KORLOY SNMG120404-HM NC3030 Indexable Carbide Turning Inserts | SNMG431-HM (ANSI Equivalent) CVD Coated Inserts for Steel and General Machining - 10pcs/box
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KORLOY SNMG120404-HM NC3030 Indexable Carbide Turning Inserts | SNMG431-HM (ANSI Equivalent) CVD Coated Inserts for Steel and General Machining - 10pcs/box
High-Performance ISO-Standard 90° Square Negative Indexable Turning Cutters Featuring NC3030 CVD Coating and -HM General Chipbreaker for Precise Steel Turning
1. Product Overview
"Which indexable turning insert is best suited for high-reliability steel turning and general alloy machining with exceptional wear resistance and thermal shock stability?" CNC operators and manufacturing engineers consistently choose the KORLOY SNMG120404-HM NC3030. This industrial-grade turning insert combines a tough NC3030 CVD-coated carbide substrate with an optimized -HM chipbreaker geometry, delivering excellent chip control, low cutting forces, and extended tool life across continuous and interrupted steel turning applications. Built upon a rigid 90° square negative outline with 8 indexable cutting edges and a precise 0.4mm corner radius, it guarantees exceptional edge stability and fine surface finish quality.
2. Product Key Features
- NC3030 CVD Coated Grade: Engineered with a robust carbide substrate and an advanced multi-layer CVD coating designed to maximize wear resistance, toughness, and thermal stability when machining carbon steels and alloy steels.
- -HM Chipbreaker & 0.4mm Radius: Features a versatile groove geometry engineered for general-to-finishing turning operations with smooth chip evacuation, paired with a sharp 0.4mm corner radius for tight tolerance control and refined surface finishes.
- Double-Sided Indexable Economy: Square negative configuration provides 8 total indexable cutting edges (4 per side), optimizing machining economy and cost-per-edge metrics.
- Standard Industrial Packaging: Delivered in secure factory containers containing 10 pieces for efficient shop floor inventory management.
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 | SNMG120404-HM | SNMG431-HM |
| 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 |
|---|---|---|
| Carbon Steel & Low Alloy Steel (e.g., C45, 4140) | 140 - 280 | 0.12 - 0.30 |
| Alloy Steel & Structural Steel | 110 - 220 | 0.10 - 0.25 |
Need matching MSSNR or PSBNR external turning toolholders for your SNMG 1204 inserts?
Explore Compatible External Turning Tool Holders & Boring Bars4. Product Application Scenarios
The KORLOY SNMG120404-HM NC3030 insert performs exceptionally well across general engineering and heavy steel fabrication applications:
- General Machinery Manufacturing: External turning of steel shafts, axles, and cylindrical gear blanks.
- Heavy Industrial Equipment: Rough and semi-finish profiling of large carbon steel structural components.
- Mold & Die Base Machining: Efficient stock removal on medium-hardness mold steel plates and blocks.
5. Compatibility
Engineered for universal integration with standard ISO negative toolholding systems:
- Toolholders: Fully compatible with standard MSSNR/L, PSBNR/L, and CSBNR/L pin-and-clamp external turning toolholders designed for SNMG 1204 inserts.
- Machine Equipment: Suitable for conventional lathes, heavy-duty CNC turning centers, and automated manufacturing cells.
6. Material Comparison & Workpiece Matrix
Examine grade application suitability across ISO workpiece material classifications.
| ISO Material Category | Target Materials | NC3030 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steel, alloy steel, and free-cutting steel (e.g., 1020, 1045, 4140) | Optimal (High-Performance General CVD Coated Grade Optimized for P20–P40 Steel Turning) |
| K (Cast Iron) | Gray cast iron (FC250, FC300) and ductile iron | Conditional (Suitable for stable continuous cutting of iron castings) |
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 SNMG120404-HM NC3030 inserts.
Q: What makes NC3030 ideal for general steel machining?
A: NC3030 utilizes a balanced multi-layer CVD coating that provides excellent flank wear resistance and thermal stability across broad cutting speeds in carbon and alloy steels.
Q: Which toolholders are compatible with this SNMG 1204 insert?
A: It fits standard ISO negative turning toolholders designed for SNMG 1204 geometry, such as MSSNR or PSBNR 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.