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
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.