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
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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
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.