts:
CVD Grade. Best for high Vc (Surface Speed). It excels in dry or high-heat steel drilling. Its thick coating provides the highest resistance to thermal wear on the outer edge of the drill.
PVD Grade. Better for tougher, gummy materials like stainless steel or when cutting speeds are lower. It is more resistant to chipping but less resistant to crater wear than PC3500.
Pro Advice: For maximum drill life in steel, use PC3500 as your outer insert and PC5300 (if available) as your inner insert. This setup balances the speed-wear on the outside with the impact-wear on the inside.
Packaging: 10 pieces per box.
Korloy SPMT050204-PD technical data, SPMT 050204 steel drilling insert, PC3500 grade for high speed milling, U-drill outboard insert for alloy steel, SPMT050204-PD vs PC5300
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.