Taegutec TNMG 160404L-FS TT8125 CVD Insert Left-Hand Steel Finishing (10pcs)

$125.98 USD

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

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Description

TaeguTec TNMG 160404L-FS TT8125

Precision Left-Hand Finishing for Challenging Steel Applications

Product Overview

"Which left-hand insert provides the best surface finish on steel when the setup is not perfectly rigid or has light interruptions?"

The TaeguTec TNMG 160404L-FS TT8125 is a specialized Left-hand (L) finishing insert designed for ISO P (Steel). Utilizing the TT8125 "Tough-CVD" grade, this insert features a multi-layered alumina coating over a high-toughness substrate. The FS (Finishing) chipbreaker is engineered with a sharp, positive rake angle specifically for low depths of cut, ensuring that chips are broken cleanly away from the workpiece. With a 0.4mm corner radius, it delivers the tight dimensional tolerances and superior surface Ra required for high-precision components.

Key Core Advantages

TT8125 Edge Security

A toughened CVD grade that bridges the gap between wear resistance and impact strength, preventing chipping in vibrating setups.

FS Chip Management

Optimized for fine finishing. It prevents "bird-nesting" at feed rates as low as 0.05 mm/rev, protecting the part surface.

Thermal Barrier Coating

The advanced Al2O3 layer acts as a heat shield, maintaining tool hardness even during high-speed continuous cutting.

Technical Specifications

Insert Code Decoding: TNMG 160404L-FS

T
Triangle
N
Negative
M
Tolerance
G
Hole/Chip
160404
0.4 Rad
L-FS
LH-Finish
Unit System Designation I.C. / Thickness Radius
Metric (ISO) TNMG 160404L-FS 9.525 / 4.76 mm 0.40 mm
Imperial (ANSI) TNMG 331L-FS 3/8" / 3/16" 1/64"

Recommended Cutting Parameters (TT8125 Grade)

Material (ISO P) Vc (Speed m/min) fn (Feed mm/rev)
Carbon / Alloy Steel 180 - 320 0.05 - 0.20
Die / Mold Steel 150 - 280 0.05 - 0.18

Left-Hand System Pairing


Applications & Tool Compatibility

  • Small Part Finishing: Perfect for high-tolerance shafts and pins in carbon steel.
  • Reverse Turning: Ideal for specific CNC paths requiring a Left-hand orientation.
  • Semi-Interrupted Cuts: The TT8125 substrate absorbs impacts where other finishing grades chip.
  • Compatibility: Fits all ISO-standard size 16 negative Left-hand holders (MTJNL, PSSNL, etc.).

TaeguTec Grade Performance Chart

Grade Condition Coating Primary Benefit
TT8125 General / Semi-Interrupted CVD High Toughness Finishing
TT8115 High Speed Continuous CVD Max Wear Resistance
TT9225 Interrupted / Roughing CVD Max Edge Security

Why Machinists Trust TT8125?

Finishing is the most critical stage of production. A chipped tool here can scrap a nearly finished part. The TNMG 160404L-FS TT8125 is designed as a "Security Grade." It bridges the gap between high-speed CVD performance and the ruggedness of a PVD grade. The FS geometry acts as a precision micro-plow, reducing cutting forces to ensure the tool doesn't deflect. When your process requires Left-hand tooling and absolute consistency, TT8125 is the stable choice that maximizes your yield and machine uptime.

★★★★★

"Perfect for our sub-spindle operations. The LH orientation was hard to find in such a tough grade."

— Mike R., USA
★★★★★

"Exzellente Standzeit bei der Bearbeitung von legiertem Stahl. Sehr empfehlenswert."

— Hans B., Germany
★★★★★

"Ottima finitura superficiale anche in condizioni di taglio instabile."

— Pietro L., Italy
★★★★☆

"Strongest finishing edge we've used for reverse turning paths."

— Kenji H., Japan

Frequently Asked Questions

Q: Can I use this on a Right-Hand toolholder?
A: No. The "L" indicates a Left-Hand geometry. It must be paired with Left-Hand (LH) holders to ensure the correct cutting angle and chip flow.
Q: What is the maximum depth of cut for the FS chipbreaker?
A: The FS is optimized for finishing. For best results, keep your depth of cut (ap) between 0.3mm and 1.5mm.
Q: Is TT8125 suitable for Stainless Steel?
A: While it can cut stainless, TT8125 is optimized for ISO P Steel. For ISO M Stainless, we recommend PVD grades like TT9080.

Pro-Tip: When using left-hand finishing inserts, ensure your coolant pressure is high to clear chips away from the spindle side of the part.

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.