Korloy SCMT120408-HMP PC9030 Heavy-Duty Stainless Steel Turning Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
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.
Korloy SCMT120408-HMP price, 0.8mm radius insert for 316 stainless steel, PC9030 vs PC5300 for heavy turning, SCMT 120408 cutting parameters stainless, heavy-duty boring bar inserts for stainless steel
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.