Korloy SPMT090308-PD PC5300 Universal PVD Insert for U-Drill & Milling (10pcs)
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The Original Korloy SPMT090308-PD PC5300 is a heavy-duty Universal Square Indexable Insert, precision-engineered for large-diameter Indexable U-Drills and robust face milling cutters. Featuring Korloy's flagship PC5300 PVD Grade, this insert combines an ultra-tough carbide substrate with a heat-resistant PVD coating. It is the premier choice for Stainless Steel (M-Group) and (Exotic Alloys), offering the edge toughness required for deep hole drilling in demanding environments.
The Problem Solver: When using large U-drills (34mm-42mm), the center insert is subjected to intense axial pressure at low speeds. PC5300’s extreme impact resistance makes it the ideal inner insert to prevent the edge-chipping commonly seen with brittle CVD grades.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | SPMT090308-PD |
| Corner Radius (r) | 0.8 mm |
| Grade | PC5300 (Premium Universal PVD) |
| Thickness | 3.18 mm |
Core Performance Benefits:
- Shock Resistance: Fine-grained carbide substrate provides excellent resistance against sudden impacts during hole entry.
- Versatile Performance: Capable of machining Stainless Steel, Carbon Steel, and Heat-Resistant Alloys with a single insert grade.
- Reinforced Radius: The 0.8mm corner radius (R8) is designed to handle the high radial forces found in large-diameter drilling and rough milling.
- Stable Edge Life: The advanced PVD coating prevents Built-Up Edge (BUE) when machining "gummy" materials like 304 stainless steel.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn/fz) |
|---|---|---|
| Stainless Steel (304/316) | 60 - 130 m/min | 0.08 - 0.18 mm/rev |
| Alloy Steel (HB180-280) | 90 - 180 m/min | 0.10 - 0.20 mm/rev |
| Ductile Cast Iron | 70 - 150 m/min | 0.12 - 0.22 mm/rev |
Compatible Tooling Systems:
Maximize rigidity with these professional-grade holders:
- Large Indexable Drills: King Drill (34mm - 42mm Diameter Range)
- Heavy-Duty Milling: SPMT 09-type Face Mills & Roughing End Mills
Machinist Tip: The "Fail-Safe" Grade for Big Holes
Why PC5300 is essential for large SPMT09 applications:
The Inner Edge Hero. In large U-drills, the center insert doesn't "cut"—it pushes. PC5300's high toughness is designed to handle this crushing action without fracturing. Always use PC5300 for the inner pocket of your drill.
The Outer Edge Hero. For high-volume steel drilling, pair your inner PC5300 with an outer PC3500. This combo gives you the toughness in the center and heat resistance at the periphery.
Pro Advice: When drilling Stainless Steel, use PC5300 for BOTH pockets. Due to the high torque of a 40mm drill, ensure your machine spindle is locked and use through-spindle coolant to maintain consistent edge temperature.
Packaging: 10 pieces per box.
Korloy SPMT090308-PD PC5300 tech specs, best insert for drilling 316 stainless large holes, SPMT 090308 PVD vs CVD tool life, 40mm U-drill inner pocket insert, Korloy PC5300 grade for nickel-based alloys
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.