Viking Drill and Tool St. Paul MN
America's Finest High-Speed Steel Cutting Tools™

Proudly Manufactured in the USA

Silver & Deming Cobalt 1/2" Reduced Shank

Type 280-D Silver & Deming Cobalt 1/2" Reduced Shank 135° Split Point
Type 280-D Cobalt 1/2" Reduced Shank 135° Split Point


Gold Oxide – use in drilling hard tough metals,
     free machining stainless steel, high temperature alloys, titanium.
— High red hot hardness of cobalt steel permits speeds 30% higher than
     regular high speed steel drills.
Cobalt increases the strength of the steel and makes it more heat-resistant.
— Cobalt drills require rigidly held, positive feed drilling equipment.
Proudly manufactured in the USA.


Adobe Acrobat Logo PDF — Silver & Deming Cobalt 1/2" Reduced Shank

 


 

Coatings for High Speed Steel
One of the more recent developments in coatings for High Speed Steel is Titanium Nitride is a bright gold ceramic coating applied to metallic surfaces by the physical vapour deposition (PVD) process. Titanium Nitride is widely used to extend the life of a cutting tool, significantly improve the tool life and performance of cutting tools, where a cost effective reduction in tool wear is required. This coating is known to allow the tool to be used at higher operating speeds. Cutting tool life can be extended by as much as three times, and operating speeds can be increased up to 50%.