Korloy WCMT080408-C20N PC5335 Extra Heavy-Duty U-Drill Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy WCMT080408-C20N PC5335 (ANSI: WCMT 432) is the absolute powerhouse of the Indexable Drill series. Specifically designed for Ultra-Large Diameter Shallow Hole Machining, the 08-size insert features a reinforced 4.76mm thickness. This is the ultimate tool for heavy-duty manufacturing in the energy, marine, and defense sectors, where drilling massive holes in tough materials like 4140 steel or 316L stainless requires maximum edge stability. The PC5335 PVD Grade provides the essential toughness to prevent fracture under the extreme torques of large-diameter drilling.
Heavy Industrial Standard: At the 08 size, cutting forces are immense. The PC5335's advanced PVD coating acts as a shield against intense friction and heat, while the extra-thick carbide substrate ensures the insert won't crack during high-feed breakthroughs in thick-walled workpieces.
Technical Specifications (Metric & ANSI):
| ISO Designation | WCMT 080408-C20N |
| ANSI Designation | WCMT 432 |
| Thickness (S) | 4.76 mm |
| Corner Radius (r) | 0.8 mm |
| Grade | PC5335 (Extreme Toughness PVD) |
| Target Diameter | D50mm - D80mm+ U-Drills |
Core Performance Benefits:
- Maximum Structural Rigidity: The 4.76mm thickness is the thickest in the WCMT series, specifically built to handle the mechanical shocks of large-hole drilling.
- Optimized C20N Geometry: Designed to break very thick chips into small "C" shapes, ensuring they don't jam in the large flutes of big U-drills.
- Versatile PC5335 Grade: Excels in both Carbon Steel (P) and Stainless Steel (M), reducing downtime for insert changes in multi-material shops.
- Three Precision Edges: The Trigon geometry offers three usable edges, making it a highly economical choice for large-diameter drilling compared to solid tools.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon & Alloy Steels | 100 - 180 m/min | 0.10 - 0.22 mm/rev |
| 300 Series Stainless | 80 - 150 m/min | 0.08 - 0.18 mm/rev |
Pro Tip: Dominating Extra Large Boreholes
Large U-drills are "spindle killers." Ensure your machine tool has the horsepower and low-end torque to pull a D60 or D80 drill. A weak spindle will cause the insert to chatter and fail prematurely.
When drilling deep with WCMT 08, chips are very thick. Use maximum coolant flow to push chips out of the borehole. If you hear a "crunching" sound, stop immediately—chips are re-cutting.
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.