Irwin Industrial Tool Co 49916 Solid Center Auger Bit 1 Inch

Product Description

The IRWIN INDUSTRIAL TOOL CO 49916 is a 1-inch solid center auger bit designed for boring clean, straight holes in wood. It features a 4.5-inch twist length and a 7.5-inch overall length, making it suitable for both rough framing and finish carpentry applications. The solid center construction provides extra rigidity during boring, reducing deflection under load. Full-length heat treatment strengthens the twist along the entire bit body, guarding against bending in heavy-duty use. This bit is used by carpenters, electricians, and plumbers who need accurate through-holes in wood framing and structural members.

The 49916 is suited for residential and light commercial wood boring tasks where hole quality and bit durability matter. Wide lands keep the bit tracking straight as it advances through the material. The flutes are ground behind the lands to channel chips inward and away from the outside diameter, reducing binding and producing a faster, cleaner cut. A coarse screw point provides aggressive feed in both hard and soft woods. This bit is packaged and sold as a single unit.

Key Features

• Solid center construction delivers extra rigidity and reduces flex while boring
• Full-length heat-treated body resists bending under heavy-duty load
• Wide lands keep the bit aligned straight through the bore
• Flutes ground behind the lands funnel chips away from the outside diameter for a faster, cleaner cut
• Single spur cutting edge scribes the hole circumference for a smoother finish
• Coarse screw point for fast, aggressive feed in hard and soft woods

Compatibility

Designed as a standard 1-inch auger bit for use with brace-style hand tools and compatible power auger drivers commonly used in wood framing and rough-in applications.

Installation Notes

This bit is typically used by carpenters, electricians, and plumbers during rough-in phases to bore holes through wood framing for wire, pipe, or conduit passage. Ensure the bit is fully seated and secured in the chuck before operation. Allow the screw point to self-feed and avoid forcing the bit, as excessive lateral pressure can cause premature wear. Inspect the bit for bending or tip damage before each use.