Korloy CNMG160608-HM NC3020 Steel Medium Roughing Insert (10pcs)
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The Original Korloy CNMG160608-HM NC3020 (ANSI Standard: CNMG 542) is a high-performance carbide insert designed for medium-to-heavy roughing of steel. With a thickness of 6.35mm, the 1606 series provides the extra structural strength required for large stock removal on medium and large CNC lathes. The HM chipbreaker is engineered with a stable cutting edge that provides excellent chip control at higher feed rates, while the NC3020 CVD coating ensures superior wear resistance during high-speed continuous cutting operations.
High-Speed Roughing: Unlike the 3030 grade which prioritizes toughness, the NC3020 grade allows for significantly higher cutting speeds (Vc), making it the ideal choice for maximizing productivity in stable steel turning.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG160608-HM |
| ANSI Code | CNMG 542 |
| Grade | NC3020 (Universal High-Speed Steel Grade) |
| Chipbreaker | HM (Medium Roughing) |
Core Performance Benefits:
- Excellent Wear Resistance: Advanced CVD coating technology provides a thick alumina layer for high thermal protection at high speeds.
- Enhanced Edge Stability: The HM geometry is reinforced to handle the high radial forces common in large-diameter steel turning.
- Superior Productivity: Optimized for high-speed continuous machining, reducing cycle times for carbon and alloy steels.
- Reliable Chip Breaking: The HM groove design prevents long, dangerous stringy chips even at substantial depths of cut.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (AISI 1045) | 160 - 320 m/min | 0.25 - 0.55 mm/rev | 2.0 - 6.0 mm |
| Alloy Steel (AISI 4140) | 140 - 280 m/min | 0.20 - 0.50 mm/rev | 1.5 - 5.0 mm |
| Mild Steel (A36) | 180 - 350 m/min | 0.25 - 0.60 mm/rev | 2.0 - 6.5 mm |
Compatible Tool Holders:
For heavy-duty applications, we recommend Double-Clamping (D-Type) holders for maximum insert security:
- External Roughing: MCLNR2525M16 / MCLNR3232P16
Steel Grade Choice: NC3020 vs. NC3030
How to choose the right CVD grade for your CNMG 542 inserts:
Best for stable, continuous cutting at high speeds. It offers longer tool life on clean, pre-machined surfaces.
Best for heavy interrupted cuts or parts with forged skin/scale. It sacrifice speed for extreme edge security.
Machinist's Pro Tip: If you are machining a large shaft with no interruptions, NC3020 will allow you to run up to 25% faster than NC3030, significantly cutting down production time.
Packaging: 10 pieces per box.