Korloy TNMG160408-GS PC9030 (TNMG 332-GS) Stainless Steel Turning Insert (10pcs)
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The Original Korloy TNMG160408-GS PC9030 (ANSI: TNMG 332-GS) is a heavy-duty, double-sided Triangular Indexable Insert designed for high-performance machining of Stainless Steel (M-Group) and Heat-Resistant Alloys. With a reinforced 0.8mm corner radius and 6 usable cutting edges, it offers maximum economy and edge strength. The PC9030 PVD Grade is Korloy’s flagship solution for anti-adhesion, while the GS Chipbreaker ensures smooth chip evacuation in demanding 304 and 316 stainless steel applications.
Robust Edge Design: The 0.8mm (1/32") radius provides significantly higher durability than the 0.4mm version. This makes the TNMG160408 ideal for semi-roughing, interrupted cuts, and handling the hard "scale" found on hot-rolled stainless stock.
Technical Specifications (Metric & Imperial):
| ISO Designation | TNMG 160408-GS |
| ANSI Designation | TNMG 332-GS |
| 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 (Premium PVD Coated) |
Core Performance Benefits:
- Enhanced Edge Security: The R0.8 radius resists chipping under heavy chip loads and vibrations.
- GS High-Efficiency Geometry: Specifically engineered to curl and break tough stainless chips, preventing bird-nesting on the spindle.
- Anti-Adhesion PC9030 Grade: The ultra-smooth PVD coating prevents "built-up edge," ensuring consistent dimensions throughout the run.
- Superior Economy: 6 cutting edges per insert provide the lowest cost-per-cut in high-volume stainless production.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Stainless (304/316) | 90-200 m/min (295-655 sfm) | 0.15-0.35 mm/rev (.006-.014 ipr) | 1.0-4.0 mm (.040-.157") |
| Duplex Steel | 50-120 m/min (165-395 sfm) | 0.15-0.30 mm/rev (.006-.012 ipr) | 1.0-3.0 mm (.040-.118") |
Compatible Tooling Systems:
- External Toolholders: MTJNR 2020K16 (MTJNR 12-4B) / MTJNR 2525M16 (MTJNR 16-4D)
- Heavy Boring Bars: S25S-WTJNR16 / S32T-WTJNR16
Machinist Tip: Efficiency vs Precision
When to choose the 0.8mm radius (TNMG160408):
The Workhorse. Choose this for the majority of your stainless work. It allows for higher feeds and is much more forgiving if the part has an uneven surface or if you are doing interrupted cutting.
The Detailer. Switch to the 0.4mm radius only for final finishing passes where you need to minimize cutting pressure on slender parts or achieve a very tight corner profile.
Pro Advice: For the best chip breaking with the GS geometry, ensure your feed rate (fn) is at least 0.15 mm/rev. At lower feeds, stainless steel tends to string out, regardless of the chipbreaker.
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.