Tungaloy TNMG160404L-S T9125 Left-Hand CVD Coated Carbide Turning Insert for Steel - BEYOND

Tungaloy TNMG160404L-S T9125 Left-Hand CVD Coated Carbide Turning Insert for Steel

$69.92 USD

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

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Description

Tungaloy TNMG160404L-S T9125 Turning Insert

Left-Hand Precision Steel Machining | T9125 CVD Technology | -S Finishing Geometry

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

The Tungaloy TNMG160404L-S T9125 is an industrial-grade, left-hand (L) oriented turning insert engineered for high-performance machining of carbon and alloy steels. Featuring the T9125 CVD coated carbide grade, it offers an exceptional balance of wear resistance and fracture toughness, even under fluctuating cutting temperatures. The -S (RS) chipbreaker is specialized for finishing to light-duty cutting, ensuring excellent chip evacuation and preventing workpiece marring. 100% Made in Japan, it is the ideal choice for CNC shops requiring precision left-hand tools for complex profiles and finishing passes.

T9125 CVD Grade

A premium CVD coated grade optimized for steel. The thick coating layer provides high heat resistance, significantly extending tool life during high-speed continuous cutting.

-S (RS) Finishing Chipbreaker

Specifically designed for finishing. Its sharp geometry reduces cutting forces and manages chips effectively at low feed rates, delivering a high-quality surface finish.

Left-Hand (L) Orientation

The "L" designation indicates a left-hand cutting direction, essential for specific tool holder setups (e.g., MTJNL) and back-turning operations.

Decoding TNMG 160404L-S Nomenclature

T
Tri
N
M
Tol.
G
D-Side
16
Size
04
Thk
04
0.4 Rad
L
LH
-S
Chip

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

Technical Feature Metric (ISO) Imperial (ANSI)
Standard Model TNMG160404L-S TNMG 331L-S
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

  • 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: Ensure the tool holder is securely clamped. Left-hand finishing at high speeds with T9125 provides a superior surface luster when the setup is rigid.*

4. Primary Applications

  • Precision finishing of carbon and alloy steels (P-group).
  • Automotive components requiring specific left-hand tool paths.
  • Boring and finishing operations in specialized CNC lathe cycles.
  • Final passes on heat-treated steel parts.

5. Tool Compatibility

Designed for all standard ISO/ANSI triangular tool pockets. Pair with MTJNL, WTJNL, or DTLNR holders. Fits seamlessly with major CNC brands including Mazak, Okuma, and Haas.

7. Why Source from CNCHome-Beyond?

100% Genuine
Tungaloy Japan Stock
Technical Experts
CNC Solutions Support
B2B Logistics
Global Express Shipping
Factory Sealed
Verified Original Box

Verified Machinist Reviews

⭐⭐⭐⭐⭐ "Perfect for LH Finishing" - Markus D., Germany
"Used this for a batch of steel pins. The left-hand setup worked perfectly and the surface Ra was spot on. T9125 lasts much longer than our previous inserts."

⭐⭐⭐⭐⭐ "Original Quality" - James K., USA
"Fast shipping from Beyond. These are original Tungaloy boxes. The -S chipbreaker handles the chips nicely without marring the finish."

⭐⭐⭐⭐ "Great for Steel" - Luca B., Italy
"Consistent performance in 4140 steel. Left-hand inserts are sometimes hard to find in stock, but Beyond had them. Authentic Japan quality."

⭐⭐⭐⭐⭐ "Reliable B2B Partner" - H. Sato, Japan
"Original stock confirmed. Very stable edge life even in high-speed finishing passes. Highly recommended for CNC shops."

⭐⭐⭐⭐⭐ "Best Value for Original Tungaloy" - Rajesh V., India
"Precise radius and very sharp cutting edge. Excellent value for money. The technical data provided was very helpful."

8. FAQ - Professional Machining Support

Q: What is the benefit of the 'L' (Left-Hand) designation?

A: Left-hand inserts are designed to cut in the opposite direction of standard tools. This is required for specific spindle rotations or tool holder orientations (like back-turning) where a right-hand tool would not clear the workpiece.

Q: How does T9125 compare to T9215?

A: T9125 is a versatile CVD grade that handles a wide range of steel types and cutting conditions. T9215 is optimized for even higher-speed continuous cutting. T9125 offers better toughness for general-purpose finishing.

Q: Can I use this for stainless steel?

A: While T9125 can handle some stainless steels, it is primarily optimized for carbon and alloy steels (ISO P). For stainless steel finishing, we recommend Tungaloy's T6100 or AH series grades.

Tech Tip: Optimizing Tool Life

To maximize the performance of the **T9125 grade**, maintain a constant cutting speed and avoid low speeds that can cause built-up edge (BUE). High speed prevents the material from sticking to the CVD coating. **Tungaloy Japan** - Excellence in precision cutting technology.

© 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.