Korloy MGMN250-G PC9030 2.5mm Double-Ended Grooving Insert for Stainless Steel (10pcs)
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The Original Korloy MGMN250-G PC9030 is a high-performance 2.5mm Double-Ended Grooving Insert engineered specifically for the rigorous demands of Stainless Steel and Heat-Resistant Alloys. When precision and material economy are equally important, the 2.5mm intermediate width provides superior stability over narrower inserts. The PC9030 PVD grade features an ultra-smooth nano-structure TiAlN coating that prevents material welding (built-up edge) and ensures a superior surface finish on gummy materials like 304, 316, and Duplex stainless steels.
The Stainless Solution: Stainless steel machining is notorious for work-hardening and excessive heat. The PC9030 grade is optimized with a sharp edge geometry and heat-resistant PVD coating to slice through work-hardened layers while maintaining tool integrity in deep grooves.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN250-G |
| Insert Width (w) | 2.5 mm |
| Grade | PC9030 (Premium PVD for Stainless) |
| Chipbreaker | -G (Reinforced Edge Geometry) |
Core Performance Benefits:
- Exceptional Kerf Control: The 2.5mm width offers significantly more rigidity than 1.5/2.0mm inserts, reducing tool deflection in deep radial cuts.
- Built-Up Edge Resistance: Specialized PVD coating minimizes friction, preventing the "sticking" effect common with stainless and low-carbon steels.
- Extended Tool Life: High thermal stability allows for consistent performance even during long-cycle parting-off of large diameter bars.
- Double-Ended Economy: Features two precision cutting edges to maximize your investment and reduce tool change downtime.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Stainless Steel (304/316) | 80 - 150 m/min | 0.05 - 0.13 mm/rev |
| High-Temp Alloys (Inconel) | 25 - 55 m/min | 0.04 - 0.09 mm/rev |
| Mild Sticky Steel | 100 - 180 m/min | 0.06 - 0.15 mm/rev |
Compatible Tool Holders:
Pairs perfectly with dedicated 2.5mm width MGEHR/L external holders:
- External Holders: MGEHR 1616-2.5 / 2020-2.5 / 2525-2.5
Strategic Tip: PC9030 vs. NC3120
While both can cut steel, the coating technology defines their best use:
The Stainless Expert. PVD coating. Thinner and sharper. Best for materials that "stick" or work-harden easily. Essential for 300-series stainless.
The Steel Experts. CVD coating. Thicker and better for high-speed heat resistance in standard carbon and alloy steels.
Machinist's Pro Tip: For the MGMN250-G PC9030, when grooving stainless steel, avoid dwelling at the bottom of the cut. The 2.5mm blade is strong, but heat builds up quickly in SS—ensure your coolant flow is aggressive and aimed directly at the cutting edge.
Packaging: 10 pieces per box.
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