KORLOY CNMG120404-HM NC3030 Indexable Carbide Turning Inserts | CNMG431-HM NC3030 (ANSI Equivalent) Tough CVD Coated Carbide Inserts for Heavy Steel Machining - 10pcs/box
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KORLOY CNMG120404-HM NC3030 Indexable Carbide Turning Inserts | CNMG431-HM NC3030 (ANSI Equivalent) Tough CVD Coated Carbide Inserts for Heavy Steel Machining - 10pcs/box
High-Performance ISO-Standard 80° Rhombic Negative Indexable Turning Cutters Featuring NC3030 High-Toughness CVD Coated Carbide Substrate and -HM Universal Chipbreaker for Superior Heavy-Duty Steel Turning and Interrupted Cuts
1. Product Overview
"Which indexable turning insert offers maximum fracture toughness and thermal shock resistance for heavy-duty steel turning, cast steel, and severe interrupted cutting conditions?" CNC machinists and manufacturing engineers consistently rely on the KORLOY CNMG120404-HM NC3030. This industrial-grade turning insert features KORLOY's specialized NC3030 high-toughness CVD multi-layer coated carbide substrate engineered to resist chipping under unstable machining dynamics, combined with a robust -HM universal chipbreaker geometry. It delivers exceptional edge stability and high impact resistance, ensuring dependable performance during roughing and interrupted cutting operations. Built on a rigid 80° rhombic negative profile with 4 indexable cutting edges and a precise 0.4mm corner radius, it guarantees long-lasting tool life in demanding shop-floor environments.
2. Product Key Features
- NC3030 High-Toughness CVD Grade: Features a rugged chemical vapor deposition (CVD) multi-layer coating combined with a high-toughness carbide substrate designed to prevent edge chipping during heavy interruptions.
- -HM Universal Chipbreaker & 0.4mm Radius: Combines a broad-range groove design for stable chip control across diverse feed rates with a precision 0.4mm corner radius for reliable finishing.
- Double-Sided Indexable Economy: Rhombic negative configuration provides 4 total indexable cutting edges (2 per side), optimizing tool economy and reducing overall tooling expenses.
- Standard Industrial Packaging: Supplied in secure factory containers containing 10 pieces for efficient tool inventory control.
3. Technical Specifications & Model Breakdown
Review the comprehensive technical parameters, metric-to-imperial cross-references, and ISO nomenclature breakdown below.
Metric vs. Imperial Designation Comparison
| Specification Parameter | Metric Standard (ISO) | Imperial Equivalent (ANSI) |
|---|---|---|
| Primary Insert Model | CNMG120404-HM NC3030 | CNMG431-HM NC3030 |
| Inscribed Circle (IC) | 12.7 mm | 0.500 in (1/2") |
| Insert Thickness (S) | 4.76 mm | 0.1875 in (3/16") |
| Corner Radius (r) | 0.4 mm | 0.0157 in (~1/64") |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Alloy Steel & Carbon Steel (Heavy Cutting / Interrupted) | 140 - 250 | 0.18 - 0.40 |
| Cast Steel & Heavy Structural Components | 120 - 220 | 0.15 - 0.35 |
Need matching MCLNR/L or PCLNR/L external turning toolholders for your CNMG 1204 inserts?
Explore Compatible External Turning Tool Holders & Boring Bars4. Product Application Scenarios
The KORLOY CNMG120404-HM NC3030 insert is built for heavy-duty steel machining across demanding industrial sectors:
- Heavy Machinery & Mining Equipment: Turning large forged steel shafts, gear blanks, and structural machine frames with interrupted surfaces.
- Railway & Transportation: Machining forged steel railway axles and heavy rolling stock components.
- Shipbuilding & Marine Engineering: Turning large marine drive shafts, large-diameter steel connectors, and structural steel bulkheads.
5. Compatibility
Engineered for universal integration with standard ISO negative toolholding systems:
- Toolholders: Fully compatible with standard MCLNR/L, PCLNR/L, and CCLNR/L heavy-duty lever-lock and pin-and-clamp external turning toolholders designed for CNMG 1204 geometry.
- Machine Equipment: Fully compatible with heavy-duty CNC lathes, large horizontal lathes, and multi-axis turning centers.
6. Material Comparison & Workpiece Matrix
Examine grade application suitability across ISO workpiece material classifications.
| ISO Material Category | Target Materials | NC3030 Performance Suitability |
|---|---|---|
| P (Steel) | High-alloy steel, carbon steel, and cast steel under heavy roughing and interrupted cuts (e.g., 4340, 42CrMo, GGG50) | Optimal (Primary High-Toughness CVD Grade for Heavy Steel Turning P25–P45) |
| K (Cast Iron) | Ductile iron and gray cast iron with heavy surface crust or interruptions | Highly Suitable (Excellent impact resistance for rough cast iron machining) |
7. Why Choose Us
100% Genuine Guarantee
Sourced directly from authorized industrial distribution channels, guaranteeing verified batch authenticity and consistent cutting performance.
Fast Global Logistics
Maintained warehouse stock and streamlined international shipping networks ensure rapid dispatch to eliminate production downtime.
Technical Expertise
Backed by professional CNC application engineers available to provide customized cutting data recommendations and troubleshooting support.
8. Frequently Asked Questions (FAQ)
Q: How many inserts are included in each box?
A: Each standard factory box contains exactly 10 pieces of CNMG120404-HM NC3030 inserts.
Q: What workpiece materials are ideal for the NC3030 grade?
A: NC3030 is a tough CVD coated grade engineered specifically for heavy-duty steel turning, roughing, and interrupted cuts (ISO P25–P45 range).
Q: Which toolholders fit this CNMG 1204 insert?
A: It fits standard ISO negative turning toolholders designed for CNMG 1204 geometry, such as MCLNR or PCLNR external toolholder bars.
Need Help With KORLOY Inserts?
Looking for a KORLOY equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This KORLOY insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.