9 ROTARY BURRS – SURFACE AND TREATMENTS COATINGS NAVIGATOR Surface Treatments Bright Bright finish (uncoated surface) improves chip flow in soft or non-ferrous materials and maintains sharp cutting edges in abrasive (uncoated) Bright materials. Surface Coatings Titanium Aluminium Titanium Aluminium Nitride is a multi layer ceramic coating applied by PVD coating technology, which exhibits high toughness and Nitride Coating oxidation stability. These properties make it ideal for higher speeds and feeds, while at the same time improving tool life. TiAlN is used in (TiAlN) drilling, tapping, and milling applications and can be suitable for use when machining without coolant. 223