Korloy SCMT09T308-HMP PC9030 0.8mm Radius Stainless Steel Turning Insert (10pcs)
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The Original Korloy SCMT09T308-HMP PC9030 is a robust Square (7° Positive) Turning Insert, expertly engineered for high-efficiency Stainless Steel (M-Group) machining. Featuring a reinforced 0.8mm Corner Radius and Korloy's premier PC9030 PVD Coating, this insert excels in preventing built-up edge and thermal cracking. The -HMP (Highly Medium Performer) chipbreaker is optimized for semi-finishing to light-roughing, ensuring consistent chip control and an exceptional surface finish even under high-load conditions in materials like 304, 316, and duplex stainless steel.
Maximum Edge Security: The 0.8mm radius significantly increases the strength of the cutting tip compared to the 0.4mm version. This makes the SCMT09T308-HMP the preferred choice for interrupted cuts on stainless steel or when machining forged components with uneven surfaces.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SCMT09T308-HMP |
| Corner Radius | 0.8 mm (High Feed/Toughness) |
| Thickness / IC | 3.97 mm / 9.525 mm |
| Grade | PC9030 (PVD Specialty for Stainless) |
Core Performance Benefits:
- Durable 0.8mm Edge: Designed to withstand the "hammering" effect of interrupted cuts or high-feed turning in tough alloys.
- Advanced PVD Coating: Smooth TiAlN coating layer reduces friction, lowering heat generation at the tool-workpiece interface.
- Effective Chip Evacuation: The HMP geometry curls and breaks tough stainless steel chips effortlessly, preventing "long-wire" tangling in deep bores.
- Enhanced Tool Life: High resistance to crater and flank wear, crucial for long-run stainless steel production.
Recommended Cutting Parameters (Stainless Steel):
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304/316) | 90 - 160 m/min | 0.12 - 0.30 mm/rev | 0.8 - 2.8 mm |
| Martensitic (400 Series) | 110 - 200 m/min | 0.15 - 0.35 mm/rev | 0.8 - 3.5 mm |
| Heat Resistant Alloys | 30 - 60 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.0 mm |
Compatible Tool Holders:
Precision fit for standard 9.525mm IC tool holders and boring bars:
- External Turning Holders: SSDC 1616 / 2020 / 2525 Series
- Internal Boring Bars: S16Q-SSDC09 / S20R-SSDC09 / S25S-SSDC09
Machinist Tip: The Advantage of 0.8mm Radius in Stainless
Why the SCMT09T308 is the high-productivity choice for stainless:
Increased MRR. The 0.8mm radius allows you to increase your feed rate ($fn$) significantly. In stainless steel, a higher feed helps the tool cut through the work-hardened layer rather than rubbing against it.
Anti-Built-Up Edge. PC9030 is much better at preventing "gumming" than general-purpose grades. If you see material welding to the edge, switching to PC9030 is the solution.
Pro Advice: For the SCMT09T308-HMP, always ensure your depth of cut ($ap$) is at least 0.8mm (equal to the radius). This ensures the radial cutting forces are balanced and the chipbreaker engages correctly to prevent vibration.
Packaging: 10 pieces per box.
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