Disston Company 571224 Cobalt Hss Drill Bit 1/8 Inch

Product Description

The DISSTON COMPANY 571224 is a 1/8-inch diameter cobalt high speed steel (HSS) drill bit built for cutting through hard and abrasion-resistant metals. The 135-degree split point geometry features four cutting edges that initiate contact quickly and eliminate bit walking on smooth or curved surfaces. An 8 percent cobalt content increases heat resistance, allowing the bit to maintain cutting efficiency at temperatures exceeding 1,000 degrees F. Jobber length and a straight shank make it compatible with standard drill chucks. HVAC technicians, plumbers, and electricians reach for cobalt bits when working with hardened brackets, stainless fasteners, and structural steel.

This bit is designed for drilling in hard metals including heat-treated steel, stainless steel, chrome alloy steel, manganese steel, titanium, and armor plate. The jobber-length profile suits general-purpose hole-making tasks in the field and in the shop. It is sold individually on a retail card, making it a practical single-piece replacement or addition to a trade tool kit.

Key Features

• 8 percent cobalt content delivers heat resistance above 1,000 degrees F for sustained cutting in hard metals
• 135-degree split point with 4 cutting edges reduces thrust and prevents bit walking on entry
• High speed steel base material provides toughness and durability under load
• Jobber length and straight shank fit standard 3-jaw drill chucks without adapters
• Suitable for heat-treated steel, stainless steel, titanium, manganese steel, and chrome alloys

Compatibility

Designed as an OEM-style replacement or supplemental cobalt drill bit for use in standard straight-shank drill chucks across corded and cordless drills and drill presses.

Installation Notes

A licensed technician or experienced tradesperson should use appropriate RPM settings when drilling hard metals — lower speeds with consistent feed pressure reduce heat buildup and prolong bit life. Secure the workpiece firmly before drilling to prevent movement. Use cutting fluid or oil on stainless steel and titanium to manage heat and extend bit life. Inspect the cutting edges before each use and replace the bit if chipping or dullness is observed.