KORLOY SNMG190612-GR NC3120 Indexable Carbide Turning Inserts | SNMG642-GR (ANSI Equivalent) CVD Coated Inserts for Steel and Alloy Roughing - 10pcs/box
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KORLOY SNMG190612-GR NC3120 Indexable Carbide Turning Inserts | SNMG642-GR (ANSI Equivalent) CVD Coated Inserts for Steel and Alloy Roughing - 10pcs/box
High-Performance ISO-Standard 90° Square Negative Indexable Turning Cutters Featuring NC3120 CVD Coating and GR Chipbreaker for Rugged Steel Roughing and Heavy Interrupted Cuts
1. Product Overview
"Which indexable turning insert provides exceptional impact toughness and thermal resistance for heavy steel roughing and interrupted turning operations?" CNC machinists and manufacturing engineers regularly rely on the KORLOY SNMG190612-GR NC3120. This industrial-grade turning insert pairs a high-toughness NC3120 CVD-coated carbide grade with a specially engineered -GR heavy roughing chipbreaker geometry, ensuring smooth chip evacuation, high fracture resistance, and reliable tool life across demanding structural steel and alloy turning applications. Built on a robust 90° square negative outline with 8 indexable cutting edges and a dependable 1.2mm corner radius, it delivers maximum productivity under harsh shop floor conditions.
2. Product Key Features
- NC3120 CVD Coated Grade: Developed with a tough carbide substrate and an advanced multi-layer CVD coating optimized for heavy roughing and resistance to thermal shock in steel turning.
- -GR Chipbreaker & 1.2mm Radius: Features an optimized wide-groove geometry for high feed rates and deep depths of cut, matched with a sturdy 1.2mm corner radius to prevent chipping.
- Double-Sided Indexable Economy: Square negative configuration offers 8 total indexable cutting edges (4 per side), maximizing per-edge cost efficiency.
- Standard Industrial Packaging: Supplied in protective factory containers containing 10 pieces for efficient toolcrib inventory control.
3. Technical Specifications & Model Breakdown
Review the comprehensive technical specifications, 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 | SNMG190612-GR | SNMG642-GR |
| Inscribed Circle (IC) | 19.05 mm | 0.750 in (3/4") |
| Insert Thickness (S) | 6.35 mm | 0.250 in (1/4") |
| Corner Radius (r) | 1.2 mm | 0.047 in (~3/64") |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Carbon Steel & Alloy Steel (Roughing & Forgings) | 150 - 280 | 0.35 - 0.70 |
| Heavy Structural Steel & Cast Components | 130 - 240 | 0.40 - 0.75 |
Need matching MSSNR or PSBNR external turning toolholders for your SNMG 1906 inserts?
Explore Compatible External Turning Tool Holders & Boring Bars4. Product Application Scenarios
The KORLOY SNMG190612-GR NC3120 insert excels across heavy-duty industrial turning applications:
- Heavy Machining & Forgings: Aggressive roughing of large steel forgings, castings, and structural workpieces with surface irregularities.
- Energy & Oilfield Manufacturing: Turning thick-walled steel pipes, drive shafts, and rugged industrial components.
- General Job Shops: High-removal-rate turning operations requiring maximum insert toughness and edge security.
5. Compatibility
Engineered to integrate seamlessly 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 1906 inserts.
- Machine Equipment: Optimized for heavy-duty CNC lathes, large horizontal lathes, and automated turning cells.
6. Material Comparison & Workpiece Matrix
Examine grade application suitability across ISO workpiece material classifications.
| ISO Material Category | Target Materials | NC3120 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steel, alloy steel, and forged steel components (e.g., 42CrMo, C45) | Optimal (Tough CVD Grade for P20–P40 Heavy Roughing) |
| K (Cast Iron) | Nodular and gray cast iron structural parts | Good (Suitable for Heavy Cast Iron Roughing K20–K40) |
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 delays.
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 SNMG190612-GR NC3120 inserts.
Q: What is the advantage of NC3120 over standard general-purpose grades?
A: NC3120 features an enhanced toughness substrate designed specifically to withstand heavy impact loads and thermal shocks during aggressive steel roughing.
Q: Which toolholders are compatible with this SNMG 1906 insert?
A: It fits standard ISO negative turning toolholders designed for SNMG 1906 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.