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
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.