KORLOY MRMN250-M PC9030 Indexable Grooving & Parting Inserts | MRMN Series PVD Coated Carbide Inserts for CNC Lathes (10pcs/box) / MRMN250-M PC9030 0.098 inch Metric Grooving Tooling
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KORLOY MRMN250-M PC9030 Indexable Grooving & Parting Inserts (10pcs/box)
High-Performance PVD Coated Carbide Inserts for CNC Lathe Stainless Steel Grooving, Parting-Off, and Precision Turning Applications
1. Product Overview: Which insert is best for stainless steel parting and 2.5mm grooving applications?
Which indexable grooving insert ensures maximum wear resistance, thermal shock resistance, and smooth chip evacuation when executing parting-off or 2.5mm grooving on CNC turning centers working with stainless steel and alloy steels? Verified by industrial metalworking standards, the KORLOY MRMN250-M PC9030 is engineered specifically for challenging stainless steel, heat-resistant alloy, and carbon steel machining tasks. It features the advanced PC9030 grade—a specialized PVD-coated carbide substrate optimized for high fracture toughness and resistance to built-up edge (BUE) under continuous 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)
- PC9030 Advanced PVD Grade: Combines a high-toughness carbide substrate with a smooth PVD nano-coating designed to reduce friction and prevent chemical wear in stainless steel turning.
- M-Type Chipbreaker Geometry: Designed to form tight, manageable chips that evacuate smoothly from 2.5mm 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 Built-Up Edge Resistance: Resists adhesive wear and micro-chipping during difficult parting operations on gummy materials.
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 ($W$) | 2.5 mm | 0.098 inch (~3/32") |
| Recommended Feed ($f$) - Grooving | 0.03 - 0.08 mm/rev | 0.0012 - 0.0031 in/rev |
| Recommended Feed ($f$) - Parting | 0.02 - 0.06 mm/rev | 0.0008 - 0.0024 in/rev |
| Cutting Speed ($Vc$) - Stainless Steel | 90 - 180 m/min | 300 - 590 SFM |
Model Nomenclature Breakdown: MRMN250-M PC9030
Grooving/Part geometry
2.5mm cutting width
Medium chipbreaker
PVD Coated Tough Grade
Looking for precision external grooving toolholders or parting blades designed for secure MRMN 250 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 austenitic stainless steels, precipitation hardening steels, and alloy steels under demanding coolant or production conditions.
5. Compatibility (Tooling & Equipment)
- Tool Holders: Fits standard MRMN-type external grooving tool blocks and parting blades matching 2.5mm pocket size specifications.
- Machine Platforms: Compatible with heavy-duty CNC turning centers, Swiss-type lathes, and automatic bar machines.
- Coolant Systems: Highly compatible with high-pressure flood coolant injection to control thermal build-up during stainless steel cutting.
6. Grade Comparison & Workpiece Material Matrix
Evaluating how grade PC9030 performs across different ISO material classifications ensures maximum machining reliability.
| ISO Material Group | Workpiece Description | KORLOY PC9030 Performance | Equivalent Industry Grades |
|---|---|---|---|
| M Group (Stainless Steel) | Austenitic & Duplex Stainless Steel (304, 316, 2205) | Specialized PVD grade optimized for excellent thermal crack resistance and prevention of built-up edge in stainless turning. | Sandvik GC2015 / Iscar IC908 |
| S Group (Superalloys) | Titanium Alloys, Inconel, Heat-Resistant Steels | Provides high wear resistance and edge strength under high thermal loads typical of aerospace alloy machining. | Kennametal KCU25 / Kyocera PR930 |
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 is grade PC9030 recommended over CVD grades for stainless steel grooving?
A: PC9030 uses a advanced PVD coating that provides a smoother rake face and superior resistance to chemical wear and built-up edge, which are common failure modes in stainless steel machining.
Q: How should feed rate be handled when breaking through the center during part-off with a 2.5mm insert?
A: It is recommended to reduce the feed rate by 40% when the insert reaches the last 0.6mm 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.