Korloy SNMG120404-HM NC3030 Tough Steel Turning Insert (10pcs)
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The Original Korloy SNMG120404-HM NC3030 is a heavy-duty Double-Sided Square Turning Insert engineered for Steel (P-Group) applications where toughness is the priority. Featuring the advanced NC3030 CVD Grade, this insert is specifically optimized for interrupted cuts, rough surfaces, and unstable machining conditions. The -HM (Highly Medium) chipbreaker provides a reinforced edge profile that effectively manages chips during medium-to-heavy removal passes, ensuring process security in carbon and alloy steels.
Superior Impact Resistance: If your job involves machining hexagonal bars, parts with keyways, or raw forged steel, the NC3030 grade is your best defense against edge chipping. Its enhanced substrate toughness absorbs the shock of repeated impacts better than any other standard CVD grade.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SNMG120404-HM |
| Corner Radius | 0.4 mm (High Precision / Low Pressure) |
| Edges | 8 Edges (Double-Sided Design) |
| Grade | NC3030 (Ultra-Tough CVD for Steel) |
Core Performance Benefits:
- Shock-Absorbing Substrate: Specifically formulated to prevent edge fracture during the most demanding interrupted cuts.
- Advanced CVD Thermal Shield: Multi-layer coating prevents heat deformation and allows for consistent performance in dry or wet cutting.
- Reinforced HM Geometry: The land area on the cutting edge is widened to provide maximum support under high-pressure loads.
- Unbeatable Cost Efficiency: 8 usable edges per insert provide the lowest cost-per-cut for industrial steel fabrication.
Recommended Cutting Parameters (Heavy Duty Steel):
| Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (Rough Surface) | 120 - 250 m/min | 0.15 - 0.35 mm/rev | 1.0 - 4.5 mm |
| Alloy Steel (Interrupted) | 100 - 200 m/min | 0.12 - 0.30 mm/rev | 0.8 - 3.5 mm |
| Structural Steel (A36) | 140 - 280 m/min | 0.15 - 0.40 mm/rev | 1.0 - 5.0 mm |
Compatible Tool Holders:
Universal fit for standard negative 12.7mm (1/2") IC holders:
- External Turning: MSSNR 2525M12 / 3232P12
- Internal Boring Bars: S25S-MSSNR12 / S32T-MSSNR12
Machinist Tip: NC3030 vs. NC3020
When to switch to the tougher NC3030 grade:
Safety First. Best for interrupted cuts and unstable machine setups. It prioritizes toughness over speed to prevent catastrophic tool failure in difficult conditions.
Productivity First. Best for stable, continuous cutting at high speeds. It lasts longer in clean steel but might chip if it hits a hard spot or a keyway.
Pro Advice: When using SNMG120404-HM NC3030 for interrupted cuts, ensure you use a "Top Clamp" style tool holder (like PSSKNR). This provides the most rigid clamping force to prevent the insert from vibrating during impact.
Packaging: 10 pieces per box.
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