Advantages of cutting-edge rounding

  • Reduces chipping along the edge
  • Reduces the so-called “antenna effect” in PVD coatings on sharp edges and thus reduces the stress in a coating
  • The more an edge is rounded, the thicker coating is possible
  • Higher cutting-edge stability
  • Avoids chipping of the cutting-edge as well as chipping of the coating during the machining process
  • Increase in tool life despite “blunt” cutting-edge
Cutting-edge rounding

Edge post-treatment

One of the problems that can arise without post-treatment of the surfaces is the jamming of chips. This can result in the tool, e.g., a drill, breaking.

Objectives of the edge post-treatment

  • Removal of droplets after PVD coating
  • Reduction of surface roughness
  • Improved chip-flow for cutting tools

If the post-treatment is too strong, the cutting-edge can be exposed. This leads to:

  • Immediate, full, and direct contact of the cutting-edge with the workpiece material
  • Low heat and chemical insulation
  • Low coating thickness near the cutting-edge
  • A larger cutting radius, which creates a larger area without a coating
  • The impression of a defective PVD coating
Different materials and tools therefore require different methods for edge pre- and post-treatment.

The most common edge pre-treatment methods are:

  • Dry blasting
  • Wet blasting
  • Drag finishing
  • Brushing
  • Magnet finish

The most common post-treatment methods are:

  • Wet blasting
  • Drag finishing
  • Polishing blasting

PLATIT has a broad expertise in edge pre- and post-treatment for PVD coating. We offer and integrate all the products necessary for the turnkey system.

For more information on pre-treatment and post-treatment procedures, see our compendium on pages 101 to 105 and on page 109 by clicking here or contact us directly.