Korloy CNMG160608-HM NC3030 Heavy-Duty Steel Roughing Insert (10pcs)
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The Original Korloy CNMG160608-HM NC3030 (ANSI Standard: CNMG 542) is a powerhouse insert engineered for heavy-duty steel machining and roughing. The 1606 thickness (6.35mm) provides maximum structural integrity to withstand massive cutting forces. The HM (Medium Roughing) chipbreaker features a reinforced cutting edge that excels at breaking thick chips and managing heavy depths of cut. Combined with the NC3030 CVD grade, which is optimized for maximum toughness, this insert is the ultimate solution for interrupted cuts and rough surfaces on carbon and alloy steels.
Built for Strength: This is not a standard finishing tool. The CNMG1606 series is designed for large-scale production where reliability in heavy stock removal is the #1 priority.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG160608-HM |
| ANSI Code | CNMG 542 |
| Grade | NC3030 (High-Toughness CVD for Interrupted Cuts) |
| Thickness | 6.35 mm (Heavy Duty) |
Core Performance Benefits:
- Maximum Edge Reliability: NC3030 grade is the toughest in the Korloy steel series, preventing sudden chipping during heavy interruptions.
- Optimized for Stock Removal: HM chipbreaker handles deep passes (ap) while maintaining control over chip flow to protect the workpiece and tool.
- Superior Heat Shield: The thick Al2O3 CVD coating provides an excellent thermal barrier, allowing for extended tool life in high-temperature dry machining.
- Reinforced Geometry: The 0.8mm radius combined with a strong T-land prevents edge fracture during the first pass on rough forged surfaces.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (Roughing) | 120 - 250 m/min | 0.25 - 0.60 mm/rev | 2.0 - 7.0 mm |
| Alloy Steel (Interrupted) | 100 - 200 m/min | 0.20 - 0.50 mm/rev | 2.0 - 6.0 mm |
| Steel Castings | 80 - 180 m/min | 0.25 - 0.55 mm/rev | 1.5 - 6.0 mm |
Compatible Tool Holders:
Due to the 1606 size, ensure you use large-shank D-Type holders for maximum rigidity:
- External Roughing: MCLNR/L 2525M16 /MCLNR/L 3232P16
Steel Grade Choice: NC3030 vs. NC3020
Selecting the right CVD grade for roughing operations:
First choice for heavy interrupted cuts, forged skin, and machining parts with scale. It prioritizes impact resistance over speed.
Best for continuous cutting at higher speeds. Offers better wear resistance but is more likely to chip if hit by sudden interruptions.
Machinist's Pro Tip: When using the HM breaker, if the chips are not breaking properly, increase your feed rate. This geometry is designed to work under pressure; light feeding will lead to bird-nesting.
Packaging: 10 pieces per box.