Mitsubishi TNMA160404 UC5115 | CVD Carbide Cast Iron Insert
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TNMA160404 UC5115
Mitsubishi Materials | The Cast Iron Machining Powerhouse
The Mitsubishi TNMA160404 UC5115 is a heavy-duty CVD coated carbide insert engineered specifically for the high-speed turning of cast iron. Featuring a flat-top (No Chipbreaker) design, it provides maximum edge strength for continuous and heavy-duty cuts. The UC5115 grade is the industry benchmark for stability when machining Gray Cast Iron (FC) and Ductile Cast Iron (FCD), making it an essential long-tail industrial tool for engine blocks, brake discs, and industrial pumps.
CVD Coated | K-Class Specialist | Flat Top Edge Strength
Code Identification Breakdown
Triangular Shape
0° Relief Angle
M-Class Tolerance
Flat Top (No Hole)
16.5mm Edge
4.76mm Thick
0.4mm Radius
Global Standard Reference
| Attribute | ISO (Metric) Model | ANSI (Inch) Equivalent |
|---|---|---|
| Model ID | TNMA160404 | TNMA 331 |
| Inscribed Circle (IC) | 9.525 mm | 0.375" |
| Nose Radius (RE) | 0.4 mm | 0.016" |
UC5115 CVD Grade
The UC5115 grade features a thick alumina ($Al_2O_3$) coating layer that provides extreme heat insulation. This CVD coated carbide is designed to withstand the abrasive nature of cast iron machining. It maintains high hardness even at elevated temperatures, ensuring long tool life in high-speed, continuous cutting environments.
TNMA Geometry (Flat Top)
Unlike chipbreaker types, the TNMA flat-top insert offers a robust cutting edge that resists chipping. While it does not facilitate chip breaking in ductile materials, it is the preferred indexable turning insert for cast iron, which naturally produces short, brittle chips. The flat top ensures maximum stability under high cutting forces.
Recommended Cutting Parameters
| Material Group | Speed ($v_c$) | Feed ($f$) | DOC ($a_p$) |
|---|---|---|---|
| Gray Cast Iron (FC250/300) | 200 - 450 m/min | 0.15 - 0.45 mm/rev | 0.5 - 4.0 mm |
| Ductile Iron (FCD450+) | 150 - 300 m/min | 0.15 - 0.40 mm/rev | 0.5 - 3.5 mm |
TOOL HOLDER COMPATIBILITY
Designed for high-performance MTJNR/L or WTJNR/L top-clamp tool holders (Size 16).
View Compatible Holders →
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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.