Tungaloy SDMT1204PDSR-MJ AH120 Square Milling Insert for Steel and Cast Iron - BEYOND

Tungaloy SDMT1204PDSR-MJ AH120 Square Milling Insert for Steel and Cast Iron

$142.70 USD

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

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Description

Tungaloy SDMT1204PDSR-MJ AH120 Insert

High-Performance Face Milling | AH120 Tough PVD Grade | -MJ General Chipbreaker

What is the most reliable insert for general face milling?

The Tungaloy SDMT1204PDSR-MJ AH120 is a premium square milling insert designed for versatility and durability in high-torque face milling and shoulder milling operations. Featuring the legendary AH120 PVD coated grade, this insert provides an exceptional balance between wear resistance and fracture toughness. The -MJ chipbreaker is Tungaloy's "General Purpose" geometry, specifically engineered to provide stable chip control across a wide range of cutting depths. Made in Japan, this insert is the go-to solution for machinists processing ISO P (Steel) and ISO K (Cast Iron) who demand consistent cycle times and high-quality surface finishes.

AH120 Toughness

A specialized PVD grade with a micro-grain carbide substrate. It excels in interrupted cuts and unstable machining conditions where other grades might chip.

-MJ General Breaker

The MJ geometry is designed for medium-duty cutting. It features a reinforced cutting edge that prevents sudden breakage while maintaining smooth chip evacuation.

Premium post-treatment

Post-coating surface treatment ensures a smooth face, reducing friction and preventing "built-up edge" (BUE) when machining soft steels.

Decoding SDMT1204PDSR-MJ Technical Nomenclature

S
Square
D
15° Relief
M
Tolerance
T
Hole/Fix
12
Size 12
04
4.76mm Thick
PDSR
Geometry
MJ
Breaker

3. Technical Specifications: Metric vs. Imperial

Parameter Metric (ISO) Imperial Equivalent
Insert Size 12.7 mm 1/2" (SDMT 42)
Thickness 4.76 mm 3/16"
Hole Diameter 5.5 mm 0.216"
Grade AH120 (PVD) PVD Coated Grade

Recommended Cutting Parameters (AH120 Grade)

  • Cutting Speed (Vc): 100 - 180 m/min (Highly reliable for Steel/Cast Iron)
  • Feed per Tooth (fz): 0.10 - 0.25 mm/t
  • Depth of Cut (Ap): 0.5 - 4.5 mm

*Note: Use AH120 for general-purpose applications. If higher speeds are required in very stable steel cuts, consider T1215.*

4. Product Applications

  • General face milling of carbon and alloy steels.
  • Shoulder milling where 90-degree precision is not critical.
  • Machining cast iron engine components or machine bases.
  • Excellent for job shops with mixed-material production.

5. Tool Compatibility

Universal fit for Tungaloy TungMill series face mills (TPW13 or similar) and any cutter body designed for SDMT 1204 square inserts. Compatible with high-torque CNC milling centers.

7. Why Choose CNCHome-Beyond?

Genuine Tungaloy
100% Original Japanese Product
CNC Expert Advice
Technical Parameter Support
Industrial Reliability
Supplying Global Manufacturers
Fast Shipping
Global Express Logistics

Reviews from the Shop Floor

⭐⭐⭐⭐⭐ "Workhorse Grade" - James L., UK
"AH120 is just so predictable. In our shop, we use these for everything from mild steel to grey iron. They just work."

⭐⭐⭐⭐⭐ "Great Chip Control" - M. Braun, Germany
"The -MJ breaker is perfect. Chips curl and break away nicely, even when we take deeper cuts. Finish is top notch."

⭐⭐⭐⭐ "Very Stable" - T. Yamamoto, Japan
"Consistent performance across the batch. Tungaloy quality is evident. Best for general job shop work."

⭐⭐⭐⭐⭐ "Original Packaging" - G. Russo, Italy
"Authentic inserts. Fast shipping from CNCHome-Beyond. These helped us clear a backlog of gear housings."

⭐⭐⭐⭐⭐ "High Feed Quality" - Alex P., Singapore
"The edge stays sharp longer than the competition's equivalents. We noticed better thermal stability in long runs."

8. FAQ - Support Center

Q: Can I use AH120 on Stainless Steel?

A: While it can cut stainless in a pinch, we recommend AH3135 or AH130 grades for optimal tool life in ISO M materials.

Q: What is the benefit of the -MJ chipbreaker?

A: It is a general-purpose breaker that offers the best balance of edge strength and chip control for medium-depth milling.

Q: Does this fit standard 42-size tool holders?

A: Yes, SDMT 1204 is the ISO metric equivalent to the Imperial SDMT 42 size.

Expert Machinist Tip: The Power of AH120

The AH120 PVD grade is designed for the "real world" of machining. While CVD grades might handle higher speeds in laboratory conditions, AH120 thrives on the shop floor where vibrations, varied material hardness, and interrupted cuts are the norm. Paired with the -MJ breaker, it creates a robust cutting system that protects your spindle and your workpiece. Trust Tungaloy Japan for excellence.

© Technical Data 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.