Oerlikon Balzers offers Balinit Pertura optimised nanostructure drill coating
1 min read
According to Oerlikon Balzers, the optimised nanostructure of its Balinit Pertura coating makes it ideal for high performance solid carbide drills. It is claimed to improve abrasion resistance and extend tool life at both moderate and high speeds whether drilling holes in steel, stainless steel or cast iron.
Cracks in multilayer coatings can tend to wander along boundary lines between layers approximately 100 to 400 nm thick. With a much tighter nanolayer construction of between 5 to 20 nm thick, crack propagation is significantly reduced, explains Oerlikon Balzers, delivering notably longer tool life, even in dry drilling or deep-hole drilling applications.
Other benefits of improved abrasion resistance cited for the Balinit Pertura coating are smoother chip evacuation and reduced tool and machine stress levels. Tests carried out by the coating manufacturer in steel at both moderate and high drilling speeds showed productivity increases were of the order of between 20 and 40%. Machining time to produce 500 holes in cast iron was cut in half.
Oerlikon Balzers provides a worldwide service for contract coating and supplies coating equipment for companies operating their own in-house tool coating centres. Two recoating options are possible. In decoating, once the worn coating has been removed from the substrate, the new coating is applied to the appropriate surfaces. A less expensive overcoating process consists of regrinding the worn tool only at the functional surfaces, after which the entire drill is coated again.
