Irwin 91140 Silver Deming Drill Bit 5/8 Inches 6 Pack

Product Description

The IRWIN INDUSTRIAL TOOL CO 91140 is a 5/8-inch Silver Deming drill bit built for heavy-duty hole cutting in metal, wood, and plastic. The bit is constructed from M-7 high speed steel, which provides strong resistance to abrasion under the stress of large-diameter drilling. A 3-flatted shank design locks securely in the chuck, reducing slippage during high-torque applications. The reduced 1/2-inch shank fits any standard 1/2-inch drill, and the overall length of 6 inches gives the operator good reach without sacrificing rigidity. This package contains 6 bits. Licensed tradespeople and skilled fabricators working through high-volume jobs will find the multi-pack format practical for keeping spare bits on hand.

The 91140 is suited for use in keyless chucks and fits all standard 1/2-inch drills. The 118-degree point geometry is appropriate for general-purpose drilling in wood, metal, and plastic. Primary applications include heavy-duty metal drilling, automotive body work, metal fabrication shops, and body shop environments where large-diameter holes are required on a regular basis. The M-7 steel construction holds up to repeated use in demanding production settings.

Key Features

• M-7 high speed steel construction for abrasion resistance during tough, large-diameter drilling
• 3-flatted shank design improves chuck grip and reduces bit slippage under torque
• Compatible with keyless chucks and all standard 1/2-inch drills
• 118-degree standard point geometry for use in wood, metal, and plastic
• 6-inch overall length with 1/2-inch reduced shank
• Package includes 6 bits for production or high-turnover shop environments

Compatibility

Designed for use in any standard 1/2-inch drill accepting a 1/2-inch reduced shank Silver Deming bit, including keyless chuck configurations.

Installation Notes

Silver Deming bits of this diameter should be installed by securing the 3-flatted shank firmly in a properly rated 1/2-inch drill chuck before operation. Always power down and unplug or de-energize the drill before changing bits. Use appropriate speed settings for the material being drilled, and wear eye protection when operating large-diameter drill bits in metal or fabrication environments.