Sumitomo 1655FDW Turning Insert DNMA432 Pcd DA90

Product Description

The SUMITOMO 1655FDW is a DNMA-style turning insert designed for precision machining of aluminum and non-ferrous materials. It carries the DA90 manufacturer grade, which is formulated for high wear-resistance in non-ferrous cutting applications. The insert is made from PCD (polycrystalline diamond) substrate and features a 55-degree diamond (rhombic) shape with a neutral hand orientation and no chip breaker. With an inscribed circle of 0.5000 inches (12.70 mm) and a corner radius of 0.80 mm, this insert suits finishing and light material removal passes where edge sharpness and surface finish are critical. Machinists and CNC operators working with aluminum, copper, and other non-ferrous workpieces install this insert in compatible DNMA-style toolholders.

This insert is suited for turning operations on aluminum and non-ferrous metals in both production and job-shop environments. The ANSI insert code is DNMA432 and the ISO insert code is DNMA150408, making it straightforward to cross-reference against existing toolholder setups. The negative side clearance and M tolerance code are consistent with standard precision-ground insert specifications. The maximum depth of cut is 0.50 mm, indicating this insert is optimized for finishing passes rather than heavy roughing. It is held in the toolholder via pin and clamp methods, which is standard for this insert geometry.

Key Features

• PCD (polycrystalline diamond) insert material for high wear-resistance on non-ferrous workpieces
• DNMA432 ANSI geometry with 55-degree diamond shape and neutral hand orientation
• DA90 grade optimized for aluminum and non-ferrous (N) material group applications
• Corner radius of 0.80 mm suitable for controlled finishing cuts
• No chip breaker design for clean, open cutting geometry on soft, ductile materials
• Pin and clamp holding method compatible with standard DNMA toolholder systems

Compatibility

Designed for use in DNMA-style turning toolholders that accept the ANSI size code 432 (ISO size code 150408). The insert is intended for machining aluminum and non-ferrous materials and is not rated for ferrous workpiece applications.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the toolholder is securely locked before seating or indexing the insert. Use the appropriate torx or hex key to the toolholder manufacturer's specified clamping procedure when engaging the pin and clamp retention. Inspect the insert seat and clamp for debris or damage before each use to maintain proper seating and cutting geometry.