SUMITOMO TNMG160412N-GU AC830P Carbide Turning Insert (TNMG 333-GU)
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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.
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.