Accupro 75283861 TNMG432 Carbide Turning Insert ACP25M

Product Description

The ACCUPRO 75283861 is a TNMG432 indexable carbide turning insert designed for general-purpose external and internal turning operations on CNC lathes and turning centers. Built to ANSI code TNMG432 and ISO code TNMG220408, this insert features a triangular shape with a 60-degree included angle, a 0.40 mm (0.0157 inches) corner radius, and a CVD coating applied to a ACP25M carbide grade. With six cutting edges per insert and a negative side clearance geometry, it delivers high material removal efficiency and consistent tool life across a range of workpiece materials including steel, stainless steel, and cast iron.

This insert is suited for machining applications in production turning environments where wear resistance and toughness balance are critical. The WM+ chip breaker geometry supports moderate to heavy cutting passes on steel (P), stainless steel (M), and cast iron (K) workpiece materials. It is a neutral-hand insert, making it compatible with both left- and right-hand toolholders. Machinists and CNC operators working in job shops, production facilities, or maintenance machining will find this insert applicable across a broad range of turning scenarios.

Key Features

• CVD-coated ACP25M carbide grade for high wear resistance on steel, stainless steel, and cast iron
• TNMG432 triangular insert with 60-degree included angle and six usable cutting edges
• WM+ chip breaker supports a range from high wear-resistance to moderate toughness depending on material
• Negative side clearance (clearance code N) with tolerance code M for consistent seating in the toolholder
• 0.40 mm corner radius minimizes insert chipping on interrupted or variable-depth cuts
• Compatible with clamp, lever lock, pin, and screw insert holding methods

Compatibility

Designed as an OEM-style replacement turning insert for TNMG432 toolholders using clamp, lever lock, pin, or screw holding methods. Also referenced under ANSI code TNMG431 and ISO code TNMG220404 as noted in manufacturer specifications.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before indexing or replacing inserts. Ensure the toolholder seat and clamp surfaces are clean and free of chips before seating the new insert. Follow the toolholder manufacturer torque specifications for the clamping screw or lever lock mechanism.