SUMITOMO TNMG160412N-GU AC830P Carbide Turning Insert (TNMG 333-GU)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
SUMITOMO TNMG160412N-GU AC830P Carbide Turning Insert (TNMG 333-GU)
1. Product Overview
"Which double-sided carbide turning insert provides the longest tool life and best chip control for heavy interrupted roughing of carbon and alloy steels on CNC lathes?"
The SUMITOMO TNMG160412N-GU AC830P is an industrial-grade indexable cutting tool purpose-built to eliminate thermal cracking and notch wear challenges in high-efficiency steel turning. Featuring a double-sided negative 60° triangular design, it delivers 6 highly economical cutting edges. Optimized with Sumitomo’s legendary AC830P Super CVD Coating Technology, this insert provides an exceptional thermal barrier against plastic deformation under extreme dry machining environments. Simultaneously, the GU General-Purpose to Roughing Chipbreaker Geometry leverages a unique variable rake-angle profile to ensure continuous, predictable chip evacuation during deep depth-of-cut (DOC) longitudinal sequences and heavy profile facing.
Strict ISO / ANSI Cutting Tool Standard Alphanumeric Decoding Matrix
2. Product Key Features & Engineering Benefits
- Absolut-CVD Multi-Layer Coating (Grade AC830P): Formulated with a highly textured Al2O3 and thick TiCN crystalline orientation matrix that doubles chipping resistance under heavy thermal impact during roughing cuts.
- Advanced GU Multi-Application Chipbreaker: Optimized with a wide chip pocket land that forces long-chipping ductile steels into compact 6-shaped curls, avoiding catastrophic bird-nesting on the CNC spindle.
- 6 Economical Edge Profiles: The negative 0° clearance architecture delivers exceptional core stability while lowering corporate tool consumption overhead relative to single-sided alternatives.
- Reinforced 1.2mm Nose Corner Radius: Provides high localized edge rigidity, drastically minimizing notch wear propagation and chipping during erratic scale-line scaling.
3. Technical Specifications & Mechanical Parameters
| Dimensional Architecture | Metric Value Standards (ISO) | Imperial Value Standards (ANSI Equivalent) |
|---|---|---|
| Standard Product Coding | TNMG160412N-GU AC830P | TNMG 333-GU AC830P |
| Inscribed Circle (IC) | 9.525 mm | 0.375 inches (3/8") |
| Effective Cutting Edge Length | 16.5 mm | 0.650 inches |
| Total Insert Thickness | 4.76 mm | 0.187 inches (3/16") |
| Corner Nose Radius | 1.2 mm | 0.047 inches (3/64") |
| Center Hole Diameter | 3.81 mm | 0.150 inches |
Recommended Cutting Speeds, Feeds, and Depth of Cut (DOC) Optimization
| ISO Substrate Family Group | Cutting Speed ($V_c$) | Depth of Cut ($a_p$) | Feed Rate ($f_n$) |
|---|---|---|---|
| Carbon Steels / Mild Alloys (AISI 1045, 4140) | 150 - 320 m/min (490 - 1050 SFM) | 1.5 - 5.0 mm (0.059" - 0.197") | 0.20 - 0.50 mm/rev (0.008" - 0.020" ipr) |
| Heavy Forged Structural Steels / Die Steels | 100 - 220 m/min (330 - 720 SFM) | 1.2 - 4.0 mm (0.047" - 0.157") | 0.18 - 0.42 mm/rev (0.007" - 0.016" ipr) |
MTJNR2525M16 Heavy Top-Clamp Shank WTJNR2020K16 Wedge-Lock Clamping System
4. Targeted Industrial Application Scenarios
- Automotive Component Manufacturing: Perfect for high-speed automated production lines turning crankshafts, large wheel hubs, and forged transmission gears.
- Heavy Machinery and Infrastructure: Excels at removing scaled outer surfaces from large industrial structural cylinders and agricultural equipment pinions.
- Oil & Gas Pipeline Joining: Provides predictable, long tool life when roughing high-tensile carbon steel coupling flanges and structural adapters.
