Extreme Heat Resistance for Stainless and Hard Abrasive Alloys
The Rockhard Cobalt Jobber Twist Drill Bit is the ultimate high-performance tool, engineered to conquer the toughest, most challenging materials, specifically stainless steel and other abrasive, heat-generating alloys. The infusion of Cobalt in the steel alloy dramatically increases the bit's ability to withstand extreme heat, providing exceptional durability and tool life.
Material Compatibility: Essential for drilling through stainless steel, high-tensile steel, cast iron, titanium, and other hard abrasive materials.
Key Features for Maximum Hardness:
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Superior Heat Resistance: The M35 Cobalt alloy construction is designed to withstand the high temperatures generated when drilling hard metals, making it the most durable option for stainless steel applications.
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M35 HSS Composition: Manufactured from high-quality M35 High-Speed Steel, achieving a hardness rating of Rockwell 66–68. This provides unparalleled resistance to wear and abrasion.
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135° Self-Starting Split Point: The aggressive 135-degree split point is self-starting, requiring less operator pressure and instantly eliminating the need for a center punch, ensuring precise, accurate hole placement every time.
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Gold Oxide Lubricity Treatment: A durable Gold Oxide surface treatment is applied to the bit. This coating reduces friction, facilitates cooler cutting, and adds vital lubricity, which is critical when drilling gummy or tough materials like stainless steel.
When durability against heat and abrasion is non-negotiable, choose the Rockhard Cobalt Jobber Bit.
