Mitsubishi CNMG120408 UC5105 High-Speed Cast Iron Turning Insert (10pcs)
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CNMG120408 UC5105
High-Speed Performance | UC5105 CVD Grade | Gray Iron Specialist
Engineered for Maximum Surface Speed
UC5105 Grade (CVD Coating): UC5105 is the premier grade for High-Speed Turning of Gray Cast Iron. It features a specialized Alumina (Al2O3) coating with a refined grain structure that provides industry-leading resistance to crater wear and plastic deformation. This grade is designed for high-productivity environments where cycle time reduction is critical.
CNMG Geometry & Chipbreaker: This 80-degree diamond insert utilizes a multi-purpose chipbreaker optimized for cast iron. It effectively handles the unique chip formation of Gray Iron, preventing "powdering" from interfering with the tool life while providing four distinct cutting edges for maximum economy.
0.8mm (1/32") Radius: The 08 radius is the global standard for CNC turning. It offers excellent edge stability for semi-roughing while being capable of producing high-quality finishes at standard feed rates.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120408 | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMG432 | 1/2" | 3/16" | 0.0315" (1/32") |
Recommended Cutting Parameters
*UC5105 is designed for continuous, high-speed cutting. Use with stable machine setups for best results.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Gray Cast Iron (HT200-300) | 250 - 600 m/min | 0.15 - 0.45 mm/r | 0.50 - 4.50 mm |
| Ductile Iron (Stable Cut) | 180 - 400 m/min | 0.12 - 0.35 mm/r | 0.50 - 3.50 mm |
Compatible Tool Holders
Maximum performance for DCLNR/L 12 and MCLNR/L 12 turning systems:
Shop DCLNR 12 HoldersPro-Tip: UC5105 vs. UC5115
UC5105 (The High-Speed King): Best for continuous finishing or semi-roughing of Gray Iron where tool life is limited by abrasive wear.
UC5115 (The All-Rounder): Best for general-purpose use, interrupted cuts, or when machining Ductile Iron that requires higher fracture toughness.
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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.