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

✓ In Stock & Fast Dispatch: Order processing: typically 1–3 business days after confirmation.
✓ Global Shipping: Delivery: generally 5–20 business days, depending on destination and shipping method.
✓ Guaranteed Quality: Check model, dimensions and compatibility before ordering. | Direct Factory Outlet
✓ Technical Support: Need grade selection help? Contact Engineer

💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF

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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
0°
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

How do I choose the correct specification?

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.

How can I check compatibility with my existing setup?

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.

What quantity and price unit am I 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.

How should I choose cutting parameters?

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.

Are bulk discounts available?

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.

When will my order ship and arrive?

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.