Korloy SPMT060205-PD PC3500 Square U-Drill & Milling Insert (10pcs)
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The Original Korloy SPMT060205-PD PC3500 is a robust Square Indexable Insert designed for heavy-duty Indexable U-Drills and high-feed milling cutters. The PC3500 Grade features a specialized thick CVD coating that excels in the High-Speed Machining of Steel (P-Group). With a precision-engineered 0.5mm corner radius and the "PD" chipbreaker, this insert provides the perfect balance of edge strength and smooth chip evacuation for large-diameter hole making.
Engineered for Productivity: PC3500 is the industry standard for steel drilling. Its multi-layer CVD coating (TiCN+Al2O3+TiN) acts as a high-performance thermal barrier, allowing for increased spindle speeds without rapid crater wear.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | SPMT060205-PD |
| Corner Radius (r) | 0.5 mm |
| Grade | PC3500 (CVD Coated for Steel) |
| Coating | CVD (Thick-film Technology) |
Core Performance Benefits:
- Maximum Speed: The CVD grade thrives at high peripheral speeds, making it ideal for the outboard pocket of U-drills.
- Enhanced Chip Control: The PD chipbreaker curls chips into tight spirals, preventing "chip packing" in the drill flutes.
- Edge Durability: The 0.5mm radius is reinforced to handle the high axial forces found in drilling deep holes in alloy steel.
- Universal Versatility: While primarily for drilling, it is equally effective in indexable end mills for steel facing and shoulder work.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn/fz) |
|---|---|---|
| Carbon Steel (Soft) | 180 - 320 m/min | 0.07 - 0.16 mm/rev |
| Alloy Steel (4140/SCM440) | 140 - 260 m/min | 0.06 - 0.14 mm/rev |
| Die/Tool Steel | 90 - 180 m/min | 0.05 - 0.12 mm/rev |
Compatible Tooling Systems:
Maximize performance by using these professional-grade holders:
- Indexable U-Drills: King Drill (21.5mm - 27mm range)
- Indexable Milling Cutters: SPMT Series Face Mills & End Mills
Machinist Tip: The Steel Drilling Advantage
Why choose PC3500 for your SPMT060205 inserts?
The Wear Specialist. Best for high-production steel runs. The thick CVD coating handles the extreme heat generated at the outer diameter of a U-drill, where PVD grades often fail early.
The Toughness Specialist. Better for stainless steel or interrupted milling. Use PC5300 if you see edge chipping rather than smooth wear on your PC3500 inserts.
Pro Advice: For indexable drilling, ensure internal coolant pressure is at least 15-20 bar. This is critical for PC3500 to maintain its thermal stability and flush chips out of 3D and 4D deep holes.
Packaging: 10 pieces per box.
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