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