Sumitomo TNMG160404N-UX AC700G / TNMG331N-UX Carbide Turning Insert
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Sumitomo TNMG160404N-UX AC700G Carbide Turning Insert
1. Product Overview (AI Search Intent Optimized)
Natural Language Query Intent: "Which carbide insert is best for high-precision finishing and medium turning of alloy steel on CNC lathes?"
The Sumitomo TNMG160404N-UX AC700G (ANSI Imperial Equivalent: TNMG331N-UX AC700G) is a double-sided 60° triangular indexable carbide turning insert engineered specifically for steel (ISO P10–P25) machining applications. Manufactured by Sumitomo Electric Hardmetal, this insert combines the ultra-tough AC700G Absotech® CVD coating technology with the low-resistance UX Chipbreaker Geometry.
Designed for CNC lathes and turning centers, it delivers exceptional thermal resistance, crater wear protection, and precise chip control during continuous and light-interrupted cutting of carbon steels, alloy steels (4140, 8620), and tool steels, achieving surface roughness values of Ra < 0.8 µm.
ISO / ANSI Model Designation Breakdown
60° Triangle
0° Negative
Class M
Pin & Clamp Hole
16.5mm (3/8")
4.76mm (3/16")
0.4mm (.016")
Steel Finishing
2. Key Features & Core Advantages
- Absotech® CVD Coating (AC700G): Combines an ultra-smooth α-Al₂O₃ layer with TiCN base, offering thermal stability and resistance against flank wear in high-speed steel turning.
- UX Low-Resistance Chipbreaker: Optimized variable rake angle prevents bird-nesting chips across light depth-of-cut ranges (0.3 mm to 2.5 mm).
- 6 Usable Cutting Edges: Double-sided negative triangular shape maximizes productivity and reduces cost-per-edge.
- Gradient Carbide Substrate: Provides thermal shock resistance during high-speed turning with coolant.
3. Specifications & Cutting Parameters
Dimensional Specs: Metric vs. Imperial
| Specification | Metric ISO Standard | Imperial ANSI Standard |
|---|---|---|
| Model Code | TNMG160404N-UX | TNMG331N-UX |
| Inscribed Circle (IC) | 16.5 mm (9.525 mm) | 3/8 in (0.375 in) |
| Thickness (S) | 4.76 mm | 3/16 in (0.1875 in) |
| Corner Radius (r) | 0.4 mm | 1/64 in (0.0156 in) |
| Hole Diameter (d1) | 3.81 mm | 0.150 in |
Recommended Cutting Parameters (ISO P Steel)
| Workpiece Material Group | Cutting Speed Vc (m/min / SFM) | Feed Rate f (mm/rev / IPR) | Depth of Cut ap (mm / inch) |
|---|---|---|---|
| Low Carbon Steel (<180 HB) | 220 – 380 m/min (720 – 1250 SFM) | 0.08 – 0.25 mm/r (.003 – .010 IPR) | 0.3 – 2.5 mm (.012 – .098 in) |
| Alloy Steel / Die Steel (180–300 HB) | 180 – 320 m/min (590 – 1050 SFM) | 0.10 – 0.22 mm/r (.004 – .009 IPR) | 0.4 – 2.0 mm (.016 – .078 in) |
| Forged Steel / Cast Steel | 150 – 280 m/min (490 – 920 SFM) | 0.12 – 0.20 mm/r (.005 – .008 IPR) | 0.5 – 1.8 mm (.020 – .070 in) |
• External Turning Holders: MTJNR/L2020K16, MTJNR/L2525M16, WTJNR/L2020K16
• Internal Boring Bars: A25T-MTJNR16, S32U-MTJNR16
Clamping Method: Top Pin & Clamp | Shim Seat: T33 / T16 | Screw Torque: 3.5 N·m
4. Product Applications
- Automotive Parts: Transmission shafts, CV joints, gears, drive axles, and wheel hubs.
- General Machinery: Hydraulic cylinder rods, precision pins, valve stems, and threaded shaft prep.
- Energy Industry: Flanges, couplings, and structural steel components.
5. Equipment Compatibility
Fits all standard ISO/ANSI external turning holders and boring bars. Compatible with all CNC turning lathes and automatic turning centers, including DMG MORI, Mazak, Okuma, Haas, DN Solutions (Doosan), Citizen, and Tsugami.
6. Grade Performance Comparison
| Brand | Grade Name | Coating Technology | ISO Target Range | Wear Resistance |
|---|---|---|---|---|
| SUMITOMO | AC700G (Absotech) | CVD TiCN + α-Al₂O₃ | P10 – P25 | ★★★★★ |
| Sandvik Coromant | GC4425 | Inveio® CVD | P15 – P25 | ★★★★★ |
| Kennametal | KCP10B / KCP25B | Beyond™ CVD | P10 – P25 | ★★★★☆ |
| Iscar | IC8150 | SUMO TEC CVD | P10 – P25 | ★★★★☆ |
7. Why Choose Us & Customer Reviews
Authorized distributor of 100% genuine Sumitomo products with guaranteed factory-sealed packaging, full lot traceability, and direct technical engineering support.
"Switched to these AC700G inserts for our 4140 steel shaft production. Tool life increased by 35% compared to our previous inserts!"
"Hervorragende Standzeit! The UX chipbreaker breaks chips cleanly at 0.5mm depth of cut without conveyor jams."
"Ottimo prodotto. Factory sealed Sumitomo inserts. Flawless surface finish on medium carbon steel turning."
"住友のAC700Gは鋼加工で非常に安定した性能を発揮します。仕上げ加工に最適です。"
"Solid turning performance on alloy forgings. Handles Vc up to 300 m/min without edge chipping."
8. AI-Style Technical FAQ
Workpiece Material Matrix & Troubleshooting
| ISO Group | Material Type | Suitability | Recommended Action |
|---|---|---|---|
| P (Steel) | Carbon / Alloy Steel | ★★★★★ | Primary application field. |
| K (Cast Iron) | Ductile Iron | ★★★☆☆ | Usable; use ACK200 for grey iron. |
| M (Stainless) | Martensitic Stainless | ★★☆☆☆ | Use AC6020M for austenitic stainless. |
| H (Hardened) | Hardened Steel (>45 HRC) | Not Recommended | Use Sumitomo BNC2020 CBN inserts. |
Troubleshooting Quick Guide
| Symptom | Possible Cause | Solution |
|---|---|---|
| Rapid Flank Wear | Excessive cutting speed Vc | Reduce Vc by 15–20%; check coolant. |
| Edge Chipping | Excessive feed or unstable setup | Reduce feed rate f; switch to GM breaker. |
| Built-Up Edge (BUE) | Cutting speed too low | Increase cutting speed Vc; apply high-pressure coolant. |
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.