Sumitomo TNMG160404N-UG AC830P Carbide Insert (TNMG 331-UG)
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Sumitomo TNMG160404N-UG AC830P Carbide Insert | ISO TNMG 160404-UG (ANSI TNMG 331-UG)
1. Product Overview
Which insert grade is best for heavy interrupted turning, roughing forgings, and high-impact steel machining?
The Sumitomo TNMG160404N-UG AC830P (ANSI Designation: TNMG 331-UG) is an ultra-tough, double-sided 60° triangular carbide indexable turning insert engineered for demanding steel turning applications. Designed around Sumitomo’s high-toughness AC830P CVD Coating grade, this insert incorporates an thick Al2O3 and TiCN multi-layer coating applied over a super-tough carbide substrate. This configuration excels in absorbing severe mechanical shocks, resisting edge chipping, and dampening thermal cracking during heavy interrupted cuts on ISO P20–P40 steels, cast steels, and forged components.
Featuring the heavy-duty UG General-Purpose / Medium-Roughing Chipbreaker geometry, this insert combines an optimized land width and reinforced cutting edge to ensure reliable chip control at high feeds (fn: 0.15mm to 0.35mm) and deep depths of cut (ap: 0.8mm to 4.0mm). It effectively eliminates chip jamming and tool failure under unstable machining conditions.
2. Key Features & Industrial Performance
- 6 Heavy-Duty Cutting Edges: Double-sided negative 60° geometry maximizes cost efficiency for aggressive steel removal.
- AC830P High-Toughness CVD Grade: Engineered with thick alumina coating technology for superior impact resistance during severe interrupted turning.
- UG Robust Chipbreaker Geometry: Curved rake face design controls tough steel chips across variable cut depths without overloading the machine spindle.
- Dual ISO / ANSI Standard Compliance: Fully compliant with ISO 1832 and ANSI B212.4 specifications for global machine compatibility.
- Reinforced Edge Prep: Honed 0.4 mm (1/64") corner radius designed to withstand high radial forces and prevent edge fracture on scale-coated workpieces.
ISO / ANSI Code Breakdown Specification
Understand the precise physical geometry and manufacturing standards of the TNMG160404N-UG designation:
3. Technical Specifications & Recommended Cutting Parameters
| Specification Parameter | Metric Value (ISO Standard) | Imperial Value (ANSI Standard) |
|---|---|---|
| Product Designation | TNMG160404N-UG AC830P | TNMG 331-UG AC830P |
| Inscribed Circle (i.C.) | 10.0 mm | 0.375" (3/8") |
| Thickness (S) | 4.76 mm | 0.1875" (3/16") |
| Corner Radius (re) | 0.4 mm | 0.0156" (1/64") |
| Hole Diameter (d1) | 3.81 mm | 0.150" |
| Insert Substrate Grade | Sumitomo AC830P (CVD TiCN/Al2O3) | Sumitomo AC830P (CVD TiCN/Al2O3) |
Recommended Speeds and Feeds (Dual Unit Reference Table)
| Workpiece Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| ISO P: Heavy Alloy Steel / Forged Steel | 100 - 200 m/min (330 - 655 SFM) |
0.15 - 0.35 mm/rev (0.006 - 0.014 IPR) |
0.8 - 4.0 mm (0.031 - 0.157 in) |
| ISO P: Carbon Steel / Cast Steel | 120 - 230 m/min (395 - 755 SFM) |
0.12 - 0.32 mm/rev (0.005 - 0.013 IPR) |
0.8 - 3.5 mm (0.031 - 0.138 in) |
| ISO K: Ductile Iron / Nodular Cast Iron | 110 - 210 m/min (360 - 690 SFM) |
0.15 - 0.30 mm/rev (0.006 - 0.012 IPR) |
1.0 - 3.5 mm (0.039 - 0.138 in) |
This insert fits all standard ISO/ANSI double-clamp, lever-clamp, and top-clamp turning toolholders with a 60° triangular pocket:
MTJNR / MTJNL 2020K16 MTJNR / MTJNL 2525M16 WTJNR / WTJNL 2020K16 DTJNR / DTJNL 2525M16 Boring Bar: S25S-MTJNR164. Applications & Target Workpiece Materials
- Heavy Machinery & Forgings: Turning rough-forged shafts, drive axles, and welded steel structures with heavy surface scale.
