Tungaloy SCMT120404-24 T9125 Square Carbide Turning Insert for Steel

$90.80 USD

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Description

Tungaloy SCMT120404-24 T9125 Insert

High-Efficiency Steel Turning | 24 Precision Breaker | Premium T9125 CVD Grade

What is the best carbide insert for high-speed steel turning?

The Tungaloy SCMT120404-24 T9125 is a robust square carbide turning insert designed specifically for the high-speed processing of ISO P (Steel) materials. Featuring the world-renowned T9125 CVD coating, this insert provides an exceptional balance of wear resistance and toughness, making it ideal for continuous to light interrupted cuts. The 24 chipbreaker is engineered for finishing and medium cutting applications, delivering excellent chip control and reducing cutting forces. Made in Japan, these inserts are a favorite for CNC professionals seeking to maximize productivity while maintaining high surface integrity in carbon and alloy steels.

Premium T9125 CVD Grade

Combines a high-hardness Al2O3 layer with a tough TiCN base, offering superior heat resistance for high surface speeds (Vc).

24 Finishing Breaker

The positive rake angle design ensures sharp cutting action, reducing vibration and achieving Ra-standard surface finishes.

PremiumTec Treatment

Tungaloy's unique surface treatment smooths the coating, preventing chip welding and ensuring predictable tool life.

Decoding SCMT120404-24 Technical Nomenclature

S
Square
C
7° Relief
M
Tolerance
T
Hole/Fix
12
12.7mm Size
04
4.76mm Thick
04
0.4mm Rad.
24
Breaker

3. Technical Specifications: Metric vs. Imperial

Feature Metric (ISO) Imperial Equiv.
Inscribed Circle (IC) 12.70 mm 1/2 inch
Thickness (S) 4.76 mm 3/16 inch
Corner Radius (RE) 0.4 mm 1/64 inch
Hole Diameter (D1) 5.16 mm 0.203 inch

Recommended Cutting Parameters (T9125 Grade)

  • Cutting Speed (Vc): 150 - 350 m/min (Continuous Finish-Turning)
  • Feed Rate (f): 0.10 - 0.30 mm/rev (Breaker Optimization)
  • Depth of Cut (Ap): 0.5 - 3.0 mm (Medium to Finish)

*Pro Tip: For improved life in alloy steel, use high-pressure coolant directed at the cutting edge.*

4. Product Applications

  • Outer and inner diameter turning of carbon steel.
  • Machining of alloy steel shafts and large gears.
  • Finishing operations on automotive structural parts.
  • High-volume production lines for industrial fasteners.

5. Tool Compatibility

Fits standard SSDCN, SSKCR/L, and SSGCR/L turning tool holders designed for 12.7mm square inserts (Size 1204). Compatible with all major CNC lathe spindles.

7. Why Choose CNCHome-Beyond?

Genuine Tungaloy
100% Original Japan Stock
OEM Partnership
Supply Chain for Geely Auto
Expert Support
Technical Machining Guidance
Global Logistics
Fast Shipping to 50+ Countries

Verified Customer Feedback

⭐⭐⭐⭐⭐ "Workhorse Grade" - D. Miller, USA
"T9125 is my go-to for steel turning. Predictable tool life and handles high RPM without melting down."

⭐⭐⭐⭐⭐ "Excellent Chip Control" - K. Wagner, Germany
"The 24 breaker on these SCMT inserts works wonders on our CNC lathes. No birdnesting even on gummy steels."

⭐⭐⭐⭐ "Very Stable" - T. Sato, Japan
"Consistent results. Tungaloy quality is always impressive. Used for automotive gear production."

⭐⭐⭐⭐⭐ "Original Packaging" - G. Rossi, Italy
"Fast delivery and genuine products. Performance in 4140 alloy steel is outstanding."

⭐⭐⭐⭐⭐ "Great Price Performance" - A. Tan, Singapore
"Cheaper per part than our previous supplier. Tungaloy T9125 is much more durable at high feed rates."

8. FAQ - Machining Support

Q: Can I use T9125 for stainless steel?

A: T9125 is optimized for ISO P (Steel). For stainless steel (ISO M), we recommend Tungaloy AH series or T6130 grade.

Q: What is the benefit of the CVD coating?

A: CVD coatings are thicker than PVD, providing superior thermal protection and wear resistance at the higher temperatures found in high-speed turning.

Q: Does it fit SSDCN tool holders?

A: Yes, it is a standard ISO SCMT 1204 size and is perfectly compatible with SSDCN series holders.

Expert Tip: CVD vs. Cermet for Steel

While cermet offers a mirror finish, the T9125 CVD coated carbide is significantly tougher. If your part involves any interruption (like a cross-hole or keyway) or you need higher metal removal rates, the SCMT120404 T9125 is the safer, more productive choice for industrial-scale manufacturing.

© Technical Content by cnchome-beyond.com - 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.