Finishing Off Chips: Turning Performance

The addition of a new chip-breaker option to two insert lineups is billed as a boon to the finish of turning processes.

The move was made by Japan- headquar tered Tungaloy Corp., which recently announced that it has added its JS-style chipbreaker to the company’s AH6225 and AH8015 insert grade product lines. Designed for finishing operations, the JS features large inclination angles on the cutting edge and unique breaker protrusions.

The design aims to ensure effective chip control when cutting to a wide range of depths while also minimizing cutting forces in order to produce high-quality surface finishes.

Key to lowering forces on components is the chipbreaker’s 10° positive top rake angle, according to David Essex, turning product manager at Tungaloy-NTK America Inc. in Arlington Heights, Illinois. “The higher the positive top rake, the more it will shear the material and lighten the tool pressure,” Essex noted.