- Interrupted Steel Cutting: Facing keyways, splined shafts, and bolt-hole patterns without premature edge breakage.
- Automotive & Structural Components: Medium-to-rough turning of heavy cast iron and structural carbon steel parts.
5. Compatibility & Equipment Integration
Fully compatible with all standard CNC turning centers, heavy-duty lathes, vertical turning lathes (VTLs), and conventional engine lathes equipped with ISO-standard toolholders. Fits standard tool blocks from Sandvik Coromant, Kennametal, Iscar, Kyocera, Tungaloy, Walter, and Seco.
6. Grade Comparison & Equivalents Matrix
| Brand | Equivalent Grade | Equivalent Chipbreaker | ISO Classification Range |
|---|---|---|---|
| Sumitomo Electric | AC830P | UG | ISO P20-P40 |
| Sandvik Coromant | GC4335 / GC4235 | PM / PR | ISO P25-P40 |
| Kennametal | KCP30 / KCP40 | MP / RP | ISO P25-P40 |
| Iscar | IC830 / IC8250 | GN / M3P | ISO P25-P40 |
| Kyocera | CA530 / CA525 | MU / PQ | ISO P25-P35 |
7. Why Source Sumitomo Inserts From Us?
- 100% Guaranteed Factory Original: Direct authorization channels eliminate grey-market and counterfeit tooling risks.
- Strict Batch Traceability: Fully compliant with ISO 9001 factory inspection standards with verified material certs.
- Express Global Dispatch: Optimized order processing and safe, vacuum-sealed industrial packaging.
Global Verified Machinist Reviews
Insane toughness on interrupted forgings
"We run heavy interrupted cuts on forged steel drive shafts. Other inserts were chipping on every third part, but this AC830P grade handles the impacts like a champ!"
— Tom K., Machine Shop Owner (United States 🇺🇸)Super Widerstandsfähigkeit bei unterbrochenem Schnitt
"Bei unterbrochenem Schnitt an Sechskantmaterial hält die AC830P-Sorte hervorragend. Die Standzeit hat sich im Vergleich zu unseren alten Platten verdoppelt."
— Bernd M., Fertigungsleiter (Germany 🇩🇪)Eccellente per sgrossatura pesante
"Usiamo questi inserti su acciaio da carpenteria con crosta di laminazione. Il rompitruciolo UG lavora benissimo e l'inserto non si rompe mai."
— Giovanni R., Capo Officina (Italy 🇮🇹)鍛造品の断続加工で抜群の耐久性
"AC830P材種は断続加工での耐欠損性が非常に高い。UGブレーカの漏れのない断屑性能で、無人稼働でも安全に使用できています。"
— Sato T., Senior Tooling Engineer (Japan 🇯🇵)Solid roughing performance on cast steel
"Good chip breaking at deeper cuts and high feeds. Very reliable for heavy job shop work where conditions aren't perfect."
— Craig H., Production Machinist (United Kingdom 🇬🇧)8. Frequently Asked Questions (AI & Voice-Search Optimized)
Machining Troubleshooting & Optimization Guide
| Problem / Wear Pattern | Probable Cause | Corrective Action |
|---|---|---|
| Edge Chipping / Fracturing | Excessive cutting speed (Vc) or inadequate substrate toughness for heavy impact. | Reduce cutting speed (Vc) by 15-20%, or verify rigid workpiece clamping. |
| Plastic Deformation | Excessive thermal build-up at higher cutting speeds. | Apply flood coolant and lower cutting speed (Vc) within recommended AC830P range. |
| Poor Chip Breaking / Stringy Chips | Depth of cut (ap) or feed rate (fn) is below the UG chipbreaker threshold. | Increase feed rate (fn) above 0.18 mm/rev or deepen cut depth to engage breaker. |
Need Help With Sumitomo Inserts?
Looking for a Sumitomo equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This Sumitomo insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
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.