Korloy SPMT040204-PD PC5300 Universal PVD Insert for U-Drill & Milling (10pcs)
30-Day Free Returns
Free Worldwide Shipping
The Original Korloy SPMT040204-PD PC5300 is a high-performance Universal Square Indexable Insert designed for Indexable U-Drills and precision milling. The PC5300 Grade is legendary for its versatility, featuring a fine-grained substrate and an advanced PVD coating. This insert excels where others fail: in Stainless Steel (M-Group), Heat-Resistant Alloys (S-Group), and in applications where machining stability is less than ideal.
The Toughness Champion: PC5300 is the "go-to" grade for the inner pocket of U-drills. Because the center of the drill has zero surface speed, the material is often pushed rather than cut. PC5300’s extreme toughness prevents the chipping that often occurs in these high-impact conditions.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | SPMT040204-PD |
| Corner Radius (r) | 0.4 mm |
| Grade | PC5300 (Premium Universal PVD) |
| Coating Type | PVD (TiAlN Based) |
Core Performance Benefits:
- Multi-Material Mastery: Perfect for switching between Stainless, Carbon Steel, and Exotic Alloys without changing inserts.
- Anti-Chipping Technology: Superior PVD coating adhesion prevents delamination even under the high thermal shocks of wet machining.
- PD Chipbreaker: Optimizes chip formation in the confined flutes of small-diameter drills, ensuring consistent evacuation.
- Ideal Inner-Edge Insert: Handles the difficult "zero-speed" cutting at the center of indexable drills with ease.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn/fz) |
|---|---|---|
| Stainless Steel (304/316) | 80 - 160 m/min | 0.04 - 0.10 mm/rev |
| Alloy/Carbon Steel | 100 - 200 m/min | 0.05 - 0.12 mm/rev |
| High-Temp Alloys | 25 - 60 m/min | 0.03 - 0.08 mm/rev |
Compatible Tooling Systems:
Pairs perfectly with 04-pocket indexable drills:
- King Drill Series: Diameter 12mm - 14mm Range
- Indexable End Mills: SPMT 04-type Milling Cutters
Machinist Tip: PC5300 vs PC3500
Why the grade choice matters for your U-Drill:
The Impact Stopper. Because it's a PVD grade, it has a sharper edge and higher toughness. Use this for 100% of the inserts when drilling Stainless Steel, OR as the inner insert for all materials to prevent breakage.
The Heat Resister. Use this primarily for the outer insert when drilling high volumes of Carbon or Alloy Steel. It handles speed better but lacks the impact resistance of PC5300.
Pro Advice: If you are experiencing "mysterious" insert failure on your U-drill, switch both inserts to PC5300. It is the most reliable "fail-safe" grade in the Korloy lineup.
Packaging: 10 pieces per box.
Korloy SPMT040204-PD PC5300 cutting data, best insert for stainless steel U-drill, SPMT 040204 PVD vs CVD, indexable drill insert for unstable machining, Korloy PC5300 grade for heat resistant alloys