Korloy CCMT120404-HMP PC9030 Large Stainless Steel Turning Insert (10pcs)
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The Original Korloy CCMT120404-HMP PC9030 represents the peak of stability for high-precision stainless steel turning on larger workpieces. As the largest in the CCMT family, the size-12 substrate provides maximum heat dissipation and structural rigidity. Combined with Korloy's industry-leading PVD coating (PC9030), this insert is engineered to eliminate built-up edge and deliver a mirror-like finish on tough materials like 304, 316, and duplex stainless steel.
Stability Guide: Machining large diameters or deep bores? Learn how to choose the right insert size: CCMT06 vs 09 vs 12: Stability Explained.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CCMT120404-HMP |
| Grade | PC9030 (PVD Stainless Specialist) |
| Nose Radius | 0.4 mm (Precision Finishing) |
| Material Suitability | All Stainless Steels (M10-M25) |
Core Performance Benefits:
- Maximum Rigidness: The 12mm size is ideal for larger boring bars and external holders, minimizing tool deflection in heavy-duty stainless finishing.
- Advanced Thermal Barrier: PC9030 PVD coating maintains edge sharpness while resisting the extreme heat generated by machining gummy stainless alloys.
- HMP Chipbreaker: Specifically designed for stainless steel, ensuring small, manageable chips even at light depths of cut, preventing workpiece scratching.
- Precision R0.4 Radius: Delivers exceptional surface smoothness while providing more edge strength than micro-radii.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic Stainless (304/316) | 110 - 190 m/min | 0.08 - 0.22 mm/rev | 0.5 - 2.5 mm |
| Duplex / PH Stainless | 60 - 120 m/min | 0.06 - 0.18 mm/rev | 0.5 - 2.0 mm |
Compatible Tool Holders:
Due to its size, this insert is paired with heavy-duty SCLCR/L type holders to handle larger torque:
- External Turning: SCLCR2020K12 / SCLCR2525M12
- Boring Bars (Internal): S25S-SCLCR12 / S32T-SCLCR12
Stainless Specialist: PC9030 vs. PC5300
Optimizing your tool life in stainless steel:
Primary choice for continuous finishing and precision boring. Highest surface quality.
Better for interrupted cuts, scaly surfaces, or manual lathes with less rigidity.
Machinist's Tip: For the CCMT12 size, ensure your tool holder is in good condition, as the increased leverage can magnify any shank wear.
Packaging: 10 pieces per box.