Mitsubishi DCMT11T308 UC5115 Carbide Turning Insert for Cast Iron (10pcs)
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DCMT11T308 UC5115
Cast Iron Heavy-Duty | UC5115 Wear-Resistant CVD | 0.8mm Radius
Engineered for High-Abrasive Cast Environments
UC5115 Grade (The K-Class Champion): The UC5115 is Mitsubishi's premier CVD-coated grade for cast iron turning. Unlike steel grades, UC5115 uses a specialized substrate and a thick, smooth Al2O3 + TiCN coating. This combination resists the abrasive "sandpaper" effect of graphite flakes in gray iron and the mechanical shock found in ductile (nodular) iron.
DCMT Geometry (Stability & Flow): The 55-degree diamond shape provides the structural integrity needed for semi-roughing. This positive geometry reduces the tendency for workpieces to vibrate, which is critical when turning large cast iron housings or engine components.
0.8mm Radius (High Edge Integrity): The "08" (1/32") radius is chosen for its strength. It allows for significantly higher feed rates ($f_n$) and provides better heat dissipation than the 0.4mm version. This makes it the preferred radius for semi-roughing and finishing where the tool must endure long cut times.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | DCMT11T308 | 9.525 mm | 3.97 mm | 0.80 mm |
| Imperial | DCMT32.52 | 3/8" | 5/32" | 0.0315" (1/32") |
Recommended Cutting Parameters
*UC5115 thrives in stable, high-speed CNC environments. Dry cutting is often preferred for cast iron.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Gray Cast Iron (FC300) | 180 - 450 m/min | 0.15 - 0.35 mm/r | 0.50 - 3.00 mm |
| Ductile Iron (FCD600) | 120 - 320 m/min | 0.12 - 0.30 mm/r | 0.50 - 2.50 mm |
Compatible Tool Holders
Maximum rigidity for 11-series pockets using SDJCR/L or SDUCR/L holders:
Shop SDJCR 11 HoldersPro-Tip: UC5115 vs. Steel Grades
UC5115 (Iron Specialist): Optimized for heat and abrasion. If you use this on Steel, the lack of "toughness" against chemical welding will cause the insert to crater prematurely.
US735 / UE6110: If you are switching from Cast Iron to Stainless or Carbon Steel, you must switch to these grades. They have the toughness and coating chemistry required for steel chip adhesion.
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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.