Mitsubishi TPMN160308 NX2525 | High-Gloss Cermet Turning Insert
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TPMN160308 NX2525
Mitsubishi Materials | High-Feed Cermet Finishing Specialist
Heavy-Duty Gloss Finishing for CNC Steel Turning
The Mitsubishi TPMN160308 NX2525 is a high-performance Cermet turning insert designed for users who need a mirror finish without compromising on cycle time. The NX2525 grade is a specialized non-coated cermet that offers incredible chemical stability, preventing the "welding" of steel to the tip. With a 0.8mm corner radius, this long-tail precision insert provides higher edge toughness than the 0.4mm version, making it the premier choice for high-gloss finishing on large steel shafts and internal boring.
NX2525 Cermet Grade | TPMN Flat-Top | 0.8mm Robust Radius
Technical Code Identification
Triangular Shape
11° Positive Relief
M-Class Tolerance
Flat-Top (No Chipbreaker)
16.5mm Edge Length
3.18mm Thick
0.8mm Radius
Cermet Grade
ISO (Metric) vs ANSI (Inch) Comparison
| Feature Spec | ISO (Metric) | ANSI (Inch Equivalent) |
|---|---|---|
| Model Number | TPMN160308 | TPMN 322 |
| Inscribed Circle (IC) | 9.525 mm | 0.375" (3/8") |
| Corner Radius | 0.8 mm | 0.0315" (1/32") |
NX2525 Cermet Advantage
NX2525 is Mitsubishi’s proprietary Cermet grade, blending the hardness of ceramic with the structural toughness of metal. Because it has a low affinity for iron-based materials, it prevents Built-Up Edge (BUE). This allows for extremely high surface speeds, ensuring a mirror finish on Steel and Cast Iron that carbide simply cannot match.
TPMN Flat-Top Strength
The TPMN series utilizes a flat-top geometry (no chipbreaker). This provides the maximum amount of material behind the cutting edge, which is essential when using cermet grades. Combined with the 0.8mm radius, this insert handles higher cutting forces and provides a significantly longer tool life in continuous steel finishing passes.
Recommended Cutting Parameters
| Material Group | Speed ($v_c$) | Feed ($f$) | DOC ($a_p$) |
|---|---|---|---|
| Mild Steel / Carbon Steel | 180 - 400 m/min | 0.10 - 0.25 mm/rev | 0.1 - 1.5 mm |
| Alloy Steel (Hardened) | 150 - 320 m/min | 0.10 - 0.20 mm/rev | 0.1 - 1.2 mm |
COMPATIBLE HOLDERS
Designed for CTFPR/L 16 or CTGPR/L 16 heavy-duty boring bars.
Shop 16mm Boring Bars →
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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.