Korloy Indexable U-Drill & Milling Insert SPMT040204-PD PC3500 | SPMT 1.5-1-1.25 (Imperial Equivalent) Carbide Inserts for Steel & Cast Iron Machining - 10pcs Box
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Korloy Indexable U-Drill & Milling Insert SPMT040204-PD PC3500 | SPMT 1.5-1-1.25 (Imperial Equivalent) Carbide Inserts for Steel & Cast Iron Machining - 10pcs Box
High-Performance ISO-Standard Indexable Cutting Tools for Industrial CNC Steel & Cast Iron Applications
1. Product Overview
"Which indexable U-drill insert or milling insert provides exceptional wear resistance and thermal stability when machining small-diameter carbon steel and alloy steel at high feed rates?" CNC programmers and manufacturing engineers frequently select the Korloy SPMT040204-PD PC3500. This industrial-grade indexable carbide insert features an advanced PVD-coated carbide grade designed specifically to resist flank wear and chipping, paired with a specialized -PD chipbreaker geometry that ensures smooth chip evacuation during aggressive indexable drilling and milling operations.
2. Product Key Features
- PC3500 Grade Technology: A high-performance PVD multi-layer coated grade optimized for general steel (ISO P) and cast iron (ISO K), providing superior toughness and edge security.
- -PD Geometry Chipbreaker: Positive rake angle design engineered to lower cutting resistance, suppress vibration, and prevent built-up edge formation.
- ISO/ANSI Standard Compliance: Manufactured strictly under international cutting tool standards to guarantee absolute indexing repeatability and secure pocket clamping.
- High Productivity Package: Supplied in industrial factory-sealed boxes of 10 pieces to minimize tool changeover downtime and streamline shop inventory.
3. Technical Specifications & Model Breakdown
Review the comprehensive parameter specifications, metric-to-imperial conversions, and ISO model code breakdown below for seamless integration into your CNC machining environment.
Metric vs. Imperial Designation Comparison
| Specification Parameter | Metric Standard (ISO) | Imperial Equivalent (ANSI) |
|---|---|---|
| Primary Insert Model | SPMT040204-PD | SPMT 1.5-1-1.25 |
| Inscribed Circle (I.C.) | 4.0 mm | 0.157 inch (~1.5 series) |
| Insert Thickness (02) | 2.38 mm | 3/32 inch (0.0937" / 1.25 series) |
| Corner Radius | 0.4 mm | 0.016 inch |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed per Revolution (fn) mm/rev |
|---|---|---|
| Carbon Steel / Alloy Steel (P10 - P30) | 150 - 270 | 0.03 - 0.10 |
| Gray Cast Iron / Ductile Iron (K10 - K30) | 130 - 230 | 0.03 - 0.10 |
| Stainless Steel (M10 - M20) | 100 - 170 | 0.02 - 0.08 |
Looking for matching indexable U-drills or milling tool holders to fit these inserts?
Browse Compatible Indexable U-Drills & Cutter Bodies4. Product Application Scenarios
The Korloy SPMT040204-PD PC3500 insert performs exceptionally across demanding industrial sectors:
- Automotive Powertrain Production: Small-diameter hole drilling and face milling operations on cast iron components and forged steel shafts.
- Precision General Machinery: Micro-boring and contouring on carbon steel structural parts and mechanical fittings.
- Mold & Die Fabrication: Miniature pocketing and precision roughing on pre-hardened alloy steel blocks.
5. Compatibility
Engineered to integrate seamlessly into standard industrial tooling setups:
- Tool Bodies: Fully compatible with small-diameter indexable U-drills and miniature 90-degree shoulder milling cutters utilizing SPMT 0402 insert pockets.
- Machine Tools: Optimized for Swiss-type automatic lathes, high-precision CNC lathes, and vertical machining centers (VMCs).
6. Material Comparison & Workpiece Matrix
Understanding grade characteristics ensures maximum metal removal rates and safeguards against premature edge breakdown.
| ISO Material Category | Target Materials | PC3500 Performance Suitability |
|---|---|---|
| P (Steel) | Low carbon steel, alloy steel, structural steel | Excellent (Primary Application - High Wear Resistance) |
| K (Cast Iron) | Gray cast iron (FC), ductile cast iron (FCD) | Very Good (Stable Intermittent Cutting) |
| M (Stainless Steel) | Austenitic and ferritic stainless steel | Conditional / Moderate cutting speeds |
7. Why Choose Us
100% Genuine Guarantee
Sourced directly from authorized manufacturers, guaranteeing verified batch authenticity and consistent industrial tool performance.
Fast Global Logistics
Maintained warehouse inventory and optimized international shipping lines ensure rapid dispatch to eliminate production line bottlenecks.
Technical Expertise
Backed by professional CNC application engineers available to provide customized cutting data recommendations and troubleshooting.
8. Frequently Asked Questions (FAQ)
Q: What makes the Korloy PC3500 grade ideal for steel and cast iron U-drilling?
A: The PC3500 grade features a robust PVD nano-structured coating combined with a high-strength carbide substrate, providing exceptional wear resistance and thermal stability during high-speed steel drilling and milling.
Q: How many inserts are included in each factory package?
A: Each standard industrial box contains 10 factory-sealed indexable carbide inserts, individually protected against shipping shock and environmental contamination.
Q: Can the SPMT040204-PD insert be used in micro U-drill bodies?
A: Yes, the 0402 size features a 4.0mm inscribed circle and a 2.38mm thickness, making it ideal for compact, small-diameter indexable U-drills and miniature boring tools requiring high positional stability.
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.