Tungaloy SNMG120404R-S T9125 Carbide Turning Insert for Precision Steel Finishing

$79.31 USD

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

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Description

Tungaloy SNMG120404R-S T9125 Turning Insert

Precision Right-Hand Steel Finishing | T9125 CVD Grade | Stable -S Chipbreaker

Which insert is best for finishing steel with a right-hand tool holder?

The Tungaloy SNMG120404R-S T9125 is a premium, double-sided square turning insert specifically engineered for high-precision finishing of ISO P (Steel) materials. This specific Right-Hand (R) model features the T9125 CVD coated grade, designed to withstand high temperatures while maintaining a sharp cutting edge. The -S chipbreaker is specialized for light depths of cut, providing exceptional chip control and preventing surface marring. Authentic Made in Japan, this tool is the professional choice for mass production where surface integrity and dimensional consistency are non-negotiable.

T9125 CVD Advantage

Features a thick Al2O3 layer that provides a powerful thermal barrier. This allows for increased cutting speeds without compromising the carbide substrate's integrity.

-S Chip Control

The -S geometry is fine-tuned for light-duty finishing passes. It forces chips to curl and break even at low feeds, protecting the workpiece from "chip nesting."

PremiumTec Post-Treatment

Tungaloy’s signature surface smoothing technology reduces cutting forces and adhesion, ensuring a superior surface finish and longer tool life.

Decoding SNMG120404R-S Technical Nomenclature

S
Square
N
0° Relief
M
Tolerance
G
Hole/Fix
12
12.7mm Size
04
4.76mm Thick
04
0.4mm Rad.
R-S
Right Hand/S

3. Technical Specifications: Metric vs. Imperial

Parameter Metric (ISO) Imperial Equivalent
Inscribed Circle (IC) 12.7 mm 1/2" (SNMG 431R)
Thickness (S) 4.76 mm 3/16"
Corner Radius (RE) 0.4 mm 1/64"
Application Range ISO P (Steel Finishing) Steel/Alloy Specialist

Recommended Cutting Parameters (T9125 Grade)

  • Cutting Speed (Vc): 180 - 320 m/min (Standard Steel)
  • Feed Rate (f): 0.08 - 0.25 mm/rev
  • Depth of Cut (ap): 0.3 - 1.5 mm

*Note: Ensure your tool holder is Right-Handed to match the 'R' designation of this insert. For best finish, keep Vc high and ap within the recommended range.*

4. Product Applications

  • High-precision turning of small diameter steel shafts.
  • Final surface finishing for automotive and aerospace components.
  • Continuous light-duty turning in medium-to-hard alloy steels.
  • B2B industrial production requiring high dimensional accuracy.

5. Tool Compatibility

Universal fit for standard ISO Right-Hand Turning Holders (e.g., PSSNR, DSBNR, PSKNR). Designed for SNMG 1204 pockets. Ensure toolholder orientation matches the Right-Hand (R) insert geometry.

7. Why Choose CNCHome-Beyond?

Genuine Japan
100% Original Tungaloy
Expert B2B Team
Technical Support Experts
Global Logistics
Fast & Reliable Delivery
Bulk Inventory
Large Quantity Stock

Global Professional Reviews

⭐⭐⭐⭐⭐ "Perfect for Finish Passes" - D. Miller, USA
"Using these for finishing 1045 steel shafts. The right-hand orientation fits my holders perfectly and the -S breaker keeps the chips short."

⭐⭐⭐⭐⭐ "Authentic Tungaloy" - M. Schmidt, Germany
"Original Japanese packaging. The T9125 grade is my workhorse for precision parts. Predictable wear every time."

⭐⭐⭐⭐ "Very Reliable" - K. Tanaka, Japan
"Consistent accuracy for my CNC production line. Tungaloy quality is exactly as expected."

⭐⭐⭐⭐⭐ "Great Service" - R. Ivanova, Bulgaria
"Fast international shipping to Europe. The products are genuine and the technical support from the seller was excellent."

⭐⭐⭐⭐⭐ "Zero Built-up Edge" - S. Tan, Singapore
"Even at 300 m/min, the edge stays clean. The surface finish is very smooth, saving us time on secondary operations."

8. FAQ - Professional Support

Q: Can I use this R-hand insert in a left-hand holder?

A: No. For optimal chip flow and clearance, ensure your tool holder orientation matches the Right-Hand (R) designation of the insert.

Q: Is T9125 better than cermet for finishing?

A: T9125 is tougher. While cermet offers higher gloss, T9125 is much more reliable if your finish pass has slight interruptions or varied depths of cut.

Q: Does this fit SNMG 431 holders?

A: Yes, SNMG 120404 is the metric size equivalent to the Imperial SNMG 431.

Expert Machinist Tip: Finishing Steel with T9125

The T9125 CVD grade is engineered for a "balanced" performance—providing extreme heat resistance while maintaining the edge toughness required for finishing carbon steel. Paired with the -S chipbreaker, it excels at managing the tricky long chips typically found in light finishing. For maximum productivity, ensure rigid setup and consistent coolant flow. Trust Tungaloy Japan for world-class CNC efficiency.

© Technical Data by cnchome-beyond.com - CNC Industrial 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.