Mitsubishi JDMT120420ZDSR-JM FH7020 Milling Insert | MMC Japan
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JDMT120420ZDSR-JM FH7020
Mitsubishi Materials | AJX Series Cast Iron High-Feed Specialist
The Mitsubishi JDMT120420ZDSR-JM FH7020 is a high-performance high-feed milling insert specifically optimized for Cast Iron (Gray & Ductile) machining. While the VP series focuses on stainless steel, the FH7020 grade is engineered for high-speed wear resistance in abrasive iron materials. Utilizing the AJX12 system's high-efficiency geometry, this insert provides maximum metal removal rates (MRR) while maintaining edge stability via the JM chipbreaker.
Technical Specifications
| ISO Designation (Metric) | JDMT120420ZDSR-JM |
|---|---|
| ANSI Designation (Inch) | JDMT 434ZDSR-JM |
| Insert Size | 12 (For AJX 12 Type Cutters) |
| Corner Radius (RE) | 2.0 mm (.0787") |
| Grade / Coating | FH7020 (PVD Coated Specialist for Cast Iron) |
FH7020 Grade Efficiency
The FH7020 grade is a PVD coated carbide developed for abrasion resistance. Cast iron machining generates significant friction; FH7020 resists flank wear and thermal cracking, allowing for higher cutting speeds ($v_c$) compared to general-purpose grades when dry machining iron.
JM Chipbreaker Strategy
The JM (General Machining) chipbreaker on this JDMT12 series insert features a strengthened edge. It is designed to sustain high feed rates while effectively managing the short, brittle chips typical of cast iron milling, preventing dust buildup and heat concentration at the edge.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | Feed Per Tooth ($f_z$) |
|---|---|---|
| Gray Cast Iron (FC250/300) | 150 - 300 m/min | 1.0 - 2.5 mm/t |
| Ductile Cast Iron (FCD) | 120 - 220 m/min | 0.8 - 2.0 mm/t |
AJX12 SYSTEM COMPATIBILITY
This insert fits all AJX 12 Type high-feed cutters, optimized for high-rigidity spindles.
Shop AJX 12 Tool Holders →Metric vs. Inch Cross-Reference
| Feature | ISO: JDMT120420 | ANSI: JDMT 434 |
|---|---|---|
| Insert Width | 12.7 mm | 1/2" |
| Thickness | 4.76 mm | 3/16" |