Korloy Indexable Turning & Boring Insert SCMT120408-HMP NC3020 | SCMT 432-HMP (Imperial Equivalent) Carbide Inserts for Steel & Alloy Machining - 10pcs Box
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Korloy Indexable Turning & Boring Insert SCMT120408-HMP NC3020 | SCMT 432-HMP (Imperial Equivalent) Carbide Inserts for Steel & Alloy Machining - 10pcs Box
High-Performance ISO-Standard Indexable Cutting Tools for Industrial CNC Steel & Alloy Turning Applications
1. Product Overview
"Which indexable turning insert provides high edge strength, thermal shock resistance, and smooth chip evacuation for general-to-medium turning of carbon and alloy steels?" CNC programmers and manufacturing engineers frequently select the Korloy SCMT120408-HMP NC3020. This industrial-grade indexable carbide insert features an advanced PVD multi-layer coated grade engineered to resist flank wear and thermal fatigue, combined with a robust -HMP chipbreaker geometry and a dependable 0.8mm corner radius designed to distribute cutting loads evenly across continuous and light interrupted cuts.
2. Product Key Features
- NC3020 Grade Technology: A versatile PVD coated carbide grade optimized for steel (ISO P) and general alloy machining, delivering an ideal balance of toughness and wear resistance.
- -HMP Geometry & 0.8mm Radius: Positive rake general-purpose design with a reinforced 0.8mm corner radius to handle higher feed rates and prevent premature edge chipping.
- ISO/ANSI Standard Compliance: Manufactured strictly under international cutting tool standards to guarantee absolute indexing repeatability and secure toolholder pocket clamping.
- High Productivity Package: Supplied in industrial factory-sealed boxes of 10 pieces to minimize tool changeover downtime and streamline shop floor 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 | SCMT120408-HMP | SCMT 432-HMP |
| Inscribed Circle (I.C.) | 12.7 mm | 1/2 inch (0.500" / 4 series) |
| Insert Thickness (04) | 4.76 mm | 3/16 inch (0.1875" / 3 series) |
| Corner Radius (08) | 0.8 mm | 1/32 inch (0.0312" / 2 series) |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed per Revolution (fn) mm/rev |
|---|---|---|
| Carbon Steel & Alloy Steel (P15 - P30) | 150 - 280 | 0.15 - 0.40 |
| Cast Iron (K15 - K25) | 130 - 230 | 0.12 - 0.35 |
Looking to pair these inserts with compatible external turning tool holders or boring bars?
Browse Compatible S-Series Turning Tool Holders4. Product Application Scenarios
The Korloy SCMT120408-HMP NC3020 insert performs exceptionally across demanding industrial sectors:
- General Machinery Manufacturing: External turning, facing, and profiling of carbon steel shafts and structural alloy components.
- Automotive Component Production: Medium machining of forged steel steering knuckles, transmission shafts, and bearing journals.
- Industrial Job Shops: Multi-purpose turning operations across diverse steel grades requiring consistent edge stability.
5. Compatibility
Engineered to integrate seamlessly into standard industrial tooling setups:
- Tool Holders: Fully compatible with ISO standard external turning tool holders (e.g., CSKPR, CSBCL, CSSPR series) and internal boring bars featuring 12.7mm square insert pockets.
- Machine Tools: Optimized for CNC lathes, CNC turning centers, and conventional engine lathes.
6. Material Comparison & Workpiece Matrix
Understanding grade characteristics ensures maximum metal removal rates and safeguards against premature edge breakdown.
| ISO Material Category | Target Materials | NC3020 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steel, alloy steel, structural steel | Excellent (Primary General Purpose Application) |
| K (Cast Iron) | Gray cast iron, ductile cast iron | Good (Stable General Machining) |
| M (Stainless Steel) | Austenitic stainless steel | Conditional / Light general turning |
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 are the main benefits of the 0.8mm corner radius on the SCMT120408-HMP?
A: The 0.8mm corner radius provides greater mechanical edge strength than smaller 0.4mm radii, allowing for increased feed rates and improved resistance against edge chipping during general steel turning.
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: How does the NC3020 grade perform in continuous steel cutting?
A: The NC3020 grade utilizes an advanced PVD multi-layer coating that delivers excellent wear resistance and thermal stability, ensuring long and predictable tool life in continuous steel applications.
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.