Dormer Pramet has added new chip breakers to its turning ranges.
The negative NRM turning chip breaker is for roughing and semi-roughing of stainless steel and low alloy steel. Launched under the company’s Pramet brand, NRM is available for both double-sided and large single-sided inserts.
It has been designed for continuous and mass levels of production, offering consistent performance and high feeds. However, the NRM has excellent chip-breaking properties and can also be used for roughing of stainless steel even at lower feeds, without the risk of work hardening.
Its positive geometry with a wide T-land offers a broad depth of cut and promotes good chip evacuation in a wide number of applications.The chip breaker is available in grades T7325, T7335 and T9315.
The NRM enhances Pramet’s existing range of turning chip breakers for stainless steel, including the NMR for medium to roughing operations, NM for medium turning and NF for finishing to medium turning.
In a recent test, machining M group material DIN 1.4301, the NRM on the CNMG insert with T7335 grade, achieved a 60% longer tool life than a competitor equivalent.
For more information, please contact Spectra Carbide Tooling Technology – Tel: 0860 23 23 23
