Korloy WCMT080408-C20N PC5335 Extra Heavy-Duty U-Drill Insert (10pcs)
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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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