Korloy SCMT120408-HMP PC9030 Heavy-Duty Stainless Steel Turning Insert (10pcs)
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The Original Korloy SCMT120408-HMP PC9030 is a premium, heavy-duty Square (7° Positive) Turning Insert, specifically designed for large-scale Stainless Steel (M-Group) machining. Featuring a robust 0.8mm Corner Radius and the industry-leading PC9030 PVD Coating, this insert provides the ultimate combination of edge strength and anti-adhesive properties. The -HMP (Highly Medium Performer) chipbreaker is engineered for medium-to-roughing operations, ensuring reliable chip control even in the toughest austenitic and duplex stainless steels.
Dominate Difficult Materials: Large stainless steel components often cause excessive heat and tool pressure. The PC9030 grade features a high-toughness substrate and a specialized TiAlN PVD layer that acts as a thermal shield, preventing "built-up edge" and ensuring dimensional stability over long cutting cycles.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SCMT120408-HMP |
| Inscribed Circle (IC) | 12.7 mm |
| Corner Radius | 0.8 mm (Maximum Strength) |
| Grade | PC9030 (PVD Specialty for Stainless) |
Core Performance Benefits:
- Exceptional Edge Stability: The 0.8mm radius is significantly more resistant to chipping during interrupted cuts or when hitting heavy scale.
- Advanced PVD Technology: PC9030 coating reduces friction and heat buildup, extending tool life in work-hardening materials.
- Optimized HMP Chip Control: Designed to curl and break long, stringy stainless chips even at higher feed rates.
- High-Load Capability: The SCMT1204 size provides the structural integrity needed for large-diameter boring and heavy facing.
Recommended Cutting Parameters (Stainless Steel):
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304/316) | 90 - 170 m/min | 0.15 - 0.35 mm/rev | 1.0 - 4.5 mm |
| Martensitic (400 Series) | 110 - 200 m/min | 0.18 - 0.40 mm/rev | 1.0 - 5.0 mm |
| Duplex Stainless Steel | 50 - 110 m/min | 0.12 - 0.30 mm/rev | 0.8 - 3.5 mm |
Compatible Tool Holders:
Precision fit for heavy-duty 12.7mm IC tool pockets:
- External Holders: SSDC 2525 / 3232 / 4040 Series
- Internal Boring Bars: S32T-SSDC12 / S40U-SSDC12 / S50V-SSDC12
Machinist Tip: Why choose SCMT120408 for Stainless?
Optimizing results for large-scale stainless production:
The Stainless Expert. Unlike general-purpose grades, PC9030 is chemically stable against stainless steel, meaning fewer tool changes and more consistent part dimensions.
High Material Removal. The larger radius handles heat better and allows you to push the feed rate to the upper limits ($fn$ > 0.3mm), cutting right through the work-hardened surface.
Pro Advice: For the SCMT120408-HMP, ensure your coolant pressure is maximized. In heavy stainless steel turning, "flood" cooling is essential to prevent thermal shock and to help flush away the large chips generated by the 0.8mm radius.
Packaging: 10 pieces per box.
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