Tungaloy TNMG160404-SM AH725 PVD Coated Carbide Turning Insert for Stainless Steel - BEYOND

Tungaloy TNMG160404-SM AH725 PVD Coated Carbide Turning Insert for Stainless Steel

$63.02 USD

Price shown is a starting point. Contact us for a precise quote based on your requirements.

american expressmasterpaypalvisaapple paygoogle payshopify pay
Order in the next [totalHours] hours %M minutes to get it between and
Description

Tungaloy TNMG160404-SM AH725 Turning Insert

High-Performance PVD Coated Grade | SM Finishing Geometry | Precision Stainless Machining

What is the best carbide grade for machining stainless steel and sticky materials?

The Tungaloy TNMG160404-SM AH725 is a high-precision, double-sided triangular carbide insert designed specifically for the demanding requirements of stainless steel (M-group) and heat-resistant alloys (S-group). Featuring the advanced AH725 PVD (Physical Vapor Deposition) coating, this insert offers an exceptional balance of wear resistance and toughness. The -SM chipbreaker is specialized for light-to-medium cutting, providing sharp shearing action to prevent work hardening and built-up edge. 100% Made in Japan, it is the industrial standard for achieving superior surface finishes in difficult-to-cut materials.

AH725 PVD Coating

A sub-micron carbide substrate combined with a high-aluminum content PVD coating. This provides extreme edge sharpness and prevents oxidation during high-heat stainless machining.

SM Finishing Geometry

The -SM chipbreaker features a positive rake angle and sharp cutting edge. It minimizes cutting force and is perfect for finishing-to-medium applications where chip control is critical.

Double-Sided 6-Edge Design

The TNMG triangular shape provides 6 usable cutting corners (3 per side), offering maximum economic efficiency and reducing your cost-per-edge in high-volume production.

Decoding TNMG 160404-SM Nomenclature

T
Tri
N
M
Tol.
G
Hole
16
Size
04
Thk
04
0.4 Rad
-SM
Chip

3. Technical Data: Metric (ISO) vs. Imperial (ANSI)

Technical Feature Metric (ISO) Imperial (ANSI)
Standard Model TNMG160404-SM TNMG 331-SM
Inscribed Circle (IC) 9.525 mm 3/8"
Thickness (S) 4.76 mm 3/16"
Corner Radius (RE) 0.4 mm 1/64"

Recommended Cutting Parameters (Stainless)

  • Cutting Speed (Vc): 70 - 180 m/min (Material dependent)
  • Feed Rate (f): 0.10 - 0.30 mm/rev
  • Depth of Cut (ap): 0.5 - 3.0 mm

*Pro-Tip: When machining 304/316 stainless, use the -SM chipbreaker to keep cutting forces low and prevent work hardening of the workpiece surface.*

4. Primary Applications

  • Austenitic Stainless Steel (SUS304, SUS316).
  • Duplex Stainless Steels.
  • Heat Resistant Super Alloys (Inconel, Titanium).
  • Finishing to semi-finishing of small-to-medium parts.

5. Tool Compatibility

Standard ISO TNMG 1604 pockets. Fits perfectly with MTJNR/L, WTJNR/L, or DTGNR/L tool holders. Compatible with all major CNC lathe brands including Haas, Mazak, and Citizen.

7. Why Choose CNCHome-Beyond?

100% Genuine
Tungaloy Japan Stock
Precision Grade
Original PVD Coating
Fast Global Delivery
Express Air Logistics
Sealed Packaging
Factory Guaranteed

Global B2B Feedback

⭐⭐⭐⭐⭐ "Best for 316 Stainless" - Robert H., USA
"We were struggling with built-up edge on 316 parts. The AH725 grade and SM chipbreaker solved it instantly. Surface finish is like a mirror."

⭐⭐⭐⭐⭐ "Reliable Tool Life" - Hans W., Germany
"Very predictable wear patterns. We use these for lights-out production in our shop. Fast shipping from Beyond as always."

⭐⭐⭐⭐ "Sharp Cutting" - Kenji T., Japan
"The SM geometry is very sharp. Great for thin-walled stainless parts where you need to keep the vibration down."

⭐⭐⭐⭐⭐ "Authentic Quality" - Luca R., Italy
"Received original Tungaloy boxes. You can tell the difference in the PVD coating compared to cheaper alternatives."

⭐⭐⭐⭐⭐ "Solid Performance" - Sarah L., UK
"Consistent results across different batches of stainless. Excellent value for money given the 6 edges."

8. FAQ - Professional Support

Q: Is AH725 better than CVD grades for stainless?

A: For light-to-medium cutting and finishing, PVD grades like AH725 are superior because they maintain a much sharper edge, which is vital to prevent work hardening in stainless steel.

Q: What does the -SM chipbreaker do?

A: It is designed specifically for stainless finishing. The geometry reduces cutting resistance and helps in breaking difficult chips common in austenitic alloys.

Q: Can I use this insert on alloy steel?

A: Yes, AH725 is a very versatile grade. While optimized for stainless, it performs excellently on carbon and alloy steels, especially in finishing applications.

Tech Tip: PVD vs. CVD in Stainless Machining

While CVD coatings offer high heat resistance, **PVD coatings (AH725)** provide the edge sharpness required to "shear" stainless steel. This prevents the material from sticking to the tool (built-up edge), ensuring high surface quality and dimensional accuracy. **Tungaloy Japan** - Excellence in Specialized Machining.

© Technical Content by cnchome-beyond.com - Global CNC Tool Authority

Technical FAQ & Buying Guide

Are your carbide inserts interchangeable with major brands like Sandvik, Iscar, or Kennametal?

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.

How do I choose the correct insert grade and chipbreaker for machining Stainless Steel (M) vs. Carbon Steel (P)?

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.
What are the recommended cutting speed (Vc) and feed rate (f) parameters to maximize tool life?

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.
Do you offer bulk discounts or wholesale pricing for machine shops and distributors?

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.

What is your international shipping policy and typical lead time for orders?

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.

How do you guarantee the quality and tolerance precision of your CNC tools?

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.