Korloy TNMG160408-HM PC9030 (TNMG 332-HM) Stainless Steel Turning Insert (10pcs)
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The Original Korloy TNMG160408-HM PC9030 (ANSI: TNMG 332-HM) is a premier PVD Coated Triangular Turning Insert meticulously designed for Stainless Steel (M-Group) and Heat-Resistant Super Alloys (S-Group). Featuring the high-performance PC9030 PVD Grade, this insert provides a smooth, sharp edge that effectively counteracts the "gummy" nature of stainless steel. The HM Chipbreaker combined with a robust 0.8mm corner radius ensures superior chip breaking and edge reliability during medium-duty machining.
High Performance in Adhesive Materials: Stainless steels like 304 and 316 are prone to Built-Up Edge (BUE). PC9030’s advanced PVD coating reduces chemical affinity between the tool and the workpiece, ensuring clean cuts, extended tool life, and exceptional surface integrity.
Technical Specifications (Metric & Imperial):
| ISO Designation | TNMG 160408-HM |
| ANSI Designation | TNMG 332-HM |
| Inscribed Circle (IC) | 9.525 mm / (3/8") |
| Thickness (S) | 4.76 mm / (3/16") |
| Corner Radius (r) | 0.8 mm / (1/32") |
| Grade | PC9030 (Universal PVD Specialist) |
Core Performance Benefits:
- PVD TiAlN Nano-Coating: Excellent thermal stability and surface smoothness to prevent chip welding.
- Optimized HM Geometry: Specifically tuned for medium cutting, providing a balance between cutting force and chip control.
- Enhanced Edge Toughness: The 0.8mm (332) radius handles deeper cuts and provides high resistance to mechanical shock and vibration.
- Versatility: While king of the M-group, it is also a powerful problem-solver for carbon steels in low-speed or unstable setups.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304/316) | 100-200 m/min (330-650 sfm) | 0.15-0.35 mm/rev (.006-.014 ipr) | 0.8-3.5 mm (.032-.138") |
| Duplex Stainless Steel | 60-120 m/min (200-390 sfm) | 0.15-0.30 mm/rev (.006-.012 ipr) | 0.8-3.0 mm (.032-.118") |
Compatible Tooling Systems:
- Standard External Holders: MTJNR 2020K16 / MTJNR 2525M16 (ANSI 12-4B / 16-4D)
- Rigid Boring Bars: S25S-WTJNR16 / S32T-WTJNR16
Machinist Tip: Mastering Stainless Cuts
Optimizing the TNMG160408-HM PC9030:
The Safe Choice. PC9030 is designed for a broad window of speeds. If you are experiencing vibration or inconsistent material quality, PC9030 provides the necessary toughness to keep the edge intact.
If you are performing heavy interruptions or turning extremely tough Duplex alloys at low speeds, the PC9035 grade (extra toughness) might be required. For 90% of stainless jobs, PC9030 (this model) is the superior balance.
Pro Advice: The 0.8mm radius is the best "general purpose" size. However, ensure you maintain a feed rate (fn) at least 1/3 of the corner radius (approx. 0.25mm/rev) to ensure the chipbreaker engages correctly and keeps heat away from the workpiece.
Packaging: 10 pieces per box.
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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.