Korloy SPMT15M510-PD PC3500 Ultra-Heavy Duty U-Drill Insert (10pcs)
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The Original Korloy SPMT15M510-PD PC3500 is the "King of Power" in the Square Indexable Insert lineup. Specifically engineered for Ultra-Large Indexable Drills and heavy-duty milling cutters, this 15mm insert is designed to tackle the most demanding metal removal tasks. The PC3500 Grade, featuring Korloy's advanced multi-layer CVD coating, provides the extreme heat resistance and edge stability needed for High-Speed Steel (P-Group) Machining in heavy industrial sectors.
Maximum Metal Removal: For drilling operations exceeding 60mm in diameter, standard inserts simply can't handle the heat. The SPMT15M5 series offers massive cross-sectional strength, ensuring that even under extreme torque, the cutting edge remains precise and productive.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | SPMT15M510-PD |
| Corner Radius (r) | 1.0 mm (Extreme Strength) |
| Thickness | 5.56 mm (Ultra-Thick) |
| Grade | PC3500 (CVD Multi-Layer for Steel) |
Core Performance Benefits:
- Unmatched Edge Rigidity: The M5 (5.56mm) thickness prevents fracturing under the immense axial forces of large-diameter drilling.
- Red Hardness: The CVD Al2O3 layer maintains high hardness even at 1000°C+, preventing deformation at high surface speeds.
- Heavy-Duty PD Chipbreaker: Specifically designed to handle the wide and thick chips produced by 15mm inserts, ensuring efficient evacuation.
- Superior Wear Resistance: Ideal for machining abrasive materials like cast steel and forged alloy steels used in the energy and mining sectors.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn/fz) |
|---|---|---|
| Carbon/Structural Steel | 150 - 280 m/min | 0.12 - 0.28 mm/rev |
| Alloy Steel (4140/SCM440) | 110 - 210 m/min | 0.10 - 0.22 mm/rev |
| Heavy Steel Forgings | 80 - 150 m/min | 0.08 - 0.18 mm/rev |
Compatible Heavy-Duty Systems:
Due to its size, this insert requires high-torque tool bodies:
- Extra-Large U-Drills: King Drill (60mm - 80mm+ Diameter)
- Heavy Facing Mills: Modular Face Milling Heads for SPMT15
Machinist Tip: The Giant of Hole Making
Optimizing the SPMT15M510 for ultra-heavy cycles:
High Vc Protection. On large drills, the outer diameter travels at significant speeds. PC3500's CVD coating is essential to prevent the "burn-out" that happens to PVD grades when they reach these critical temperatures.
Zero Deflection. The 5.56mm thickness is designed for high-horsepower machines. It provides the mechanical strength needed to hold the drill straight and true in deep 3D or 4D hole applications.
Pro Advice: For 80mm holes, coolant pressure is no longer just for cooling—it's for chip management. Ensure your pump can handle high volume to flush out the substantial chips that a 15mm insert produces at 0.25mm/rev.
Packaging: 10 pieces per box.
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