Korloy MGMN250-M PC9030 2.5mm Double-Ended Stainless Steel Grooving Insert (10pcs)
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The Original Korloy MGMN250-M PC9030 is a high-precision 2.5mm Double-Ended Grooving Insert specifically optimized for Stainless Steel and Difficult-to-Cut Materials. Featuring the industry-leading PC9030 PVD grade, this insert is designed to overcome the extreme heat and mechanical stress of machining Austenitic Stainless Steel (304, 316) and Super Alloys. The 2.5mm width offers enhanced structural stability compared to thinner inserts, making it perfect for deeper grooves and high-pressure cutting.
Superior Material Management: The MGMN250-M bridges the gap between material savings and tool rigidity. The PC9030 grade’s ultra-smooth PVD coating prevents Built-Up Edge (BUE), a common failure mode in stainless steel grooving.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN250-M |
| Insert Width (w) | 2.5 mm (+/- 0.03) |
| Grade | PC9030 (Premium Stainless Steel - PVD) |
| Target Materials | Stainless Steel (M), Heat Resistant Alloys (S) |
Core Performance Benefits:
- Enhanced Thermal Resistance: Specialized coating ensures the cutting edge stays sharp even under high-temperature friction.
- 2.5mm Rigid Profile: Minimizes tool vibration during deep radial plunging in tough alloys.
- Excellent Chip Control: The -M geometry curls chips effectively, preventing "bird-nesting" in deep grooves.
- Universal Versatility: While optimized for stainless steel, it also performs exceptionally well in low-carbon and alloy steels.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Stainless Steel (304/316) | 70 - 140 m/min | 0.06 - 0.14 mm/rev |
| Duplex Stainless Steel | 50 - 100 m/min | 0.05 - 0.12 mm/rev |
| Inconel / Titanium Alloys | 25 - 50 m/min | 0.04 - 0.10 mm/rev |
Compatible Tool Holders:
To maximize the efficiency of your 2.5mm insert, use the following high-precision holders:
- External Holders: MGEHR 1616-2.5 / 2020-2.5 / 2525-2.5
Stainless Steel Pro-Tip: PC9030 vs. PC5300
When grooving stainless steel, selecting the right coating is crucial for cost-per-part:
The Stainless Specialist. Optimized specifically for M-group materials. The coating is designed to handle chemical affinity and heat better than any other PVD grade.
The Universal Toughness. Great for interrupted cuts in steel. While it can cut stainless, it lacks the specific anti-built-up edge properties of PC9030.
Machinist's Pro Tip: For MGMN250-M PC9030 on 316 Stainless Steel, ensure you use a "peck grooving" cycle for deep cuts. This allows the coolant to reach the 2.5mm cutting zone and prevents the work-hardened material from damaging the insert during tool retraction.
Packaging: 10 pieces per box.
Korloy MGMN250-M PC9030 for 316 stainless, 2.5mm grooving tool for heat resistant alloy, MGMN250-M PC9030 cutting speed, parting off stainless steel with 2.5mm insert, best grooving grade for Inconel
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.