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" |
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This Mitsubishi insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.