New Product — Gesac’s PR Geometry for New Generation Steel Turning Series

Following our previous introduction to the PL chipbreaker for semi-finishing and finishing steel turning — designed for shallow cutting depths to resolve chip entanglement that scratches workpiece surfaces during soft steel machining — Gesac now presents its all-new PR chipbreaker engineered exclusively for rough turning. This chipbreaker addresses two core pain points in rough machining: rapid rake face wear caused by chip clogging, and delivers exceptional chipping resistance to sustain stable cutting under heavy roughing conditions.                                                                        

1  Design Highlights

• Wide Flat Cutting Edge
  Strengthens edge toughness and prevents unexpected insert chipping under unstable cutting conditions.
• Expanded Chip Evacuation Groove
  Boosts chip accommodation capacity to eliminate chip jam at large depths of cut and feed rates, lowering rake face abrasion.
• Integrated Large Chip Breaker Step
  Consistently delivers reliable chip breaking performance across all rough turning scenarios.

2  Application Range

The PR chipbreaker is optimized for rough turning, especially suited for heavy roughing under unstable cutting conditions. The applicable machining window is shown below:

3  Application Cases

Benchmark tests were carried out with PR chipbreaker inserts paired with grade GPT6230 for the continuous outer diameter and interrupted end face machining of steering knuckles.

Gesac’s new steel turning line includes multiple application-specific chipbreakers tailored to diverse cutting conditions. In our next article, we will dive deeper into the design highlights and applicable scenarios of other chipbreakers in this series — stay tuned!