1/2 in. M42 Cobalt Short Twist Drill Bit (6-Piece)

Drill America D/ASTCO Series Screw Machine (Stub Length) M42 cobalt drill bits are manufactured to National Aerospace Standard 907. Ideal for portable or machine drilling. Short, rugged construction performs well in high tensile strength materials like PH stainless steel, inconel and titanium. The 135 split point is self-centering and reduces thrust. Sizes smaller than 1/16 in. have the 118 standard point.Effective in drilling tough, high tensile strength materials like stainless steel, inconel and titaniumRugged, shorter overall lengthDisplay high red hardness, permitting speeds up to 30% greater than with conventional M2 high speed steelM42 cobaltGold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools, performance is similar to uncoated tools135 split point for self-centering and reducing thrustManufactured to National Aerospace standard 907