Korloy MGMN250-M NC3030 2.5mm Double-Ended Tough Steel Grooving Insert (10pcs)
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The Original Korloy MGMN250-M NC3030 is a high-toughness 2.5mm Double-Ended Grooving Insert specifically engineered for Steel Parting and Grooving under Demanding Conditions. While thinner inserts might struggle with lateral forces, the 2.5mm width offers enhanced stability. The NC3030 CVD grade is optimized for impact resistance, making it the premier choice for machining carbon steels and alloy steels where interrupted cuts, scale, or vibrations are present.
Built for the Real World: NC3030 is designed to survive where other inserts fail. Its multi-layer CVD coating acts as a thermal and mechanical shield, allowing the insert to handle the repetitive shocks of interrupted grooving (like hex bars or keyed shafts) without premature edge failure.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN250-M |
| Insert Width (w) | 2.5 mm |
| Grade | NC3030 (Maximum Toughness CVD) |
| Chipbreaker | -M (Stable for Medium Feeds) |
Core Performance Benefits:
- Shock Absorption: The specialized carbide substrate is designed to prevent sudden breakage during interrupted cuts or unstable setups.
- Thick CVD Coating: Provides excellent resistance to flank wear and crater wear at medium cutting speeds.
- Enhanced Rigidity: The 2.5mm width bridges the gap between material economy and structural strength, reducing tool deflection.
- Double-Ended ROI: Two usable cutting edges ensure you get the maximum value out of every insert.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Low Carbon Steel (1018/1020) | 90 - 180 m/min | 0.06 - 0.16 mm/rev |
| Alloy Steel (4140/4340) | 70 - 150 m/min | 0.05 - 0.14 mm/rev |
| Forged Steel / Cast Steel | 60 - 130 m/min | 0.06 - 0.12 mm/rev |
Compatible Tool Holders:
Must be used with dedicated 2.5mm width MGEHR/L holders:
- External Holders: MGEHR 1616-2.5 / 2020-2.5 / 2525-2.5
The Toughness Shield: NC3030 vs. NC3120
For 2.5mm steel grooving, choosing the right "Armor" is critical:
The Tough One. Best for interrupted cuts, heavy shocks, and manual lathes. It trades some high-speed wear resistance for maximum anti-breakage security.
The Balanced One. Best for continuous CNC cuts and higher speeds. Offers more wear resistance but is more brittle if the tool hits an interruption.
Machinist's Pro Tip: If your MGMN250-M NC3030 shows chipping on the edge, consider reducing your feed rate slightly or ensuring your coolant is hitting the pocket directly. If the insert is surviving but wearing out too fast on the sides, try moving to the NC3120 grade.
Packaging: 10 pieces per box.
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