Korloy SPMT090308-PD PC3500 Heavy-Duty Square U-Drill Insert (10pcs)
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The Original Korloy SPMT090308-PD PC3500 is a high-strength Square Indexable Insert designed for heavy-duty Indexable U-Drills and large-scale milling operations. The PC3500 Grade is a premier CVD-coated carbide solution specifically engineered for the High-Efficiency Machining of Steel (P-Group). With a robust 0.8mm corner radius and an optimized "PD" chipbreaker, this insert delivers maximum stability and heat resistance when drilling large-diameter holes in tough alloy and structural steels.
Maximum Metal Removal: The SPMT09 size is built for power. Combined with the PC3500 CVD technology, it provides a formidable thermal barrier, allowing for higher cutting speeds (Vc) and prolonged tool life in aggressive steel drilling cycles.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | SPMT090308-PD |
| Corner Radius (r) | 0.8 mm (Heavy Duty) |
| Grade | PC3500 (CVD Multi-Layer Coating) |
| Application | Large Hole Drilling, Rough Face Milling |
Core Performance Benefits:
- Extreme Heat Resistance: The multi-layer CVD coating (TiCN+Al2O3+TiN) is designed to withstand the intense friction heat of high-speed steel drilling.
- Stable Edge Geometry: The 0.8mm radius offers superior edge toughness, minimizing the risk of chipping during entrance and exit of the cut.
- PD Chipbreaker Technology: Engineered to force thick steel chips into compact curls, ensuring smooth evacuation from deep drill flutes.
- High Productivity: Optimized for high surface speeds (Vc), allowing for shorter cycle times in large-scale manufacturing.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn/fz) |
|---|---|---|
| Low Carbon Steel (1018/1045) | 180 - 320 m/min | 0.08 - 0.20 mm/rev |
| Alloy Steel (4140/SCM440) | 140 - 260 m/min | 0.07 - 0.18 mm/rev |
| Pre-Hardened Steel (H13/P20) | 90 - 180 m/min | 0.06 - 0.14 mm/rev |
Compatible Tooling Systems:
Ensure maximum rigidity by using these professional-grade holders:
- Heavy-Duty U-Drills: King Drill (34mm - 42mm range)
- Indexable Milling Cutters: Large Diameter Face Mills for SPMT09
Machinist Tip: Scaling Up to SPMT09
Why the SPMT090308 PC3500 is the choice for heavy industry:
CVD vs. PVD. In large-diameter drilling, the center of the drill moves slowly while the outer edge moves very fast. PC3500's thick CVD coating is essential for the outer edge to survive the extreme surface speeds without burning out.
Structural Integrity. With larger hole sizes comes greater torque. The R0.8 radius provides the necessary strength to the insert tip to withstand the high radial forces without vibrating or fracturing.
Pro Advice: For U-drills over 35mm, machine stability is key. If you experience "howling" or chatter, check your spindle rigidity and ensure your internal coolant pressure is at maximum to flush those large chips.
Packaging: 10 pieces per box.
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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.