Mitsubishi CNMA120408 UC5115 Flat-Top Carbide Insert for Cast Iron (10pcs)
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CNMA120408 UC5115
Universal Cast Iron Specialist | Flat-Top Geometry | UC5115 CVD Grade
Engineered for High-Abrasion Resistance
UC5115 Grade (The K-Class Legend): UC5115 is a high-performance CVD (Chemical Vapor Deposition) coated grade specifically developed for K-Class materials (Cast Iron). It features a thick, heat-resistant Alumina (Al2O3) layer that protects the substrate from the severe thermal loads generated during high-speed dry machining.
CNMA Flat-Top Design: The CNMA designation represents the "Non-Chipbreaker" flat-top geometry. Because cast iron chips naturally shatter into small segments, a chipbreaker groove is not only unnecessary but can act as a stress point. The flat-top design maximizes the carbide volume at the cutting edge, providing superior impact resistance against sand inclusions and rough casting skin.
0.8mm Versatile Radius: The 08 (1/32") corner radius is the global standard for semi-roughing to semi-finishing. It is robust enough to handle high feed rates while still delivering an excellent surface finish (Ra) on gray and ductile iron components.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMA120408 | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMA432 | 1/2" | 3/16" | 0.0315" (1/32") |
Recommended Cutting Parameters
*Optimized for high-speed dry machining. Use flood coolant only if thermal cracking is not a concern.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Gray Cast Iron (GG25) | 180 - 450 m/min | 0.15 - 0.45 mm/r | 0.80 - 4.50 mm |
| Ductile Cast Iron (GGG60) | 120 - 320 m/min | 0.12 - 0.40 mm/r | 0.80 - 4.00 mm |
Required Tool Holders
Maximum clamping stability for DCLNR/L 12 and MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: UC5115 vs. UC5105
UC5115 (The Versatile One): Use this as your primary grade. It handles everything from gray iron to the tougher nodular irons and can manage moderate interrupted cuts.
UC5105 (The High-Speed Specialist): Switch to UC5105 only for continuous, very high-speed turning of gray iron where wear resistance is the only priority and the setup is perfectly stable.
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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.