Tungaloy SNMG120408R-S T9125 Right-Hand Carbide Turning Insert for Steel

$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 SNMG120408R-S T9125 Turning Insert

High-Stability Right-Hand Steel Machining | T9125 CVD Grade | Specialized -S Chipbreaker

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

The Tungaloy SNMG120408R-S T9125 is a high-performance, double-sided square turning insert specifically engineered for ISO P (Steel) applications. This Right-Hand (R) specific geometry, combined with the -S chipbreaker, is designed to provide maximum stability during finishing and light-to-medium duty turning. Utilizing Tungaloy’s premium T9125 CVD coated grade, this insert offers an industry-leading balance of thermal stability and high-speed wear resistance. 100% Made in Japan, it is the professional choice for CNC workshops requiring consistent precision and long tool life in alloy and carbon steels.

T9125 Grade Technology

A specialized CVD grade featuring a thick Al2O3 layer that acts as a thermal barrier, protecting the carbide substrate from heat deformation during high-speed steel turning.

-S Chipbreaker Design

The -S geometry is optimized for chip control in finishing. It creates stable chip breaking even at lower depths of cut, ensuring the workpiece surface remains scratch-free.

PremiumTec Treatment

Advanced post-treatment smoothens the insert surface, significantly reducing friction and preventing the built-up edge (BUE) common in steel machining.

Decoding SNMG120408R-S Technical Nomenclature

S
Square
N
0° Relief
M
Tolerance
G
Hole/Fix
12
12.7mm Size
04
4.76mm Thick
08
0.8mm Rad.
R-S
Right/Breaker

3. Technical Specifications: Metric vs. Imperial

Parameter Metric (ISO) Imperial Equivalent
Inscribed Circle (IC) 12.7 mm 1/2" (SNMG 432R)
Thickness (S) 4.76 mm 3/16"
Corner Radius (RE) 0.8 mm 1/32"
Grade Compatibility T9125 (CVD) Steel & Alloy Specialist

Recommended Cutting Parameters (T9125)

  • Cutting Speed (Vc): 160 - 320 m/min (Ideally 250 m/min for alloy steel)
  • Feed Rate (f): 0.12 - 0.40 mm/rev
  • Depth of Cut (ap): 0.5 - 2.5 mm

*Note: Please ensure you are using a Right-Hand (R) tool holder. Proper alignment ensures the -S breaker performs optimally at higher feed rates.*

4. Product Applications

  • Continuous turning of automotive transmission shafts.
  • Finishing alloy steel flanges and precision hardware.
  • B2B heavy machinery component production.
  • High-volume CNC turning of carbon steel cylinders.

5. Tool Compatibility

Universal fit for standard ISO Right-Hand Turning Holders (External: DSBNR, PSSNR; Internal: S...-PSSNR). Specifically designed for SNMG 1204 pocket seats.

7. Why Choose CNCHome-Beyond?

Genuine Tungaloy
Original Japan Import
Industrial Expertise
CNC B2B Specialists
Fast Shipping
Reliable Global Delivery
Factory Ready
Bulk Quantity Availability

B2B Customer Feedback

⭐⭐⭐⭐⭐ "Workhorse Grade" - Robert T., UK
"T9125 is incredibly predictable. We run these on our Puma lathes for right-hand finishing passes. Great tool life."

⭐⭐⭐⭐⭐ "Excellent Surface Finish" - H. Bauer, Germany
"Authentic Japanese Tungaloy. The -S breaker handles alloy steel chips perfectly. Surfaces are smooth enough to skip grinding."

⭐⭐⭐⭐ "Very Sharp Edge" - K. Saito, Japan
"Consistent accuracy for my CNC production line. Very reliable for finishing operations."

⭐⭐⭐⭐⭐ "Reliable Supplier" - M. Silva, Brazil
"Order arrived quickly. These SNMG120408R inserts were exactly what we needed for our high-volume production."

⭐⭐⭐⭐⭐ "Stable Cutting" - Lim J., Singapore
"No vibration and stable chip control at 0.8mm radius. Best CVD grade for our carbon steel components."

8. FAQ - Professional Support

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

A: No. Proper chip evacuation and tool geometry require the hand of the insert (R) to match the hand of the tool holder.

Q: What is the difference between T9125 and T9225?

A: T9125 is more wear-resistant for continuous cuts, while T9225 is tougher for interrupted cuts or heavier roughing.

Q: Does this fit SNMG 432R holders?

A: Yes, SNMG 120408 is the exact metric equivalent to the Imperial SNMG 432 specification.

Industrial Tip: The Strength of T9125 Grade

The T9125 grade is engineered for a "balanced" life—offering high resistance to both heat and mechanical wear. While cermet grades like NS9530 are for the ultimate gloss, T9125 is the reliable workhorse for precision finishing where tool reliability is paramount. Trust Tungaloy Japan for your mass production needs. Experience world-class efficiency at your spindle.

© Technical Data by cnchome-beyond.com - 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.