Korloy SCMT120404-C25 PC9030 Stainless Steel Turning Insert (10pcs)
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The Original Korloy SCMT120404-C25 PC9030 is a heavy-duty Square (7° Positive) Turning Insert, specifically engineered for the challenges of Stainless Steel (M-Group) machining. Featuring the advanced PC9030 PVD Grade, this insert offers a specialized TiAlN coating that provides superior resistance to built-up edge and thermal cracking. The -C25 Chipbreaker is reinforced for medium-to-roughing operations, ensuring reliable chip evacuation in "gummy" materials like 304 and 316 stainless steel.
Dominate Stainless Steel: Stainless steel is known for work-hardening and adhesive wear. The PC9030 grade is formulated with a high-toughness substrate and a smooth PVD layer that prevents material from "welding" to the cutting edge, drastically extending tool life compared to general-purpose inserts.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SCMT120404-C25 |
| Inscribed Circle (IC) | 12.7 mm |
| Thickness / Corner Radius | 4.76 mm / 0.4 mm |
| Grade | PC9030 (PVD Specialty for Stainless) |
Core Performance Benefits:
- Anti-Adhesive PVD Coating: Specially designed to reduce friction and prevent built-up edge in ductile and "sticky" stainless steels.
- Optimized -C25 Geometry: Specifically tuned to break tough stainless steel chips, preventing "long-wire" entanglements.
- High Thermal Shock Resistance: The PC9030 substrate handles the rapid heating and cooling of wet-cutting cycles without micro-cracking.
- Structural Strength: The SCMT1204 size provides the rigidity needed for deep internal boring and external turning of large stainless components.
Recommended Cutting Parameters (Stainless Steel):
| Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304/316) | 100 - 180 m/min | 0.10 - 0.30 mm/rev | 0.5 - 3.5 mm |
| Martensitic (420/440C) | 110 - 200 m/min | 0.12 - 0.35 mm/rev | 0.8 - 4.0 mm |
| Duplex Stainless Steel | 60 - 120 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
Compatible Tool Holders:
Ensure maximum stability with 12mm square pocket holders:
- External Holders: SSDC 2020 / 2525 Series
- Boring Bars (Internal): S25S-SSDC12 / S32T-SSDC12 Series
Machinist Tip: PC9030 vs PC5300 for Stainless
Choosing the right PVD grade for your stainless steel project:
Anti-Stick King. PC9030 is specifically designed to stop "built-up edge." If your 304 stainless is sticking to the tool and causing chip outs, this is the solution.
The Generalist. Use PC5300 if you are cutting a mix of steel and stainless. It is tougher for interrupted cuts but will wear faster than PC9030 in pure stainless production.
Pro Advice: When turning stainless steel with SCMT120404-C25 PC9030, always use plenty of high-quality coolant. This helps in cooling the cutting edge and lubricating the chip flow to prevent work hardening of the workpiece.
Packaging: 10 pieces per box.
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