Korloy WCMT040208-C20N PC5335 Indexable U-Drill Insert for Steel & Stainless (10pcs)
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The Original Korloy WCMT040208-C20N PC5335 (ANSI: WCMT 2.522) is a rugged Indexable Drill Insert specifically crafted for Medium-Diameter Shallow Hole Machining (U-Drills). Engineered with the PC5335 PVD Grade, this insert is the industry standard for shops requiring a balance of toughness and heat resistance. The C20N Chipbreaker ensures precision chip control, breaking ductile steel and stainless steel chips into small, manageable fragments for efficient evacuation.
Designed for Stability: The WCMT 04 series is built to handle higher feed rates and larger drilling depths. The PC5335 grade features an ultra-fine substrate that absorbs the mechanical shocks of high-speed drilling, making it exceptionally reliable in long-run production cycles.
Technical Specifications (Metric & ANSI):
| ISO Designation | WCMT 040208-C20N |
| ANSI Designation | WCMT 2.522 |
| Thickness (S) | 2.38 mm |
| Corner Radius (r) | 0.8 mm |
| Grade | PC5335 (High-Performance PVD) |
| Target Materials | Steel (P), Stainless Steel (M), Cast Iron (K) |
Core Performance Benefits:
- Dual-Material Specialist: Optimized for both Steel and Stainless Steel, reducing the need for tool changes when switching workpieces.
- Enhanced C20N Geometry: The optimized chip-groove design facilitates rapid chip breaking, significantly reducing the torque required by the spindle.
- Superior PVD Coating Adhesion: The PC5335 grade utilizes advanced coating technology to prevent peeling, even when exposed to high-pressure coolant and varying temperatures.
- Economic 3-Edge Design: Trigon (W-style) geometry provides three precision cutting edges, maximizing cost-effectiveness for shallow hole operations.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Alloy Steel (4140/4340) | 100 - 180 m/min | 0.07 - 0.16 mm/rev |
| Stainless Steel (316L) | 90 - 160 m/min | 0.06 - 0.14 mm/rev |
The Korloy Advantage: Drill Performance
As an outer insert, WCMT 04 must withstand the highest surface speeds. PC5335 is engineered to resist the crater wear that typically limits tool life in these positions.
Ensure the U-drill's chip flutes are clear of obstruction. The C20N breaker works best when combined with high-flow internal lubrication to "propel" chips out of the borehole.
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.