Disston Company 571265 Cobalt Hss Drill Bit 1/4in X 4in

Product Description

The DISSTON COMPANY 571265 is a 1/4-inch diameter by 4-inch length cobalt high speed steel jobber-length drill bit designed for cutting through hard and abrasion-resistant metals. Built with an 8 percent cobalt content, the bit maintains cutting efficiency at temperatures exceeding 1,000 degrees Fahrenheit, making it suitable for demanding metal fabrication and maintenance work. The 135-degree split point features four cutting edges that allow fast penetration and prevent the bit from walking on contact. The straight shank provides compatibility with standard drill chucks used by mechanics, machinists, HVAC technicians, plumbers, and electricians.

This drill bit is intended for professional use in applications requiring reliable performance in hard metals. Recommended materials include heat-treated steel, stainless steel, chrome, manganese steel, titanium, and armor plate. The jobber-length configuration makes it well suited for general-purpose through-hole drilling in sheet metal, structural components, and mechanical assemblies encountered in residential and commercial trade work.

Key Features

• 8 percent cobalt content provides heat resistance and cutting efficiency above 1,000 degrees Fahrenheit
• 135-degree split point with four cutting edges reduces walking and improves bite on hard surfaces
• High speed steel construction delivers durability across repeated drilling cycles
• Jobber-length body offers a versatile reach for most standard drilling tasks
• Straight shank fits standard 3-jaw drill chucks without adapters
• Rated for use in stainless steel, heat-treated steel, chrome, manganese steel, titanium, and armor plate

Compatibility

Designed as a general-purpose cobalt HSS drill bit for use with standard drill chucks in hand drills, drill presses, and magnetic drills across trade and mechanical applications.

Installation Notes

Secure the straight shank fully in the chuck before drilling and verify chuck key is removed prior to powering the tool. Use cutting fluid or lubricant when drilling stainless steel or heat-treated steel to extend bit life and reduce heat buildup. Allow the bit to cool naturally between deep cuts — do not quench in water, as rapid cooling can cause brittleness. Always wear appropriate eye protection and secure the workpiece before beginning any drilling operation.