Sumitomo TNMG160404N-SX AC830P Carbide Insert (TNMG 331-SX)
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Sumitomo TNMG160404N-SX AC830P Carbide Insert | ISO TNMG 160404-SX (ANSI TNMG 331-SX)
1. Product Overview
Which insert grade is best for medium-to-light steel turning, fine chip control, and heavy interrupted cutting?
The Sumitomo TNMG160404N-SX AC830P (ANSI Designation: TNMG 331-SX) is a high-performance, double-sided 60° triangular carbide indexable turning insert engineered for high-precision steel turning under unstable machining conditions. Formulated with Sumitomo’s tough AC830P CVD Coating grade, this insert features an optimized multi-layer Al2O3 and TiCN structure deposited over a high-toughness substrate. It delivers remarkable resistance to thermal cracking, edge chipping, and severe mechanical shock during interrupted cuts on ISO P20–P40 alloy steels and forged components.
Featuring the specialized SX Finishing to Light-Medium Chipbreaker geometry, this insert provides low cutting forces, sharp shearing action, and excellent chip breaking at lower feeds (fn: 0.10mm to 0.30mm) and light-to-medium depths of cut (ap: 0.5mm to 3.0mm), preventing stringy chips and surface marring on critical workpieces.
2. Key Features & Industrial Performance
- 6 Double-Sided Cutting Edges: Negative 60° triangular insert geometry maximizes cost efficiency and tool life per edge.
- AC830P High-Toughness CVD Grade: Advanced Al2O3/TiCN coating structure specifically formulated for interrupted steel cuts and heavy chatter resistance.
- SX Precision Chipbreaker Geometry: Designed with a sharp cutting edge and variable pocket slope for continuous chip evacuation during light-to-medium cutting.
- Dual ISO / ANSI Standard Compliance: Fully compliant with ISO 1832 and ANSI B212.4 international standard designations.
- Precision 0.4 mm (1/64") Radius: Ideal balance of fine surface finish capability, low radial force, and high edge strength under dynamic loads.
ISO / ANSI Code Breakdown Specification
Detailed geometric and structural breakdown of the TNMG160404N-SX designation:
3. Technical Specifications & Recommended Cutting Parameters
| Specification Parameter | Metric Value (ISO Standard) | Imperial Value (ANSI Standard) |
|---|---|---|
| Product Designation | TNMG160404N-SX AC830P | TNMG 331-SX 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: Alloy Steel / Forged Steel | 110 - 220 m/min (360 - 720 SFM) |
0.10 - 0.30 mm/rev (0.004 - 0.012 IPR) |
0.5 - 3.0 mm (0.020 - 0.118 in) |
| ISO P: Carbon Steel / Structural Steel | 130 - 250 m/min (425 - 820 SFM) |
0.08 - 0.28 mm/rev (0.003 - 0.011 IPR) |
0.5 - 2.5 mm (0.020 - 0.098 in) |
| ISO K: Ductile Iron / Nodular Iron | 120 - 220 m/min (390 - 720 SFM) |
0.10 - 0.25 mm/rev (0.004 - 0.010 IPR) |
0.8 - 2.5 mm (0.031 - 0.098 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
- Automotive Shafts & Pinions: Precision semi-finishing of turned steps and splines with interrupted cuts.
- Precision Mechanical Parts: Light-to-medium steel turning requiring strict surface finish control and burr-free edges.
- Structural Steel Components: General OD/ID turning on welded parts, tubes, and forged shafts.
5. Compatibility & Equipment Integration
Fully compatible with all standard CNC turning centers, automatic lathes, vertical VTLs, and manual engine lathes equipped with ISO-standard toolholders. Direct interchangeability with tool clamping systems 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 | SX | ISO P20-P40 |
| Sandvik Coromant | GC4335 / GC4235 | PM / SF | ISO P25-P40 |
| Kennametal | KCP30 / KCP40 | MS / MP | ISO P25-P40 |
| Iscar | IC830 / IC8250 | SM / F3P | ISO P25-P40 |
| Kyocera | CA530 / CA525 | XP / 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
Great chip control on light cuts
"The SX chipbreaker works amazingly well at lighter depths of cut where other roughing breakers fail to curl chips properly. Zero bird-nesting on 4140 steel!"
— Mark D., CNC Programmer (United States 🇺🇸)Perfekt für unterbrochene Schnitte bei geringer Schnitttiefe
"Sehr gute Standzeit bei Wellen mit Nuten. Die AC830P-Sorte verhindert Plattenbruch absolut zuverlässig."
— Hans W., Machining Supervisor (Germany 🇩🇪)Eccellente controllo del truciolo
"Spedizione rapida e inserti perfetti per finitura e medio taglio su acciai legati."
— Marco B., Workshop Lead (Italy 🇮🇹)断続加工でも欠けずに安定した面粗度
"SXブレーカの切れ味とAC830Pの耐衝撃性が高次元でバランスされています。自動盤での長時間の無人運転でも安心です。"
— Kenji M., Tooling Engineer (Japan 🇯🇵)Reliable performer for light-medium turning
"Clean cutting edge and excellent wear life on medium carbon steel shafts."
— Alex P., Production Manager (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 machine instability during heavy shock. | Reduce cutting speed (Vc) by 15-20% and check tool shank rigidity. |
| Plastic Deformation | Excessive cutting heat at elevated surface speeds. | Ensure high-pressure flood coolant delivery and reduce cutting speed. |
| Long Stringy Chips | Depth of cut (ap) or feed rate (fn) is below the SX chipbreaker working range. | Increase feed rate (fn) slightly above 0.12 mm/rev or deepen cut depth. |
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.