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GNMG & FNMG Inserts for better chip control during profile turning

By Niraj M Wanikar, Chief Editor, CNCTimes.com, 2021-06-15 11:12:00

Tungaloy has expanded its economical ISO-EcoTurn turning insert and toolholders system by adding GNMG insert with a 70 degree nose angle and FNMG insert with a 45 degree nose angle.

With conventional CNMG or DNMG turning inserts, chip jamming and re-cutting can be a common challenge during profile turning or face turning processes when the cutting is performed in the direction away from the work center in one continuous path.

ISO-EcoTurn’s new GNMG and FNMG inserts each features a reduced nose angle of 70 degrees and 45 degrees, compared with traditional CNMG and DNMG inserts. The increased clearance on the cutting edge allows better chip flow and reduced chip re-cutting issues when face turning the wall. Reduced nose angle also contributes to lower cutting force, minimizing unpredictable tool failure and chatter during machining.

The new inserts include two chipbreaker styles: TM for general purpose applications and TSF for finish turning. The inserts are offered in the new generation of CVD grades for steel turning: T9215 and T9225, along with AH8015, a PVD grade for high temperature alloys.

The new GNMG and FNMG inserts can be mounted on a standard turning toolholder for CNMG or DNMG inserts. Even though the new inserts feature reduced nose angles on both ends, the central part of the insert body has the identical size and shape as CNMG or DNMG. This eliminates the need to invest in new toolholders.

Total of 39 inserts have been added in this expansion.

 

Product information
No. 426S3-G (Metric)

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