The HR2 geometry expands Pramet’s range of single-sided inserts for machining a wide range of materials including steels, cast irons and stainless steel. Designed for rough forgings and castings, such as cylinders, shafts and large pins, the HR2 features a positive, stable geometry for improved tool life and performance. Its cutting edge design and wide peripheral land promote increased productivity, while offering reliable chip formation and evacuation at high feeds(0.7 mm/rev). This promotes a continuous production process with less machine downtime, resulting in a more cost-effective operation.

The new chip breaker compliments the existing HR insert which covers semi-roughing to roughing applications.HR2 is available with a new turning grade – T9226 – also launched by Pramet this April. The versatile T9226 grade achieves impressive results in heavy roughing and peeling operations. For these applications it replaces Pramet’s existing 6630 grade.

Providing high insert reliability and durability in adverse cutting conditions, the T9226 offers greater cutting edge strength. This is primarily due to a new functional gradient substrate which contains a higher amount of cobalt binding and finer grain structure.A special treatment added to the coating’s surface promotes reduced adhesion to the workpiece and resistance to the formation of heat-related cracks,resulting in greater operational reliability and longer tool life.In a recent example, machining P4 steel without coolant and in an interrupted cut operation, the T9226 grade lasted for 52 minutes, compared to a competitor grade which operated for just 25 minutes(cutting speed 55m per min, feed 0.8 [mm/rev] and 8mm axial depth of cut).

Chip breakers are an intrinsic part in most cutting tools because they improve chip control and reduce cutting resistance which, when properly coupled together, increases the machining performance. In order for chips to be broken into suitable lengths and not wrap around the workpiece, TaeguTec has launched two new chip breakers for the TopDrill line: the “DK” type for cast iron drilling and the “DA” type for aluminum drilling.

TaeguTec’ s current “DP” chip breaker was developed for general drilling applications whereas the new geometry “DK” type, which utilizes the TT6080 grade, improves wear resistance when machining cast iron. Both help customers reduce their operating cost and delay the development of tool wear as well as improve stability during the machining process of cast iron materials. The “DA” chip breaker is designed with a polished top face surface as well as a sharp edge to minimize cutting resistance and built-up-edges while drilling into aluminum workpieces which helps to avoid chipping and fracturing of the cutting edge normally caused by vibration. Both the “DK” and “DA” chip breakers are available in the same size range as the current “DP” geometry inserts.

During several case studies on aluminum workpieces, the “DA” transformed chips into pellet sized shards which were quickly and efficiently evacuated from the insert through the TopDill’s advanced body and flute design in order to avoid any damage to the drill or workpiece. In case studies on the “DK” chip breaker, TaeguTec’s newest offering to the highly popular TopDrill line increase tool life by as much as 88 percent while machining ductile cast iron workpieces.