Accupro 75474981 Turning Insert DCMT21.51 Carbide Cvd

Product Description

The ACCUPRO 75474981 is a DCMT-style carbide turning insert designed for precision lathe and turning center operations. Identified by ANSI code DCMT21.51 and ISO code DCMT070204, this insert features a 55-degree diamond (rhombic) shape with a positive side clearance and a 7-degree relief angle. The CVD coating and ACP35M grade deliver high wear resistance with sufficient toughness for demanding cuts. With a 0.40 mm (0.0157 inch) corner radius and a maximum depth of cut of 3.00 mm (0.1181 inches), it suits finishing to moderate stock-removal passes. Machinists and CNC operators install these inserts in compatible DCMT toolholders secured by a screw-lock holding method.

This insert is rated for steel (P), stainless steel (M), and special and super alloys (S) workpiece materials, covering a broad range of production turning applications. Residential and commercial machine shops, job shops, and production facilities running CNC lathes or manual turning centers will find this insert appropriate for general-purpose turning where controlled wear and consistent edge life are priorities. The WM+ chip breaker geometry supports reliable chip control across the rated material categories.

Key Features

• DCMT diamond (rhombic) insert shape with 55-degree included angle for versatile turning profiles
• CVD coating on ACP35M carbide grade balances wear resistance and toughness
• Rated for steel (P), stainless steel (M), and special and super alloys (S) workpiece materials
• Positive side clearance reduces cutting forces and minimizes workpiece deflection
• WM+ chip breaker geometry promotes consistent chip evacuation
• Screw-lock holding method for secure, repeatable insert positioning
• 2 cutting edges per insert maximize tooling value

Compatibility

Designed for use in DCMT-style screw-lock turning toolholders accepting ANSI size code 21.51 (ISO size code 070204) inserts with a 0.1102-inch hole diameter and a 0.2500-inch inscribed circle.

Installation Notes

Installation is performed by qualified machinists or CNC operators. Power down and lock out the machine spindle before seating or replacing inserts. Use the appropriate torx or hex key to secure the clamping screw to the toolholder manufacturer specification - do not over-torque. Inspect the toolholder seat and clamp for wear or debris before seating a new insert to ensure proper edge registration.