Korloy Indexable Turning & Boring Insert SCMT09T304-HMP NC3030 | SCMT 321-HMP (Imperial Equivalent) Carbide Inserts for Steel & Alloy Machining - 10pcs Box
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Korloy Indexable Turning & Boring Insert SCMT09T304-HMP NC3030 | SCMT 321-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 toughness, excellent wear resistance, and precise surface finish capability for fine finishing and semi-finishing of carbon and alloy steels?" CNC programmers and manufacturing engineers frequently select the Korloy SCMT09T304-HMP NC3030. This industrial-grade indexable carbide insert features a versatile PVD multi-layer coated grade engineered to resist flank wear and thermal fatigue, combined with a robust -HMP chipbreaker geometry and a sharp 0.4mm corner radius designed to achieve exceptional surface finishes and precise dimensional control during continuous and light interrupted cuts.
2. Product Key Features
- NC3030 Grade Technology: A reliable PVD coated carbide grade optimized for steel (ISO P) and general alloy machining, delivering high fracture toughness and predictable tool life.
- -HMP Geometry & 0.4mm Radius: Precision-focused positive rake design with a fine 0.4mm corner radius to achieve superior surface textures and minimize cutting forces.
- 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 | SCMT09T304-HMP | SCMT 321-HMP |
| Inscribed Circle (I.C.) / Size | 9.525 mm (09) | 3/8 inch (3 series) |
| Insert Thickness (T3) | 3.97 mm | 11/64 inch (2 series) |
| Corner Radius (04) | 0.4 mm | 1/64 inch (1 series / 0.0156") |
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) | 140 - 260 | 0.10 - 0.28 |
| Cast Iron (K15 - K25) | 120 - 220 | 0.08 - 0.25 |
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 SCMT09T304-HMP NC3030 insert performs exceptionally across demanding industrial sectors:
- General Machinery Manufacturing: Precision finishing and facing of carbon steel shafts, collars, and structural alloy components.
- Automotive Component Production: Fine turning of forged steel transmission parts, spindles, and steering shafts.
- Industrial Job Shops: High-accuracy finishing operations across diverse steel grades requiring consistent edge sharpness.
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 9.525mm square insert pockets.
- Machine Tools: Optimized for CNC lathes, CNC turning centers, and high-precision conventional 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 | NC3030 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steel, alloy steel, free-machining steel | Excellent (Primary Finishing Application) |
| K (Cast Iron) | Gray cast iron, ductile cast iron | Good (Stable Finishing Passes) |
| M (Stainless Steel) | Ferritic and martensitic 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 0.4mm corner radius on the SCMT09T304-HMP?
A: The 0.4mm corner radius provides a sharper edge profile that reduces cutting resistance and ensures exceptional surface finish quality during fine steel turning operations.
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 NC3030 grade perform in steel machining?
A: The NC3030 grade utilizes a tough carbide substrate with a robust PVD coating that provides high resistance to thermal and mechanical wear, ensuring dependable tool life in continuous steel cutting.
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.