Disston Company 119909 Hss Black Oxide Drill Bit 9/64 in

Product Description

The DISSTON COMPANY 119909 is a high speed steel (HSS) black oxide jobber-length drill bit designed for fast, accurate drilling across a wide range of common materials. It measures 9/64 inch in diameter and 2-7/8 inches in overall length with a straight shank. The 135-degree split point features four cutting edges that prevent the bit from walking on contact, eliminating the need for a center punch in most applications. The black oxide tempering treatment reduces frictional heat buildup and promotes smooth chip evacuation, extending service life during repetitive drilling tasks.

This bit is suited for use in residential and light commercial trade work where a reliable general-purpose drill bit is needed. Recommended materials include wood, plastic, wallboard, plywood, soft metals, aluminum, brass, and bronze. It can also be used occasionally in stainless steel and other hard metals, though it is not optimized for continuous hard-metal drilling. Electricians, plumbers, HVAC technicians, and general contractors will find it useful for everyday penetration tasks during installation and service work.

Key Features

• 135-degree split point with four cutting edges prevents walking and speeds entry
• High speed steel construction provides hardness and durability across multiple materials
• Black oxide tempering treatment reduces friction and improves chip flow
• Jobber length at 2-7/8 inches suits standard drill chucks and close-quarter access
• Straight shank compatible with standard keyless and keyed drill chucks
• Suitable for occasional use in stainless steel and other hard metals

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with standard 3/8-inch and 1/2-inch keyed or keyless drill chucks used across trades for drilling wood, plastic, wallboard, plywood, soft metals, aluminum, brass, bronze, and occasional hard metals.

Installation Notes

This bit is installed and operated by a licensed tradesperson or experienced mechanic using a standard corded or cordless drill. Ensure the drill is powered off and the chuck is fully tightened before use. Do not exceed the recommended speed range for the material being drilled, and apply consistent, moderate feed pressure to avoid overheating the tip. Replace the bit if the cutting edges show visible wear or the point becomes rounded, as a dull HSS bit generates excess heat and reduces hole quality.