Korloy CCMT09T302-HMP NC3220 Precision Steel Finishing Insert (10pcs)
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The Original Korloy CCMT09T302-HMP NC3220 is a specialized turning insert engineered for high-precision finishing on steel workpieces under challenging conditions. Featuring the upgraded NC3220 toughness-enhanced CVD coating and a sharp 0.2mm nose radius, this insert excels at maintaining exceptional surface finishes and dimensional accuracy even during light interrupted cuts.
Size Selection Guide: Need to know if Size 09 is right for your diameter? Read our CCMT06 vs 09 vs 12 Guide.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CCMT09T302-HMP |
| Grade | NC3220 (Enhanced Toughness CVD) |
| Nose Radius | 0.2 mm (Ultra-Precision Finishing) |
| Application | Steel Finishing, Precision Boring |
Core Performance Benefits:
- Superior Toughness (NC3220): Offers better edge security than NC3120, making it ideal for steels that tend to chip or for machines with slight vibrations.
- High Surface Integrity: The 0.2mm radius reduces radial cutting forces, minimizing chatter and ensuring a mirror-like finish on small diameters.
- Advanced CVD Coating: Provides excellent resistance to thermal shock and coating delamination, extending life during interrupted finishing passes.
- HMP Geometry: Optimized chip control at very low feed rates and shallow depths of cut.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel / Mild Steel | 140 - 300 m/min | 0.04 - 0.12 mm/rev | 0.1 - 1.2 mm |
| Alloy Steel / Die Steel | 100 - 220 m/min | 0.04 - 0.10 mm/rev | 0.1 - 1.0 mm |
Compatible Tool Holders:
Ensure maximum precision by pairing this insert with high-quality SCLCR/L type holders:
- External Turning: SCLCR1212H09 / SCLCR1616H09
- Boring Bars (Internal): S12M-SCLCR09 / S16Q-SCLCR09
Steel Grade Pro-Tip: NC3120 vs. NC3220
Which finishing grade should you choose?
Best for general steel finishing in stable setups at higher speeds.
Better for interrupted cuts, tougher alloys, and setups where edge chipping is a problem.
Machinist's Tip: If your R0.2 finishing insert chips during the cut, switch to this NC3220 for superior edge security.
Packaging: 10 pieces per box.