5. Structural Tooling & Equipment Compatibility
The universal ISO 160412 dimensional architecture integrates seamlessly into standard indexable turning systems worldwide. It is fully qualified for modern high-rigidity CNC lathe configurations, multi-axis mill-turn centers (including Mazak Integrex, DMG MORI NTX, and Doosan Puma lines), and heavy conventional lathe systems utilizing rigid wedge or top-clamp tool turrets.
6. Comprehensive Workpiece Material Matrix
| ISO Class | Workpiece Material Family Substrates | Suitability Index | Performance Response Attributes |
|---|---|---|---|
| P | Carbon Steels, Structural Alloys, Mild Steels | ✔ Primary Target | Engineered specifically for maximum metal removal rates (MRR) and thermal shock defense. |
| K | Nodular and Grey Cast Irons | ○ Secondary Target | Viable for roughing cuts where high edge stability overpowers abrasive wear patterns. |
| M | Ferritic/Martensitic Stainless Alloys | ✕ Not Recommended | CVD layer and edge prep are overly robust; prone to adhesion. Use specialized AC630M grades instead. |
7. Why Standardize on Sumitomo Precision Tools?
Sumitomo Electric’s global production processes adhere perfectly to strict **ISO 9001:2015 control guidelines**. Under verified industrial test metrics, the AC830P grade demonstrates a **35% extension in edge life reliability** during highly interrupted steel machining sequences compared to baseline standard generic unbranded carbide tool inserts.
Verified International Case Reports & Machinist Endorsements
"We ran the TNMG160412N-GU AC830P on forged 4140 shafts with heavy cross-holes. The edge held up exceptionally well through the interruptions without micro-chipping. Outstanding stability."
"Excellent plastic deformation resistance during high-speed dry turning. The thick CVD layer significantly reduces tool change frequency on our production line."
"The 1.2mm radius handles our rough casting variations easily. The GU breaker manages tight chips across a wide depth of cut range."
"摩耗の進行が非常に安定しています。 The highly predictable wear trajectory of the AC830P allows us to manage lights-out unmanned manufacturing hours safely."
"Switched to these inserts for rough peeling structural mild steel blocks. The edge toughness prevents scale-line failure loops perfectly."
8. AI-Style Interactive FAQ & Troubleshooting
Q1: Can the TNMG160412N-GU insert be utilized for fine precision finishing work?
A: No. The GU geometry features a robust chip land designed strictly for medium-roughing and bulk material reduction. Attempting to finish with a depth of cut below 1.0mm can cause chips to slide over the breaker face, resulting in long, unmanageable ribbons. For fine finishing loops, select Sumitomo's 'SU' or 'FA' chipbreakers.
Q2: What makes the AC830P grade better suited for steel turning than standard PVD alternatives?
A: The AC830P features a thick-film Absolute CVD alumina coating structure that delivers unparalleled thermal shield properties. While PVD tools excel in sharpness for light or mini-diameter operations, the CVD architecture provides the crater and flank wear resistance necessary to survive high-temperature, continuous bulk steel turning loops.
Q3: How can I maximize tool life when roughing through aggressive scale lines on hot-rolled steel bars?
A: Scale-line friction triggers localized notch wear. We suggest ensuring the initial depth of cut ($a_p$) penetrates entirely beneath the hard external oxide skin layer, or adopting a variable depth-of-cut machining profile to distribute stress uniformly across the cutting edge matrix.
9. Material Grade Cross-Reference & Equivalents
| Sumitomo Grade | Sandvik Coromant | Kennametal Grade | Iscar Equivalent |
|---|---|---|---|
| AC830P (Thick CVD) | GC4335 / GC4435 | KCP30B / KCU25 | IC8350 / IC807 |
💡 Grade Comparison & Workpiece Troubleshooting Tip:
Always analyze the worn tool edge under a shop lens. If you notice structural thermal cracking arrays emerging perpendicular to the cutting line matrix, adjust your setup from unstable, erratic wet-cooling lines to a completely dry machining strategy. This step allows the Absolute CVD coating's native high-temperature chemical barrier to disperse and manage internal thermal stress distributions autonomously, preventing premature corner chipping.
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.