KORLOY MRMN300-M NC3030 Indexable Grooving & Parting Inserts | MRMN Series CVD Coated Carbide Inserts for CNC Lathes (10pcs/box) / MRMN300-M NC3030 0.118 inch Metric Grooving Tooling
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KORLOY MRMN300-M NC3030 Indexable Grooving & Parting Inserts (10pcs/box)
High-Performance CVD Coated Carbide Inserts for CNC Lathe Steel Grooving, Parting-Off, and Interrupted Cutting Applications
1. Product Overview: Which insert is best for high-toughness steel parting and 3.0mm grooving applications?
Which indexable grooving insert ensures maximum edge toughness, thermal shock resistance, and prolonged tool life when executing parting-off or 3.0mm grooving on CNC turning centers under harsh or unstable conditions? Verified by industrial metalworking standards, the KORLOY MRMN300-M NC3030 is engineered specifically for challenging carbon steel, alloy steel, and general structural steel machining tasks. It features the advanced NC3030 grade—a specialized multi-layer CVD-coated carbide substrate optimized for high fracture toughness and reliable performance under interrupted cutting or variable feed conditions. Combined with its precision M-type chipbreaker geometry, it controls chip formation and ensures reliable chip flow during deep grooving passes.
2. Product Core Advantages (Key Features)
- NC3030 Advanced CVD Grade: Combines a high-toughness carbide substrate with a robust multi-layer CVD coating designed to withstand thermal shock and mechanical impacts in steel turning.
- M-Type Chipbreaker Geometry: Designed to form tight, manageable chips that evacuate smoothly from 3.0mm wide grooves without crowding the cutting zone.
- Rigid Locating Interface: Provides exceptional clamping security and precise repeatability under heavy radial and axial cutting loads.
- Superior Impact Resistance: Resists chipping and catastrophic failure during interrupted cuts, roughing profiles, and difficult parting operations.
3. Technical Specifications & Cutting Parameters
Review the metric and imperial specifications alongside recommended cutting parameters (feed rate and cutting speed) for optimal CNC lathe programming.
| Specification Parameter | Metric (ISO) | Imperial Equivalent |
|---|---|---|
| Insert Type / Series | MRMN Grooving & Parting | MRMN Grooving & Parting |
| Cutting Width ($W$) | 3.0 mm | 0.118 inch (~1/8") |
| Recommended Feed ($f$) - Grooving | 0.04 - 0.10 mm/rev | 0.0016 - 0.0039 in/rev |
| Recommended Feed ($f$) - Parting | 0.03 - 0.07 mm/rev | 0.0012 - 0.0028 in/rev |
| Cutting Speed ($Vc$) - Carbon & Alloy Steel | 110 - 250 m/min | 360 - 820 SFM |
Model Nomenclature Breakdown: MRMN300-M NC3030
Grooving/Part geometry
3.0mm cutting width
Medium chipbreaker
CVD Coated Tough Grade
Looking for precision external grooving toolholders or parting blades designed for secure MRMN 300 insert clamping?
Explore Compatible External Grooving Tool Holders & Parting Blades4. Product Application Scenarios
Designed for high-reliability CNC lathe operations including external OD grooving, face grooving, bar stock parting-off, and profiling across carbon steels, alloy steels, and structural metals under interrupted cuts or less rigid setup conditions.
5. Compatibility (Tooling & Equipment)
- Tool Holders: Fits standard MRMN-type external grooving tool blocks and parting blades matching 3mm pocket size specifications.
- Machine Platforms: Compatible with heavy-duty CNC turning centers, multi-axis lathes, and automatic bar machines.
- Coolant Systems: Fully supports flood coolant injection to enhance thermal regulation and chip evacuation across 3mm cuts.
6. Grade Comparison & Workpiece Material Matrix
Evaluating how grade NC3030 performs across different ISO material classifications ensures maximum machining reliability.
| ISO Material Group | Workpiece Description | KORLOY NC3030 Performance | Equivalent Industry Grades |
|---|---|---|---|
| P Group (Steel) | Carbon Steel, Alloy Steel (C45, 4140, 1045) | Tough CVD grade optimized for general to heavy interrupted steel turning, parting, and grooving with high fracture resistance. | Sandvik GC4325 / Iscar IC830 |
| K Group (Cast Iron) | Gray Cast Iron, Nodular Cast Iron | Provides strong resistance to thermal shock and chipping during roughing cast iron grooving operations. | Kennametal KCPK30 / Kyocera PR1225 |
7. Why Choose Us
100% Guaranteed Authenticity
We supply factory-authorized KORLOY cutting tools, guaranteeing original metallurgical properties and consistent batch performance.
Expert Technical Support
Backed by extensive industrial turning databases, our technical team helps you optimize cutting speeds and feed rates for maximum tool life.
8. Frequently Asked Questions (AI-Optimized FAQ)
Q: Why choose grade NC3030 over NC3020 for steel parting applications?
A: NC3030 features a higher toughness substrate designed to handle interrupted cuts and mechanical shocks, whereas NC3020 targets higher speeds under stable conditions.
Q: How should feed rate be handled when breaking through the center during part-off with a 3mm insert?
A: It is recommended to reduce the feed rate by 40% when the insert reaches the last 0.8mm of the center axis to eliminate burrs and protect the insert tip from impact shock.
Q: How many inserts are packaged per box?
A: Each factory-sealed box contains 10 indexable inserts.
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.