Korloy Indexable Turning Insert CNMG160616-GR NC3020 | CNMG 644-GR (Imperial Equivalent) PVD Coated Carbide Inserts for Heavy-Duty Steel Turning - 10pcs Box
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Korloy Indexable Turning Insert CNMG160616-GR NC3020 | CNMG 644-GR (Imperial Equivalent) PVD Coated Carbide Inserts for Heavy-Duty Steel Turning - 10pcs Box
High-Performance ISO-Standard 80° Rhombic Negative Indexable Turning Cutters for Industrial CNC Steel & Alloy Steel Roughing Operations
1. Product Overview
"Which indexable turning insert is best suited for heavy-duty CNC carbon steel and alloy steel roughing operations requiring high impact resistance, exceptional edge toughness, and dependable chip management?" CNC programmers and machine shop supervisors frequently select the Korloy CNMG160616-GR NC3020. This industrial-grade indexable carbide turning insert features an advanced high-performance NC3020 PVD-coated grade optimized for steels and alloy materials, combined with an 80° rhombic negative geometry, a robust 1.6mm corner radius for high feed rates, and a specialized -GR chipbreaker engineered to provide excellent chip breaking, minimized cutting forces, and superior edge security during demanding roughing and semi-roughing processes.
2. Product Key Features
- NC3020 Advanced PVD Grade Technology: A specialized high-toughness carbide substrate combined with a resilient multi-layer PVD coating engineered specifically to resist thermal shock and chipping during aggressive steel turning.
- Optimized -GR Chipbreaker Geometry: Double-sided negative rake angle design with a wide breaker groove engineered to handle heavy depths of cut and control long, stringy chips during roughing passes.
- ISO Standard Compliance: Manufactured strictly under international cutting tool standards to guarantee secure pin-and-clamp retention and exact interchangeability across standard negative external turning tool holders.
- Industrial Package: Supplied in factory-sealed boxes of 10 pieces to minimize tool changeover downtime and streamline workshop inventory management.
3. Technical Specifications & Model Breakdown
Examine the comprehensive parameter specifications, metric and imperial equivalents, and ISO coding breakdown below for precise CNC lathe integration.
Metric vs. Imperial Designation Comparison
| Specification Parameter | Metric Standard (ISO) | Imperial Equivalent (ANSI) |
|---|---|---|
| Primary Insert Model | CNMG160616-GR | CNMG 644-GR |
| Inscribed Circle / Size | 15.875 mm (16 series / 1/2" scale) | 3/4" nominal (6 series / 15.88mm equivalent scale) |
| Insert Thickness (06) | 6.35 mm (1/4" thickness class) | 0.250 inch (4 series / 1/4" scale) |
| Corner Radius (16) | 1.6 mm | 0.0625 inch (4 radius designation scale / 1/16") |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Carbon Steels & Structural Steels (P20 - P40) | 150 - 280 | 0.30 - 0.65 |
| Low Alloy Steels & Cast Steels (P30 - P50) | 120 - 240 | 0.25 - 0.55 |
Need matching MCLNR/L or PCLNR/L external negative turning tool holders for your 1606 CNMG inserts?
Explore Compatible Negative Turning Tool Holders4. Product Application Scenarios
The Korloy CNMG160616-GR NC3020 insert performs exceptionally across heavy engineering and manufacturing sectors:
- Large Forged Shafts: Heavy outer diameter (OD) roughing and material removal on large steel forgings and turbine components.
- Industrial Rollers & Cylinders: Aggressive skin-cut and rough turning operations on massive alloy steel industrial rolls.
- Heavy Machinery Structural Parts: High-feed roughing passes on carbon steel structural elements and heavy gear blanks.
5. Compatibility
Designed to integrate seamlessly into standard negative industrial turning systems:
- Tool Holders: Fully compatible with MCLNR/L, PCLNR/L, and MWLNR/L negative external turning tool holders configured for CNMG 1606 series inserts.
- CNC Machinery: Optimized for heavy-duty CNC lathes, horizontal turning centers, and vertical lathes requiring secure lever-lock or pin-lock clamping.
6. Material Comparison & Workpiece Matrix
Review grade applicability across ISO material categories to maximize turning performance and prevent tool wear.
| ISO Material Category | Target Materials | NC3020 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steels, alloy steels, heavy steel forgings | Excellent (Primary PVD Grade for Heavy Steel Roughing) |
| K (Cast Iron) | Gray cast iron, nodular cast iron | Good (Suitable for roughing cast iron components) |
| M (Stainless Steel) | Austenitic stainless steels | Moderate (Dedicated PC5300 grade recommended for stainless 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: What are the key advantages of selecting the 1.6mm corner radius (-16) for steel roughing?
A: The robust 1.6mm corner radius distributes cutting loads over a larger area, offering exceptional thermal and mechanical strength against edge chipping during aggressive high-feed roughing operations.
Q: How many inserts are included in each factory package?
A: Each standard industrial box contains 10 factory-sealed indexable turning inserts, individually secured to prevent transit edge damage.
Q: How does NC3020 grade maintain edge integrity during high-load roughing?
A: NC3020 combines a high-toughness carbide matrix with a specialized PVD coating that resists thermal cracking and flank wear under heavy depths of cut in steel.
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.