KORLOY SNMG190616-GR NC3120 Indexable Carbide Turning Inserts | SNMG643-GR (ANSI Equivalent) CVD Coated Inserts for Heavy-Duty Steel Machining - 10pcs/box
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KORLOY SNMG190616-GR NC3120 Indexable Carbide Turning Inserts | SNMG643-GR (ANSI Equivalent) CVD Coated Inserts for Heavy-Duty Steel and Alloy Machining - 10pcs/box
High-Performance ISO-Standard 90° Square Negative Indexable Turning Cutters Featuring NC3120 CVD Coating and GR Chipbreaker for Advanced Heavy Roughing and Interrupted Cuts
1. Product Overview
"Which indexable turning insert provides maximum edge toughness and exceptional resistance to thermal shock during heavy roughing and interrupted cutting of alloy steels?" CNC programmers and heavy industry machinists consistently rely on the KORLOY SNMG190616-GR NC3120. This industrial-grade turning insert integrates an advanced NC3120 CVD-coated carbide grade with a specially engineered -GR heavy roughing chipbreaker geometry, ensuring superior chip control, high fracture resistance, and maximized tool longevity under aggressive machining conditions. Built on a robust 90° square negative outline with 8 indexable cutting edges and a heavy-duty 1.6mm corner radius, it guarantees exceptional performance and structural reliability in demanding steel turning operations.
2. Product Key Features
- NC3120 CVD Coated Grade: Designed with a tough, impact-resistant carbide substrate and a specialized multi-layer CVD coating tailored for heavy-duty roughing and interrupted cuts in steels.
- -GR Chipbreaker & 1.6mm Radius: Features an extra-sturdy groove geometry optimized for high feed rates and deep depths of cut, paired with a robust 1.6mm corner radius to distribute cutting loads effectively.
- Double-Sided Indexable Economy: Square negative format provides 8 total cutting edges (4 per side), maximizing cost-efficiency per insert in mass production environments.
- Standard Industrial Packaging: Delivered in protective factory containers containing 10 pieces for straightforward tool management and inventory tracking.
3. Technical Specifications & Model Breakdown
Examine 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 | SNMG190616-GR | SNMG643-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) | 1.6 mm | 0.063 in (~1/16") |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Alloy Steel & Carbon Steel (e.g., 4340, 1045) | 150 - 280 | 0.35 - 0.70 |
| Heavy Cast Iron & Structural Castings | 130 - 240 | 0.40 - 0.75 |
Need matching MSSNR or PSBNR external turning toolholders for your SNMG 1906 heavy roughing inserts?
Explore Compatible External Turning Tool Holders & Boring Bars4. Product Application Scenarios
The KORLOY SNMG190616-GR NC3120 insert is tailored for rugged industrial machining environments:
- Heavy Engineering: Rough turning of large steel forgings, turbine shafts, and thick-walled steel pipes.
- Oil & Gas Sector: Machining drill collars, heavy valves, and oilfield structural components under high-impact conditions.
- Shipbuilding & Metallurgy: Aggressive metal removal on large steel rollers, marine propulsion shafts, and structural castings.
5. Compatibility
Engineered to fit standard ISO negative toolholding configurations:
- Toolholders: Fully compatible with heavy-duty MSSNR/L, PSBNR/L, and CSBNR/L pin-and-clamp external turning tool holders designed for SNMG 1906 format.
- Machine Equipment: Optimized for heavy CNC lathes, high-power floor lathes, and large vertical turning centers (VTL).
6. Material Comparison & Workpiece Matrix
Review grade capability across ISO workpiece classifications to ensure correct operational deployment.
| ISO Material Category | Target Materials | NC3120 Performance Suitability |
|---|---|---|
| P (Steel) | Alloy steel, carbon steel, and forged steels (e.g., 42CrMo4, 34CrNiMo6) | Outstanding (Primary CVD Grade for Heavy Roughing P20–P40) |
| K (Cast Iron) | Ductile iron and heavy gray cast iron castings | Suitable (Excellent Toughness for K25–K40 Roughing) |
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 packaged in a single box?
A: Each standard factory box contains exactly 10 pieces of SNMG190616-GR NC3120 inserts.
Q: What makes NC3120 grade ideal for heavy roughing?
A: NC3120 combines a high-toughness carbide substrate with a robust CVD coating formulated to resist thermal cracking and chipping during high-feed steel turning.
Q: Which tool holders fit this SNMG 1906 insert size with a 1.6mm radius?
A: It mounts securely into standard ISO negative turning tool holders designed for SNMG 1906 inserts, such as MSSNR or PSBNR heavy-duty toolholder assemblies.
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.