KORLOY CNMG090304-HM NC3030 Indexable Carbide Turning Inserts | CNMG321-HM (ANSI Equivalent) CVD Coated Inserts for Steel and Alloy Machining - 10pcs/box
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KORLOY CNMG090304-HM NC3030 Indexable Carbide Turning Inserts | CNMG321-HM (ANSI Equivalent) CVD Coated Inserts for Steel and Alloy Machining - 10pcs/box
High-Performance ISO-Standard 80° Rhombic Negative Indexable Turning Cutters Featuring NC3030 CVD Multi-Layer Coated Carbide Substrate and -HM General-Purpose Chipbreaker for Superior Steel Turning
1. Product Overview
"Which indexable turning insert is best suited for stable to general machining of carbon steels, alloy steels, and cast components while offering exceptional wear resistance and extended tool life?" CNC machinists and manufacturing engineers consistently select the KORLOY CNMG090304-HM NC3030. This industrial-grade turning insert features an advanced NC3030 CVD multi-layer coated carbide substrate paired with an optimized -HM general-purpose chipbreaker geometry. It delivers balanced toughness, excellent crater wear resistance, and reliable chip control across continuous and interrupted cutting conditions. Built upon a rigid 80° rhombic negative profile with 4 indexable cutting edges and a precise 0.4mm corner radius, it guarantees supreme operational reliability.
2. Product Key Features
- NC3030 CVD Coated Grade: Engineered with a robust multi-layer Chemical Vapor Deposition (CVD) coating optimized for high resistance to thermal shock and flank wear when machining structural and alloy steels.
- -HM Chipbreaker & 0.4mm Radius: Features a double-sided general-purpose groove design providing smooth chip flow across medium cutting depths, combined with a precision 0.4mm corner radius for fine surface finishes.
- Double-Sided Indexable Economy: Rhombic negative configuration provides 4 total indexable cutting edges (2 per side), maximizing cost-efficiency on the shop floor.
- Standard Industrial Packaging: Supplied in secure factory containers containing 10 pieces for efficient tool 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 | CNMG090304-HM | CNMG321-HM |
| Inscribed Circle (IC) | 9.525 mm | 0.375 in (3/8") |
| Insert Thickness (S) | 3.18 mm | 0.125 in (1/8") |
| 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 Steels & Low Alloy Steels (e.g., C45, 4140) | 180 - 350 | 0.15 - 0.35 |
| Alloy Steels & Tool Steels (Hardness < 35HRC) | 140 - 280 | 0.12 - 0.30 |
Need matching MCLNR/L or PCLNR/L external turning toolholders for your CNMG 0903 inserts?
Explore Compatible External Turning Tool Holders & Boring Bars4. Product Application Scenarios
The KORLOY CNMG090304-HM NC3030 insert is optimized for general turning across steel fabrication and machinery sectors:
- General Mechanical Engineering: External turning, facing, and contouring of carbon steel shafts, gears, and structural components.
- Automotive Powertrain Manufacturing: Machining forged steel steering knuckles, transmission shafts, and axle components.
- Industrial Maintenance & Repair: Versatile stock removal across diverse medium-hardness steel workpieces.
5. Compatibility
Engineered for universal integration with standard ISO negative toolholding systems:
- Toolholders: Fully compatible with standard MCLNR/L, PCLNR/L, and CCLNR/L lever-lock and pin-and-clamp external turning toolholders designed for CNMG 0903 geometry.
- Machine Equipment: Fully compatible with CNC lathes, turning centers, and conventional engine lathes utilized in industrial machine shops.
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, free-cutting steel (e.g., C45, 42CrMo4, 20MnCr5) | Optimal (Primary CVD Coated Grade for General Steel Turning P20–P35) |
| M (Stainless Steel) / K (Cast Iron) | Austenitic stainless steels and grey/ductile cast irons (conditional use) | Conditional (Suitable for Light Intermittent Cast Iron and Soft Stainless 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 CNMG090304-HM NC3030 inserts.
Q: What makes NC3030 ideal for general steel turning?
A: NC3030 features a tough carbide substrate combined with a specialized multi-layer CVD coating that resists thermal wear and chipping during continuous and general steel machining operations.
Q: Which toolholders fit this CNMG 0903 insert?
A: It fits standard ISO negative turning toolholders designed for CNMG 0903 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.