Viking Ultra-Bor Series Type 240-UB Super Premium HSS Jobber length Number drill bits excel in demanding applications. The 135° split point design is self-centering and self-starting, preventing the drill bit from walking on the material surface and eliminating the need for a center punch or pilot hole. Black and Gold surface treatment provides additional lubricity, reduces wear and assists swarf in traveling along the flutes with less resistance as it exits the hole during drilling. Made in America using high moly alloy tool steel, the heavy-duty construction of Type 240-UB Super Premium Number Drill Bits makes them ideal for use with hard metals, work hardening grades of stainless steel, and other difficult to drill materials.
Features
Premium High Speed Steel Heavy Duty NAS 907B Jobber Bits
135° split point for accurate centering and fast penetration
Substantially longer cutting life. Nitro-carburized flute has increased Rockwell hardness
Low temperature stress relief improves lubricity and toughness
Holds tighter hole size. The split point design is self centering, limiting the normal oversize drilling characteristics
Black and Gold Surface treatment for increased lubricity and lower drilling effort
