Korloy SPMT07T208-PD PC5300 Universal PVD Insert for Stainless Steel (10pcs)
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The Original Korloy SPMT07T208-PD PC5300 is a high-performance Universal Square Indexable Insert, precision-engineered for medium-to-large Indexable U-Drills and heavy milling cutters. Featuring Korloy's advanced PC5300 PVD Grade, this insert combines a high-toughness carbide substrate with a specialized TiAlN-based coating. It is the definitive solution for Stainless Steel (M-Group) and Heat-Resistant Alloys (S-Group), providing exceptional reliability where edge strength is the top priority.
The Impact Specialist: In indexable drilling, the inner insert must withstand heavy crushing forces due to low cutting speeds near the center. PC5300’s extreme toughness makes it the perfect inner insert to prevent the chipping and sudden fractures that often plague standard CVD grades.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | SPMT07T208-PD |
| Corner Radius (r) | 0.8 mm (High Strength) |
| Grade | PC5300 (Premium Universal PVD) |
| Target Materials | Stainless Steel, Alloy Steel, Cast Iron, Titanium |
Core Performance Benefits:
- Extreme Toughness: PVD coating provides a sharper and more impact-resistant edge than CVD, essential for interrupted cuts and center drilling.
- Versatile Application: One grade handles Stainless, Steel, and Cast Iron, simplifying tool management and reducing inventory.
- Reduced Tool Pressure: The sharp "PD" chipbreaker geometry lowers axial forces, which is critical for maintaining hole straightness in deep-hole drilling.
- Heat Resistance: The TiAlN coating effectively prevents Built-Up Edge (BUE) in gummy materials like 316 Stainless Steel.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn/fz) |
|---|---|---|
| Stainless Steel (304/316) | 60 - 130 m/min | 0.07 - 0.16 mm/rev |
| Alloy Steel (HB180-280) | 90 - 180 m/min | 0.08 - 0.18 mm/rev |
| Inconel / Titanium | 20 - 50 m/min | 0.05 - 0.12 mm/rev |
Compatible Tooling Systems:
Precision-matched for the following high-performance tools:
- King Drill Series: Diameter 27.5mm - 33.5mm Range
- Indexable Milling Cutters: SPMT 07T2 Face Mills & End Mills
Machinist Tip: Scaling Up Your Drilling Stability
Why PC5300 is the secret to longer tool life in SPMT07 pockets:
Best for Inner Pockets. At the center of a 30mm drill, speed is zero. PVD grades have higher edge toughness to "push" through the material without fracturing. Essential for Stainless Steel.
Best for Steel Outer Pockets. Use this on the outer edge when drilling Carbon Steel at high RPM to withstand the extreme heat generated by the peripheral speed.
Pro Advice: If you're drilling 316 Stainless Steel, use PC5300 for BOTH the inner and outer pockets. Ensure your coolant pressure is at least 20 bar to prevent the gummy chips from re-cutting and damaging the insert edges.
Packaging: 10 pieces per box.
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