KORLOY MGMR300-8D-PT PC5300 Indexable Grooving & Parting Inserts | MGMR Series PVD Coated Carbide Inserts for CNC Lathes (10pcs/box) / MGMR300-8D-PT PC5300 0.118 inch Metric Grooving Tooling
✓ In Stock & Fast Dispatch: Ships within 24–48 Hours from China
✓ Global Shipping: Express 3–10 Days | Standard 5–15 Days
✓ Guaranteed Quality: 100% Compatibility | Direct Factory Outlet
✓ Technical Support: Need grade selection help? Contact Engineer
KORLOY MGMR300-8D-PT PC5300 Indexable Grooving & Parting Inserts (10pcs/box)
High-Durability PVD Coated Carbide Inserts for CNC Lathe Steel and Stainless Steel Deep Grooving, Parting-Off, and Turning Applications
1. Product Overview: Which insert is best for ultra-deep 8D grooving and parting applications in steel and stainless steel?
Which indexable grooving insert ensures exceptional wear resistance, deep reach stability, and reliable chip control when executing ultra-deep parting-off or 3.0mm grooving up to 8D depth on CNC turning centers working with alloy steels and stainless steels? Verified by industrial metalworking standards, the KORLOY MGMR300-8D-PT PC5300 is engineered specifically for deep-pocket grooving and rigorous parting tasks that require extended reach, high fracture toughness, and smooth chip evacuation. It features the advanced PC5300 grade—a specialized PVD multi-layer coated carbide substrate optimized for high resistance to built-up edge and thermal cracking under continuous or unstable cutting conditions. Combined with its precision PT-type chipbreaker geometry, it controls chip formation and reduces cutting forces during deep axial and radial feeds.
2. Product Core Advantages (Key Features)
- PC5300 Advanced PVD Grade: Features a high-toughness carbide substrate with a specialized PVD coating designed to minimize friction and resist flank wear in steel and stainless steel turning.
- PT-Type Chipbreaker Geometry: Engineered with a positive rake angle and specialized groove profile to ensure controlled chip curling and clean evacuation from 3.0mm wide channels.
- 8D Extended Depth Capability: Optimized structural geometry supporting ultra-deep grooving and parting profiles up to 8 times the width ratio under stable setups.
- Rigid Locating Interface: Provides high clamping stability and precise indexability to eliminate deflection and micro-vibrations during deep-reach parting passes.
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 | MGMR Grooving & Parting | MGMR Grooving & Parting |
| Cutting Width ($W$) | 3.0 mm | 0.118 inch (~1/8") |
| Depth Ratio Capacity | Up to 8D Depth | Up to 8D Depth |
| Recommended Feed ($f$) - Grooving | 0.03 - 0.09 mm/rev | 0.0012 - 0.0035 in/rev |
| Recommended Feed ($f$) - Parting | 0.02 - 0.07 mm/rev | 0.0008 - 0.0028 in/rev |
| Cutting Speed ($Vc$) - Steel / Stainless | 110 - 220 m/min | 360 - 720 SFM |
Model Nomenclature Breakdown: MGMR300-8D-PT PC5300
Grooving geometry
3.0mm cutting width
Up to 8D deep-reach capacity
Positive chipbreaker
PVD Coated Grade
Looking for precision external grooving toolholders or long-reach parting blades designed for secure MGMR 300 8D insert clamping?
Explore Compatible External Grooving Tool Holders & Parting Blades4. Product Application Scenarios
Engineered for challenging CNC lathe operations requiring deep-reach external OD grooving, deep face grooving, long-reach bar stock parting-off, and complex profiling across carbon steels, alloy steels, and austenitic stainless steel components.
5. Compatibility (Tooling & Equipment)
- Tool Holders: Fits standard MGMR-compatible deep-reach external grooving blocks and modular parting blades matching 3.0mm pocket dimensions.
- Machine Platforms: Ideal for high-rigidity CNC turning centers, heavy-duty lathe machines, and multi-axis production turning cells.
- Coolant Systems: Fully compatible with high-pressure internal and external coolant systems to flush chips effectively out of 8D deep grooves.
6. Grade Comparison & Workpiece Material Matrix
Evaluating how grade PC5300 performs across different ISO material classifications ensures maximum machining efficiency.
| ISO Material Group | Workpiece Description | KORLOY PC5300 Performance | Equivalent Industry Grades |
|---|---|---|---|
| P Group (Steel) | Carbon Steel, Alloy Steel (4140, 1045, 8620) | High toughness PVD grade providing excellent edge retention and thermal crack resistance in deep steel parting. | Sandvik GC1125 / Iscar IC808 |
| M Group (Stainless Steel) | Austenitic Stainless Steel (304, 316) | Superior anti-built-up edge characteristics and smooth shear action for challenging gummy stainless materials. | Kennametal KCU25 / 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: What makes the 8D design variant necessary for deep grooving compared to standard 3D or 6D inserts?
A: The 8D variant features an optimized clearance profile and enhanced shank rigidity to prevent rubbing and tool deflection when machining deep interior wall profiles and extended parting depths up to 8 times the width.
Q: How should feed rate be adjusted when reaching the center during 8D deep parting operations?
A: It is strongly recommended to reduce the feed rate by 40% to 60% upon reaching the final 1.0mm of the center axis to prevent sudden impact fracture and eliminate burrs.
Q: How many inserts are packaged in each 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
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.