Korloy SNMG150608-GR NC3030 Heavy-Duty Roughing Insert for Steel (10pcs)
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The Original Korloy SNMG150608-GR NC3030 is the ultimate "Toughness Specialist" for the most demanding Steel (P-Group) turning tasks. Engineered with the NC3030 High-Toughness CVD Grade, this insert is specifically designed to survive where others fail: heavy interruptions, forged skins, and unstable machining conditions. The -GR (Roughing) chipbreaker features a reinforced cutting edge that can handle massive chip loads while maintaining structural integrity under high impact.
Maximum Impact Resistance: NC3030 is Korloy's toughest steel grade. If you are machining hexagonal bars, parts with keyways, or raw forgings with uneven surfaces, the combination of a 1506 thickness and the GR geometry provides the highest safety margin against breakage.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SNMG150608-GR |
| Corner Radius | 0.8 mm (Roughing Strength) |
| Insert Thickness | 6.35 mm (Heavy Duty 1506 Size) |
| Grade | NC3030 (Ultra-Tough CVD Coating) |
Core Performance Benefits:
- Shock Absorption: The specialized NC3030 substrate is designed to absorb mechanical shocks, preventing the catastrophic crack propagation common in harder grades.
- Reinforced GR Geometry: The heavy land on the -GR chipbreaker protects the edge during the most violent entries and exits in interrupted cuts.
- CVD Al2O3 Technology: Provides excellent heat protection, allowing for consistent tool life even during heavy-duty dry or wet machining.
- Thick Substrate Stability: The 1506 size offers more carbide "meat" than standard 1204 inserts, providing superior rigidity for large-diameter work.
Recommended Cutting Parameters (Heavy Duty Steel):
| Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (Roughing) | 140 - 260 m/min | 0.30 - 0.70 mm/rev | 2.0 - 8.0 mm |
| Alloy Steel (Forged) | 110 - 210 m/min | 0.25 - 0.60 mm/rev | 1.5 - 7.0 mm |
| Heavy Interruption | 80 - 150 m/min | 0.20 - 0.45 mm/rev | 1.5 - 5.0 mm |
Compatible Tool Holders:
Designed for 15.875mm (5/8") IC negative holders:
- External Roughing: MSSNR 2525M15 / 3232P15
Machinist Tip: Why choose NC3030?
Selecting the right CVD grade for steel turning:
Unbeatable Toughness. This is your "fire extinguisher." Use it when your inserts are chipping or shattering due to heavy interruptions or hard, scaly surfaces.
Speed & Versatility. Switch to NC3120 for general-purpose work or NC3020 for high-speed continuous cutting. NC3030 is slower but significantly more durable in violent cuts.
Pro Advice: When using the -GR chipbreaker, don't be afraid to push the depth of cut ($a_p$). This geometry is built to work hard—feeding too lightly can cause the insert to rub and lead to premature wear.
Packaging: 10 pieces per box.
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