Eureka 12.5 mm Cobalt Drill Bit – Q:1 Jobber Length for Metal (Model 4AE60U)

Constructed from M35 high-speed steel with a 5% cobalt blend, this Eureka 12.5 mm drill bit delivers exceptional hardness and heat resistance when drilling through stainless steel, carbon steel, cast iron, and other tough metals. The jobber-length design ensures versatility for both portable and bench drill presses. With precision-ground flutes and point geometry, it offers high accuracy, efficient chip removal, and clean hole finishes. Ideal for professional metalworkers and serious DIYers. 



General/Technical Specifications

• Shipping Weight: ~200 g (estimated typical weight in packaging)
• Shipping Dimensions: ~135 mm (Length) × 13 mm (Width) × 13 mm (Height) in blister or sleeve packaging
• Material: M35 cobalt high-speed steel
• Shank Type: Straight cylindrical shank, fits standard 13 mm chucks
• Diameter: 12.5 mm (0.492″)
• Overall Length: Approx. 135 mm (Jobber length)
• Flute Length: ~90 mm (typical for this design)
• Point Angle: 135°, split or standard depending on batch
• Coating/Finish: Natural bright finish (uncoated)—optimal for metal
• Hardness: ~HRC 63 (due to cobalt alloying)