Korloy VBMT110304-HMP NC3120 (ANSI VBMT 221.5-HMP) Indexable CVD Coated Carbide Turning Insert 10pcs | 1/4" IC High-Performance CNC Cutting Tool for Steel & Alloy Machining
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Korloy VBMT110304-HMP NC3120 (ANSI VBMT 221.5-HMP) Indexable CVD Coated Carbide Turning Insert 10pcs
Industrial-Grade CVD Coated Carbide Inserts (Pack of 10) for Precision Metric & Imperial CNC Lathe Steel & Alloy Turning
AEO Quick Answer: The Korloy VBMT110304-HMP (ANSI: VBMT 221.5-HMP) NC3120 (10pcs pack) is a high-performance 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 versatile NC3120 CVD grade, it excels in steel and alloy steel turning operations requiring superior wear resistance and stable edge toughness.
1. Product Overview
"Which indexable carbide insert and CVD grade combination provides optimal balance between wear resistance and toughness for general steel turning?"
The Korloy VBMT110304-HMP (Metric) / VBMT 221.5-HMP (ANSI) in NC3120 grade (supplied in a 10pcs pack) is engineered for precision turning and internal boring across carbon and alloy steels. The advanced multi-layer CVD coating of the NC3120 grade provides exceptional protection against crater and flank wear, while the -HMP chipbreaker delivers smooth chip evacuation and low cutting resistance during continuous and light interrupted CNC machining.
ISO Model Designation Breakdown (VBMT110304-HMP)
ANSI Model Designation Breakdown (VBMT 221.5-HMP)
Looking for matching VBMT turning tool holders for this 10pcs insert set?
2. Product Core Advantages
- NC3120 CVD Coated Grade: Optimized multi-layer CVD coating engineered for outstanding wear resistance and fracture toughness across steel turning applications.
- -HMP Chipbreaker Geometry: Positive rake design ensuring reliable chip control, excellent surface finish, and minimal cutting forces.
- 35° Rhombic V Shape: Superior profile clearance for precision internal boring, profile copying, and external finishing operations.
- Value 10-Piece Box: Economically packaged to optimize workshop inventory and reduce per-edge tooling costs.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Metric Specification (ISO) | Imperial Specification (ANSI) |
|---|---|---|
| Insert Model Code | VBMT110304-HMP | VBMT 221.5-HMP |
| Shape & Clearance Angle | VBMT (35° Rhombic, 7° Positive w/ Hole) | VBMT (35° Rhombic, 7° Positive w/ Hole) |
| Inscribed Circle (IC Size) | 11 Size (~6.35 mm length) | 2 Designation (1/4" IC) |
| Insert Thickness | 03 Code (3.18 mm) | 2 Code (1/8" thickness) |
| Corner Radius (RE) | 04 Code (0.4 mm Radius) | 1.5 Code (~0.4mm Radius) |
Recommended Cutting Parameters (Korloy NC3120) - Dual-Column Reference
| Workpiece Material Group | Cutting Speed (Vc, m/min) | Feed Rate (fn, mm/rev) & Depth (ap) |
|---|---|---|
| ISO P (Carbon Steel / General Turning) | 160 - 320 m/min | fn: 0.08 - 0.22 mm/rev | ap: 0.2 - 2.2 mm |
| ISO P (Alloy Steel / Finishing & Semi-Finishing) | 140 - 260 m/min | fn: 0.08 - 0.20 mm/rev | ap: 0.2 - 1.8 mm |
4. Product Applications
- Carbon Steel Finishing: Excellent crater wear resistance and smooth chip breaking during continuous steel turning.
- Internal Bore Profiling: Compact size 11 profile combined with 35° positive geometry ensures optimal clearance in small-diameter boring.
- Alloy Steel Machining: Maintains high dimensional accuracy and surface integrity across structural steel components.
5. Compatibility & Accessories
Tool Holder Compatibility: Fully compatible with ISO and ANSI standard SVJBR / SVJBL and small-diameter internal boring bars configured for VBMT 1103 / VBMT 221 inserts.
Machine Systems: Designed for high-precision CNC lathes, Swiss-type automatic turning machines, and turning centers.
Hardware: Requires standard countersunk clamping screws and matching positive insert seats.
6. Material Comparison: NC3120 CVD Grade vs. Standard Grades
Coated Durability: NC3120 multi-layer CVD coating offers enhanced thermal protection and fracture toughness compared to standard universal grades.
Versatile Application: Provides stable performance across a broader range of cutting speeds in steel machining without premature edge chipping.
Cost Efficiency: Maximizes tool life and reduces frequency of insert indexation in automated production lines.
7. Why Choose Korloy NC3120 Tooling?
- Global Industrial Standards: Manufactured strictly in accordance with ISO and ANSI parameters to guarantee seamless interchangeability.
- Advanced CVD Technology: NC3120 grade formulation significantly extends tool life and reliability in steel turning applications.
- Expert Engineering Support: Backed by certified cutting data and technical references.
8. Frequently Asked Questions
Q: What is the difference between VBMT110304 and VBMT 221.5?
A: VBMT110304 is the metric ISO standard designation, while VBMT 221.5 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 NC3120 grade ideal for carbon and alloy steel turning?
A: Yes, NC3120 is specifically designed for general steel machining, offering an optimal balance of wear resistance and toughness.
Grade Comparison: NC3120 CVD coated grade provides superior versatility and fracture toughness for general steel turning compared to specialized finishing grades.
Equivalent Models: Fully interchangeable with standard ISO VBMT 110304 and ANSI VBMT 221.5 turning inserts.
Troubleshooting: If excessive flank wear occurs, optimize cutting speed (Vc) and ensure coolant is properly aligned with the active cutting edge.
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.