Korloy VCMT160404-HMP NC3020 (ANSI VCMT 331-HMP) Indexable Carbide Turning Insert 10pcs | 5/8" IC PVD Coated Cutting Tool for Alloy Steel & Stainless Steel CNC Lathe Machining
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Korloy VCMT160404-HMP NC3020 (ANSI VCMT 331-HMP) Indexable Carbide Turning Insert 10pcs
Industrial-Grade PVD Coated Carbide Inserts (Pack of 10) for Precision Metric & Imperial CNC Lathe Steel & Stainless Steel Turning
AEO Quick Answer: The Korloy VCMT160404-HMP (ANSI: VCMT 331-HMP) NC3020 (10pcs pack) is a high-precision indexable carbide turning insert featuring a 35° rhombic geometry, 7° positive clearance, a sharp 0.4mm corner radius, and Korloy's specialized -HMP chipbreaker. Enhanced with the high-toughness NC3020 PVD grade, it excels in steel, alloy steel, and light stainless steel finishing and semi-finishing operations.
1. Product Overview
"Which indexable carbide insert and PVD grade combination offers superior edge toughness and smooth chip control for alloy steel and stainless steel turning?"
The Korloy VCMT160404-HMP (Metric) / VCMT 331-HMP (ANSI) in NC3020 grade (supplied in a 10pcs pack) is engineered for exceptional cutting performance on CNC lathes. The multi-layer PVD coated NC3020 substrate combines high fracture toughness with excellent resistance to thermal shock. The -HMP chipbreaker provides a sharp cutting edge and low cutting forces, making it ideal for precision profiling and general turning.
ISO Model Designation Breakdown (VCMT160404-HMP)
ANSI Model Designation Breakdown (VCMT 331-HMP)
Looking for matching VCMT turning tool holders for this 10pcs insert set?
2. Product Core Advantages
- Advanced NC3020 PVD Coating: Specialized PVD nano-coating structure delivering supreme fracture toughness and reliable wear resistance.
- Optimized -HMP Geometry: Sharp positive rake angle design that minimizes cutting forces and prevents built-up edge.
- 35° Rhombic V Shape: Exceptional clearance for complex profile machining and angular contouring.
- Value 10-Piece Box: Economically packaged to streamline tooling inventory management for machine shops.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Metric Specification (ISO) | Imperial Specification (ANSI) |
|---|---|---|
| Insert Model Code | VCMT160404-HMP | VCMT 331-HMP |
| Shape & Clearance Angle | VCMT (35° Rhombic, 7° Positive) | VCMT (35° Rhombic, 7° Positive) |
| Inscribed Circle (IC Size) | 16 Size (~16.0 mm length) | 3 Designation (3/8" IC) |
| Insert Thickness | 04 Code (4.76 mm) | 3 Code (3/16" thickness) |
| Corner Radius (RE) | 04 Code (0.4 mm Radius) | 1 Code (1/64" Radius) |
Recommended Cutting Parameters (Korloy NC3020) - Dual-Column Reference
| Workpiece Material Group | Cutting Speed (Vc, m/min) | Feed Rate (fn, mm/rev) & Depth (ap) |
|---|---|---|
| ISO P (Alloy & Carbon Steel) | 160 - 300 m/min | fn: 0.08 - 0.22 mm/rev | ap: 0.2 - 2.5 mm |
| ISO M (Stainless Steel) | 120 - 220 m/min | fn: 0.06 - 0.18 mm/rev | ap: 0.2 - 2.0 mm |
| ISO K (Cast Iron) | 140 - 260 m/min | fn: 0.07 - 0.20 mm/rev | ap: 0.3 - 2.5 mm |
4. Product Applications
- Alloy Steel & Carbon Steel Turning: Delivers clean surface finishes and stable performance in precision parts manufacturing.
- Stainless Steel Finishing: PVD coating structure resists chemical wear and edge buildup when turning austenitic and martensitic stainless steels.
- Complex Profiling: 35° rhombic shape provides superior clearance for internal and external copying operations.
5. Compatibility & Accessories
Tool Holder Compatibility: Fully compatible with ISO and ANSI standard SVJBR / SVJBL turning tool holders and boring bars configured for VCMT 1604 / VCMT 33 inserts.
Machine Systems: Designed for CNC turning centers, lathes, and Swiss-type automatic machines.
Hardware: Requires standard clamping screws and matching seat pockets.
6. Material Comparison: NC3020 PVD Grade vs. CVD Grades
Coating Technology: NC3020 uses a fine-grained PVD coating that maintains a sharper cutting edge and higher fracture toughness compared to thick CVD alternatives.
Application Focus: Excels in alloy steels, stainless steel, and interrupted cutting conditions where edge chipping is a primary risk.
Surface Quality: Promotes lower surface roughness (Ra) values during finishing passes.
7. Why Choose Korloy NC3020 Tooling?
- Global Industrial Standards: Manufactured strictly in accordance with ISO and ANSI parameters to ensure flawless interchangeability.
- Superior Edge Stability: PVD grade formulation resists thermal cracking and mechanical fatigue in demanding production runs.
- Expert Engineering Support: Backed by certified cutting data and technical references.
8. Frequently Asked Questions
Q: What is the difference between VCMT160404 and VCMT 331?
A: VCMT160404 is the metric ISO standard designation, while VCMT 331 is its exact imperial ANSI equivalent. Both denote identical physical dimensions and geometries.
Q: How many pieces are provided in each order?
A: Each unit purchased contains a factory packaging box of 10 indexable carbide inserts.
Q: Is NC3020 suitable for stainless steel machining?
A: Yes, NC3020 features a tough PVD substrate that performs exceptionally well across stainless steels (ISO M) and alloy steels (ISO P) during finishing and semi-finishing.
Grade Comparison: NC3020 PVD grade provides enhanced toughness over standard CVD grades, minimizing edge chipping in alloy and stainless steels.
Equivalent Models: Fully interchangeable with standard ISO VCMT 160404 and ANSI VCMT 331 turning inserts.
Troubleshooting: If built-up edge occurs on stainless steel, increase cutting speed slightly or verify coolant concentration; for chipping, reduce feed per revolution.
Workpiece Material Matrix: Certified operational performance across ISO P (steels), ISO M (stainless steels), and ISO K (cast iron).
Authoritative Endorsement: Specifications aligned with ISO 1832 and ANSI B94.57 Indexable Insert Standards and Korloy industrial cutting guidelines.
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.