Korloy MGMN250-T PC5300 2.5mm Double-Ended Universal Steel Grooving Insert (10pcs)
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The Original Korloy MGMN250-T PC5300 is a specialized 2.5mm Double-Ended Grooving Insert engineered for maximum edge toughness. When a 2.0mm insert is too fragile and a 3.0mm insert wastes too much material, the 2.5mm width provides the perfect middle ground for stability and efficiency. Featuring the -T (Tough) chipbreaker and the premium PC5300 PVD grade, this insert is the professional's choice for overcoming chipping in interrupted cuts and hardened steel applications.
Superior Edge Reinforcement: The MGMN250-T is designed with a more robust cutting edge compared to standard geometries. This makes it exceptionally resistant to the shock loads encountered when machining through holes, hex shafts, or scaly surfaces.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN250-T |
| Insert Width (w) | 2.5 mm (+/- 0.02) |
| Grade | PC5300 (Universal High-Toughness PVD) |
| Chipbreaker | -T (Reinforced for Toughness) |
Core Performance Benefits:
- Shock Absorption: The specialized substrate of PC5300 absorbs impacts, preventing micro-cracking in interrupted grooving.
- Balanced 2.5mm Profile: Offers better rigidity than 2.0mm inserts while maintaining high material economy.
- Thermal Stability: Advanced PVD coating protects the tool from heat buildup during heavy-duty cutting.
- Versatile Application: One grade for multiple materials, including Carbon Steel, Alloy Steel, and Stainless Steel.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (P1-P3) | 100 - 180 m/min | 0.06 - 0.15 mm/rev |
| Alloy Steel (40Cr/42CrMo) | 80 - 150 m/min | 0.05 - 0.12 mm/rev |
| Stainless Steel (304/316) | 70 - 130 m/min | 0.04 - 0.10 mm/rev |
Compatible Tool Holders:
For high-rigidity setup with 2.5mm inserts, use the following holders:
- External Holders: MGEHR 1616-2.5 / 2020-2.5 / 2525-2.5
The 2.5mm Advantage: MGMN250-T vs. 2.0mm Inserts
Why switch to a 2.5mm MGMN250-T from a standard 2.0mm insert?
The Toughness Specialist. The extra 0.5mm width and reinforced -T geometry significantly increase tool life in deep radial grooves or when cutting across holes. It stops the "snapping" common in 2.0mm widths.
The Material Savers. While they minimize kerf loss, they often lack the structural strength for high-torque applications or heavy interrupted cuts in tough alloys.
Machinist's Pro Tip: For MGMN250-T PC5300, if you encounter tool vibration, try increasing the feed rate ($f$) slightly. This forces the tool to "bite" into the material, utilizing the reinforced -T edge to stabilize the cut.
Packaging: 10 pieces per box.
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