Tungaloy TNMG220404L-S T9125 Left-Hand CVD Carbide Turning Insert for Steel - BEYOND

Tungaloy TNMG220404L-S T9125 Left-Hand CVD Carbide Turning Insert for Steel

$99.47 USD

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

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Description

Tungaloy TNMG220404L-S T9125 Turning Insert

Precision Left-Hand Machining | T9125 Premium Steel Grade | -S Finishing Geometry

What is the best 22mm left-hand insert for stable steel finishing?

The Tungaloy TNMG220404L-S T9125 is a high-performance, industrial-grade turning insert designed for the specialized needs of left-hand (L) machining operations. Engineered for finishing to light-duty cutting of carbon and alloy steels, this 22mm size insert provides superior reach and stability. Featuring the T9125 CVD coated carbide grade, it excels in heat resistance and edge retention. The -S (RS) chipbreaker ensures smooth chip evacuation at low feed rates, delivering a superior surface luster. 100% Made in Japan, it is the professional choice for high-precision B2B manufacturing.

T9125 Grade Technology

A specialized CVD grade with a thick Al2O3 layer. It offers extreme resistance to crater wear and plastic deformation during high-speed finishing cycles.

-S (RS) Chipbreaker

Specifically optimized for finishing applications. Its sharp edge geometry reduces cutting forces and eliminates vibration for tight-tolerance parts.

Large 22mm ISO Size

The larger TNMG 22 size offers increased rigidity and heat dissipation compared to smaller variants, ideal for heavier finishing operations.

Decoding TNMG 220404L-S Nomenclature

T
Tri
N
M
Tol.
G
D-Side
22
Size
04
Thk
04
0.4 Rad
L
LH
-S
Chip

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

Technical Feature Metric (ISO) Imperial (ANSI)
Standard Model TNMG220404L-S TNMG 431L-S
Inscribed Circle (IC) 12.7 mm 1/2"
Thickness (S) 4.76 mm 3/16"
Corner Radius (RE) 0.4 mm 1/64"

Recommended Finishing Parameters

  • Cutting Speed (Vc): 150 - 320 m/min
  • Feed Rate (f): 0.05 - 0.20 mm/rev
  • Depth of Cut (ap): 0.2 - 1.5 mm

*Pro-Tip: Use high cutting speeds to activate the Al2O3 thermal barrier. Constant coolant flow is recommended for left-hand boring cycles.*

4. Primary Applications

  • Precision finishing of carbon and alloy steels.
  • Boring operations requiring left-hand tool rotation.
  • Automotive components with complex internal profiles.
  • Mass production requiring extremely stable wear life.

5. Tool Compatibility

Compatible with all standard ISO/ANSI TNMG 2204 tool holders. Recommended for use with MTJNL or WTJNL series holders. Fits Haas, DMG Mori, and Mazak CNC centers.

7. Why Source from CNCHome-Beyond?

100% Genuine
Tungaloy Japan Stock
Technical Experts
Support for Tool Cycles
Fast Shipping
Global B2B Delivery
Factory Sealed
Original Japan Packaging

Feedback from Real Machine Shops

⭐⭐⭐⭐⭐ "Incredible Stability" - James K., USA
"The larger TNMG 22 size is perfect for our heavy finishing passes. Left-hand orientation is exactly what we needed for our specific CNC setup. T9125 lasts through the whole shift."

⭐⭐⭐⭐⭐ "Original Japan Quality" - Markus D., Germany
"Received original Tungaloy boxes. The surface finish on alloy steel is mirror-like with the -S chipbreaker."

⭐⭐⭐⭐ "Consistent Performance" - Luca B., Italy
"We use these for precision boring. The wear pattern is very predictable, which helps us maintain tolerances over long runs."

⭐⭐⭐⭐⭐ "Fast Shipping, Genuine Product" - H. Sato, Japan
"Confirmed original stock. T9125 is my top choice for steel machining. The technical data provided was very accurate."

⭐⭐⭐⭐⭐ "Excellent Surface Finish" - Rajesh V., India
"The -S geometry handles the chips perfectly even at low feed rates. No vibration issues at all."

8. FAQ - Professional Support

Q: Why use a larger TNMG 22 size instead of 16?

A: The TNMG 22 size provides a larger contact surface and more carbide volume, which leads to better heat dissipation and increased rigidity during precision finishing operations.

Q: Is T9125 suitable for heavy roughing?

A: T9125 is highly versatile, but with the -S chipbreaker, it is optimized for finishing to light-duty cutting. For heavy roughing, we recommend the -TM or -TH chipbreakers.

Q: What tool holder is required for the 'L' orientation?

A: You must use a left-hand tool holder (e.g., MTJNL 2525 M22) to ensure the cutting edge is positioned correctly for the spindle rotation.

Tech Tip: T9125 Grade vs. Cermet

While cermet offers high gloss, **T9125 CVD coated carbide** provides superior toughness. It is much more resistant to chipping during interrupted finishing cuts on steel. **Tungaloy Japan** - Excellence in precision engineering.

© Technical Data 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.