Korloy SPMT130410-PD PC3500 Extra Large U-Drill & Milling Insert (10pcs)
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The Original Korloy SPMT130410-PD PC3500 is the powerhouse of the Square Indexable Insert family, specifically designed for large-capacity Indexable U-Drills and heavy-duty face milling cutters. The PC3500 Grade is Korloy's premier CVD-coated carbide solution for Heavy-Duty Steel (P-Group) Machining. With a massive 1.0mm corner radius and reinforced "PD" chipbreaker, this insert is built to conquer the highest cutting forces in large-scale industrial manufacturing.
Built for the Big Jobs: When drilling holes exceeding 45mm in diameter, heat and torque are extreme. The SPMT13 size provides the necessary physical mass to dissipate heat, while the PC3500 CVD coating ensures the cutting edge remains stable at high surface speeds.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SPMT130410-PD |
| Corner Radius (r) | 1.0 mm (Maximum Strength) |
| Thickness | 4.76 mm |
| Grade | PC3500 (Advanced CVD Steel Grade) |
Core Performance Benefits:
- Maximum Edge Toughness: The 1.0mm radius (R10) provides a massive cutting edge that resists chipping even under heavy intermittent loads.
- CVD Thermal Shield: Multi-layer coating technology allows for high-speed operation in carbon and alloy steels without rapid crater wear.
- Superior Chip Breaking: The PD geometry is optimized for the thick, heavy chips generated by 13mm inserts, ensuring they don't clog the large flutes of 50mm+ drills.
- Extreme Stability: The increased thickness (4.76mm) prevents insert fracturing during deep-hole drilling in tough forgings and castings.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn/fz) |
|---|---|---|
| Low Carbon/Mild Steel | 160 - 280 m/min | 0.10 - 0.25 mm/rev |
| Alloy Steel (4140/SCM440) | 120 - 220 m/min | 0.08 - 0.20 mm/rev |
| Cast Steel / Heavy Forgings | 80 - 160 m/min | 0.08 - 0.18 mm/rev |
Compatible Heavy-Duty Systems:
Precision-matched for large-scale tooling:
- Large Indexable Drills: King Drill (45mm - 60mm range)
- Heavy Face Mills: Large Diameter Indexable Cutters for SPMT13
Machinist Tip: Dominating Large Hole Drilling
Optimizing the SPMT130410 PC3500 for maximum performance:
The Outer Edge Hero. On a 50mm drill, the outer insert experiences intense speed. Using a CVD grade like PC3500 is non-negotiable here; PVD grades will soften and fail prematurely under this thermal load.
Structural Strength. The 1.0mm radius isn't just for finish; it provides a much larger cross-section at the corner, which is where the highest axial and radial pressures converge during heavy drilling.
Pro Advice: Large U-drills require immense coolant volume. Ensure your machine can deliver high-pressure flow through the tool to keep the SPMT13 inserts cool and, more importantly, to eject the massive chips produced at 0.20mm+ feeds.
Packaging: 10 pieces per box.
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