VIKING HSS FRACTIONAL DRILL

Type 240-UB

NAS 907B Super Premium - 135˚ Split Point
• Nitro-Carburized
• Magnum will substantially outperform cobalt drills in work hardening
 stainless steel and other tough drilling applications.
Type 240-UB
Low temperature stress relief improves lubricity and toughness

High speed steel (HSS) is a form of tool steel; high speed steel bits are hard, and much more resistant to heat than high carbon steel. They can be used to drill metal, hardwood, and most other materials at greater cutting speeds than carbon steel bits, and have largely replaced carbon steels. 

A Ultra Bor Super Premium drill with its thin web will penetrate the work hardening stainless fast enough to continually cut beneath the chip which is hardening from deformation. This means the drill is cutting softer steel. The cobalt drill, with its thick web, cannot be fed at a fast enough rate to cut beneath the area which is hardening. As a result the cobalt drill is continually drilling into hardened steel.

QUALITY at Viking Drill and Tool begins with the finest tool steel we can buy and ends with the world class products in our catalog. Our cutting tools are designed, engineered and superbly crafted to provide long lasting durability. Our 74,000 square foot St. Paul, Minnesota manufacturing facility is specifically designed for the unique task of efficient high quality cutting tool manufacturing.

CONSISTENCY is a natural by-product of our experience and dedication to quality. At Viking Drill and Tool, skilled machine operators working with the world’s finest raw materials have the capability of providing you with consistent high quality products time after time, year after year. On our Ultra Bor™ Super Premium products, we routinely cut recognized tool tolerance standards by one half to insure that our customers receive drills manufactured to the tightest possible specification and utmost in consistency and accuracy.

All materials used at Viking Drill and Tool meet the rigorous qualifications of National Aerospace Standard (NAS) 907. This standard, recognized as the most stringent in the industry precludes the use of lower quality steels which do not hold up under rigorous applications. The use of these extreme high quality materials insures that consistency is built in to every one of our U.S. manufactured products.