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
