KORLOY MRMN400-M PC9030 Indexable Grooving & Parting Inserts | MRMN Series PVD Coated Carbide Inserts for CNC Lathes (10pcs/box) / MRMN400-M PC9030 0.157 inch Metric Grooving Tooling
Free shipping on all orders.
Check compatibility: Confirm the model and dimensions before ordering.
Need help choosing? Contact us before ordering.
💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
KORLOY MRMN400-M PC9030 Indexable Grooving & Parting Inserts (10pcs/box)
High-Performance PVD Coated Carbide Inserts for CNC Lathe Steel and Stainless Steel Grooving, Parting-Off, and Turning Applications
1. Product Overview: Which insert is best for precision stainless steel and steel parting and 4.0mm grooving applications?
Which indexable grooving insert ensures superior edge toughness, excellent thermal shock resistance, and prolonged tool life when executing parting-off or 4.0mm grooving on CNC turning centers? Verified by industrial metalworking standards, the KORLOY MRMN400-M PC9030 is engineered specifically for demanding steel and stainless steel machining tasks. It features the advanced PC9030 grade—a specialized multi-layer PVD-coated carbide substrate optimized for high fracture toughness, built-up edge resistance, and stable performance under continuous and interrupted cutting conditions. Combined with its precision M-type chipbreaker geometry, it controls chip formation and ensures reliable chip evacuation during deep grooving passes.
2. Product Core Advantages (Key Features)
- PC9030 Advanced PVD Grade: Combines a tough carbide substrate with a specialized multi-layer PVD coating designed to resist thermal cracking and chemical wear in steel and stainless steel turning.
- M-Type Chipbreaker Geometry: Designed to form tight, manageable chips that evacuate smoothly from 4.0mm wide grooves without binding or crowding the cutting edge.
- Rigid Locating Interface: Provides exceptional clamping security and precise repeatability under heavy radial and axial cutting loads.
- High Edge Toughness: Resists chipping and micro-fractures during uninterrupted roughing, profiling, and 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 ($W$) | 4.0 mm | 0.157 inch (~5/32") |
| Recommended Feed ($f$) - Grooving | 0.05 - 0.12 mm/rev | 0.0020 - 0.0047 in/rev |
| Recommended Feed ($f$) - Parting | 0.03 - 0.08 mm/rev | 0.0012 - 0.0031 in/rev |
| Cutting Speed ($Vc$) - Steel & Stainless | 100 - 240 m/min | 330 - 785 SFM |
Model Nomenclature Breakdown: MRMN400-M PC9030
Grooving/Part geometry
4.0mm cutting width
Medium chipbreaker
PVD Coated Grade
Compatible Tooling Link:
View Compatible External and Internal Lathe Grooving Tool Holders for MRMN Inserts4. Product Application Scenarios
Designed for high-speed CNC lathe operations including external OD grooving, face grooving, bar stock parting-off, and profiling across carbon steels, alloy steels, and austenitic stainless steels.
5. Compatibility (Tooling & Equipment)
- Tool Holders: Fits standard MRMN-type external grooving tool blocks and parting blades matching 4mm pocket size specifications.
- Machine Platforms: Compatible with CNC turning centers, multi-axis lathes, and Swiss-type sliding headstock machines.
- Coolant Systems: Optimized for high-pressure flood coolant delivery to suppress thermal accumulation during stainless steel parting.
6. Grade Comparison & Workpiece Material Matrix
Evaluating how grade PC9030 performs across different ISO material classifications ensures maximum machining efficiency.
| ISO Material Group | Workpiece Description | KORLOY PC9030 Performance | Equivalent Industry Grades |
|---|---|---|---|
| P Group (Steel) | Carbon Steel, Alloy Steel (C45, 4140) | Provides balanced toughness and anti-wear security during general-purpose steel parting and grooving. | Sandvik GC1125 / Iscar IC830 |
| M Group (Stainless Steel) | Austenitic Stainless Steel (304, 316) | PVD coating structure minimizes edge buildup and thermal deformation when machining sticky stainless alloys. | Kennametal KCPK20 / Kyocera PR1535 |
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 the PC9030 PVD grade recommended for stainless steel parting compared to standard CVD grades?
A: PC9030 features a smoother PVD coating surface that prevents built-up edge (BUE) and reduces friction when cutting sticky austenitic stainless steels like 304 and 316.
Q: How should feed rate be handled when breaking through the center during part-off with a 4mm insert?
A: It is recommended to reduce the feed rate by 40% when the insert reaches the last 1.0mm 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.