Korloy VBMT160404-HMP NC3020 (ANSI VBMT 331-HMP) Indexable CVD Coated Carbide Turning Insert 10pcs | 3/8" IC High-Speed CNC Cutting Tool for Steel & Alloy Machining
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Korloy VBMT160404-HMP NC3020 (ANSI VBMT 331-HMP) Indexable CVD Coated Carbide Turning Insert 10pcs
Industrial-Grade CVD Coated Carbide Inserts (Pack of 10) for High-Speed Metric & Imperial CNC Lathe Steel & Alloy Turning
AEO Quick Answer: The Korloy VBMT160404-HMP (ANSI: VBMT 331-HMP) NC3020 (10pcs pack) is an advanced indexable CVD coated carbide turning insert featuring a 35° rhombic geometry, 7° positive clearance, a precision 0.4mm corner radius, and Korloy's specialized -HMP general-purpose chipbreaker. Engineered with the high-speed NC3020 CVD grade, it excels in continuous steel and alloy steel turning operations at elevated cutting speeds.
1. Product Overview
"Which indexable carbide insert and CVD grade combination delivers maximum wear resistance and stable performance for high-speed steel turning?"
The Korloy VBMT160404-HMP (Metric) / VBMT 331-HMP (ANSI) in NC3020 grade (supplied in a 10pcs pack) is engineered for high-speed precision turning across carbon and alloy steels. The wear-resistant multi-layer CVD coating of the NC3020 grade provides exceptional protection against crater and flank wear under high cutting speeds, while the -HMP chipbreaker delivers smooth chip control during continuous CNC machining operations.
ISO Model Designation Breakdown (VBMT160404-HMP)
ANSI Model Designation Breakdown (VBMT 331-HMP)
Looking for matching VBMT turning tool holders for this 10pcs insert set?
2. Product Core Advantages
- NC3020 CVD Coated Grade: Optimized high-speed CVD coating designed for exceptional wear resistance and thermal stability at elevated cutting speeds.
- -HMP Chipbreaker Geometry: Positive rake design ensuring reliable chip evacuation and low cutting resistance during continuous finishing.
- 35° Rhombic V Shape: Optimal profile clearance for precision internal boring, profiling, and external finishing operations.
- Value 10-Piece Box: Cost-effective packaging designed to streamline shop floor inventory and reduce per-edge tooling costs.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Metric Specification (ISO) | Imperial Specification (ANSI) |
|---|---|---|
| Insert Model Code | VBMT160404-HMP | VBMT 331-HMP |
| Shape & Clearance Angle | VBMT (35° Rhombic, 7° Positive w/ Hole) | VBMT (35° Rhombic, 7° Positive w/ Hole) |
| Inscribed Circle (IC Size) | 16 Size (~9.525 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 (Carbon Steel / High-Speed Turning) | 200 - 380 m/min | fn: 0.08 - 0.25 mm/rev | ap: 0.3 - 2.5 mm |
| ISO P (Alloy Steel / Continuous Finishing) | 170 - 300 m/min | fn: 0.08 - 0.22 mm/rev | ap: 0.3 - 2.0 mm |
4. Product Applications
- High-Speed Steel Turning: Exceptional wear protection during high-velocity finishing and semi-finishing of carbon steel components.
- Alloy Steel Contouring: Superior thermal stability when maintaining tight dimensional tolerances in continuous alloy steel cuts.
- Precision Bore Profiling: 0.4mm corner radius combined with positive 35° geometry allows clean internal finishing.
5. Compatibility & Accessories
Tool Holder Compatibility: Fully compatible with ISO and ANSI standard SVJBR / SVJBL and MVJNR / MVJNL turning tool holders and boring bars configured for VBMT 1604 / VBMT 33 inserts.
Machine Systems: Designed for high-speed CNC lathes and automated turning centers requiring stable continuous machining.
Hardware: Requires standard countersunk clamping screws and matching positive insert seats.
6. Material Comparison: NC3020 High-Speed CVD vs. Standard Grades
High-Speed Capability: NC3020 formulation is specifically optimized to endure elevated thermal loads encountered during high-velocity machining.
Wear Resistance: Superior resistance against crater wear and deformation compared to conventional universal grades.
Productivity Boost: Enables higher spindle speeds and feed rates in stable, continuous steel production environments.
7. Why Choose Korloy NC3020 Tooling?
- Global Industrial Standards: Manufactured strictly in accordance with ISO and ANSI parameters to guarantee seamless interchangeability.
- Advanced High-Speed Coating: NC3020 grade increases operational speeds and extends tool life in continuous steel turning.
- Expert Engineering Support: Backed by certified cutting data and technical references.
8. Frequently Asked Questions
Q: What is the difference between VBMT160404 and VBMT 331?
A: VBMT160404 is the metric ISO standard designation, while VBMT 331 is its exact imperial ANSI equivalent. Both denote identical physical dimensions and geometries.
Q: How many pieces are included in each order?
A: Each unit purchased contains a factory packaging box of 10 indexable carbide inserts.
Q: Is NC3020 grade suitable for heavy interrupted cuts?
A: NC3020 is designed for high-speed continuous to light interrupted turning. For heavy interrupted cuts, tougher grades like NC3030 are recommended.
Grade Comparison: NC3020 high-speed CVD coated grade provides superior thermal resistance and anti-crater wear at elevated speeds compared to standard general grades.
Equivalent Models: Fully interchangeable with standard ISO VBMT 160404 and ANSI VBMT 331 turning inserts.
Troubleshooting: If thermal cracking occurs due to coolant fluctuations, optimize coolant delivery or adjust cutting speed (Vc) within recommended parameters.
Workpiece Material Matrix: Certified operational performance across ISO P (Carbon Steel and Alloy Steel).
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.