Korloy TNMG160412-HS PC9030 (TNMG 333-HS) Large Radius Stainless Steel Insert (10pcs)
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The Original Korloy TNMG160412-HS PC9030 (ANSI: TNMG 333-HS) is a robust PVD Coated Semi-Finishing Insert engineered for Stainless Steel (M-Group) and High-Temp Alloys. Featuring the elite PC9030 Grade and an oversized 1.2mm (3/64") corner radius, this insert provides the ultimate edge security. The HS (High-Sharpness) geometry ensures that despite the large radius, the cutting action remains crisp, preventing the heat build-up and work-hardening typical of 304 and 316 stainless steel.
Maximize Productivity & Strength: When 0.4mm or 0.8mm inserts chip under pressure, the 1.2mm radius of the TNMG160412-HS provides the necessary reinforcement. It is specifically designed for large-diameter stainless shafts and applications where a higher feed rate is required to reduce cycle times while maintaining excellent surface integrity.
Technical Specifications (Metric & Imperial):
| ISO Designation | TNMG 160412-HS |
| ANSI Designation | TNMG 333-HS |
| Inscribed Circle (IC) | 9.525 mm / (3/8") |
| Thickness (S) | 4.76 mm / (3/16") |
| Corner Radius (r) | 1.2 mm / (3/64") |
| Grade | PC9030 (Premium Stainless Specialist PVD) |
Core Performance Benefits:
- Exceptional Edge Security: The R1.2 radius dissipates cutting heat and mechanical force over a larger area, preventing premature tip failure.
- PVD TiAlN Nano-Coating: High chemical stability reduces friction and prevents "smearing" on stainless surfaces.
- HS Geometry Advantage: Keeps cutting forces low even at larger radii, reducing the risk of vibration on rigid machines.
- Higher Feed Capability: Allows for faster table feeds compared to 0.4/0.8mm inserts, significantly cutting down production time.
Recommended Cutting Parameters:
| Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| 300 Series Stainless | 90-180 m/min | 0.20-0.45 mm/rev | 1.0-3.5 mm |
| Duplex Stainless | 50-110 m/min | 0.18-0.35 mm/rev | 0.8-3.0 mm |
Compatible Tooling Systems:
Works with all standard TNMG 16-size (3-size ANSI) negative tool holders:
- External Holders: MTJNR 2020K16 / MTJNR 2525M16 (ANSI 12-4B / 16-4D)
- Rigid Boring Bars: S32T-WTJNR16 / S40U-WTJNR16
Machinist Tip: The R1.2 Radius Secret
When to switch to a TNMG160412-HS:
Maximum Durability. Use this when your 0.8mm inserts are burning out too fast. The larger 1.2mm radius is much tougher against the notched wear caused by the hard "skin" of stainless steel castings or forged bars.
Large radii create more radial force. Only use R1.2 on stable setups. If you are machining a long, thin shaft without a steady rest, stay with TNMG160404-HS to avoid chatter.
Pro Advice: For a high-productivity "wiper-like" effect, use a feed rate of 0.35mm/rev. The 1.2mm radius will smooth out the feed marks, giving you a semi-finish quality at roughing speeds.
Packaging: 10 pieces per box.
TNMG 160412-HS for stainless semi-finishing, best insert for interrupted stainless cuts, Korloy PC9030 R1.2 cutting parameters, TNMG 333-HS for 316 stainless steel, high feed rate stainless turning inserts
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.