Dormer Pramet broadens machining inserts

DORMER Pramet has developed new inserts with positive NF geometry and new wiper inserts with W-MR geometry.

These new additions boost the company’s portfolio for machining stainless steel, which already comprises a wide range of indexable and rotary products. The launches form part of a wider product launch conducted last April 1, the first combined unveiling since Dormer and Pramet merged last year.

The double-sided inserts with positive NF geometry, which will be marketed under the Pramet brand, are suitable for finishing to medium turning of stainless steel, low carbon steel, and super alloys. The inserts’ low radial cutting force values make them ideal for unstable machining and will be of interest to companies performing general turning applications.

Dormer Pramet offers more than 110 variations in insert shapes (C, D, S, T, V and W), sizes, and grades.  

According to product manager for turning Josef Bittner, “The balanced shape of the chipbreaker provides a stable and sharp cutting edge, with a large area for chip formation and evacuation from the cutting zone. Also, its positive geometry allows for low cutting forces and minimizes vibration occurring. A combination of all these features promotes insert durability and reliability, enabling good productivity and a quality machined surface finish for the end user.”

Meanwhile, the new wiper inserts for turning with W-MR geometry are available in CNMG12, DNMG15, and WNMG06 and 08 versions. The W-MR is suitable for longitudinal and face turning of steel, stainless steel, and cast iron.

In addition to a positive chipbreaker, the double-sided inserts have a new shape on the smoothing edge to achieve low roughness in turning. This lowers cutting forces while increasing feeds, which boost productivity while ensuring the same surface finish produced with standard inserts. With correct use, they can eliminate the need for grinding.