Mitsubishi CNMG120412 UC5115 CVD Carbide Insert for Heavy Cast Iron Roughing
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CNMG120412 UC5115
Roughing Powerhouse | UC5115 CVD Grade | 1.2mm Heavy-Duty Radius
Engineered for Maximum MRR
UC5115 Grade (CVD Coating): The UC5115 is a high-performance CVD-coated grade optimized for K-Class (Cast Iron) materials. It features a specialized thick Alumina layer that provides extreme heat resistance. This allows the insert to withstand the high temperatures generated when machining abrasive Gray Iron and high-strength Ductile Iron without losing edge hardness.
CNMG Geometry & Roughing Chipbreaker: This insert features a robust chipbreaker designed for medium-to-heavy roughing. The 80-degree diamond shape provides four usable cutting edges with high structural integrity, ensuring stable chip control even at deep depths of cut.
1.2mm (3/64") Heavy-Duty Radius: The larger 1.2mm radius is the key to this insert's success in roughing. It strengthens the corner against thermal cracking and chipping, enabling the operator to push higher Feed Rates (fn) while maintaining a stable cutting edge through surface scale and interruptions.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120412 | 12.7 mm | 4.76 mm | 1.20 mm |
| Imperial | CNMG433 | 1/2" | 3/16" | 0.0472" (3/64") |
Recommended Roughing Parameters
*The 1.2mm radius generates significant radial forces. Ensure your setup is rigid and the machine has sufficient torque.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Gray Iron (GG25/Class 35) | 150 - 450 m/min | 0.25 - 0.60 mm/r | 1.20 - 5.50 mm |
| Ductile Iron (GGG60/80-55-06) | 120 - 320 m/min | 0.20 - 0.50 mm/r | 1.20 - 4.50 mm |
Compatible Tool Holders
Maximum performance with DCLNR/L 12 and MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: UC5115 vs. MC5015
UC5115: Use this for general-purpose roughing where toughness is required. It is highly reliable for interrupted cuts and ductile iron.
MC5015: Choose this for pure high-speed stable turning of gray iron where wear resistance (crater wear) is the primary concern and production volume is high.
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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.