Irwin Industrial Tool Co 49907 Solid Center Auger Bit 7/16 in

Product Description

The IRWIN INDUSTRIAL TOOL CO 49907 is a solid center auger bit designed for boring clean, accurate holes in wood. Built to the I-100 standard, this bit features a 7/16-inch diameter, a 4-1/2-inch twist length, and a 7-1/2-inch overall length. The solid center construction provides extra rigidity during boring, reducing deflection under load. Full-length heat treatment strengthens the twist along the entire shank, guarding against bending in heavy-duty applications where strain is highest. Carpenters, electricians running wire, and plumbers drilling through framing rely on this style of bit for consistent, repeatable results in structural and rough-in work.

The 49907 is suited for both hard and soft wood boring applications. The coarse screw point pulls the bit into the material quickly, making it effective in framing lumber, dimensional stock, and engineered wood products. Wide lands keep the bit tracking straight as it progresses through the hole, while the flutes are ground behind the lands to channel chips toward the inside of the bit and away from the outer diameter. This chip-clearance geometry reduces friction and produces a faster, cleaner cut. The single-spur cutting edge scribes the circumference of the hole before removal of material, resulting in a smoother finished bore wall. The bit ships pouched and is sold in a package quantity of 6.

Key Features

• Solid center construction provides extra rigidity and resists deflection during boring
• Full-length heat-treated steel guards against bending under heavy-duty strain
• Wide lands maintain straight tracking through the full depth of the bore
• Flutes ground behind the lands funnel chips inward, reducing friction and improving cut speed
• Single-spur cutting edge scribes the hole circumference for a cleaner, smoother finish
• Coarse screw point for fast self-feeding action in hard and soft woods

Compatibility

Designed as an OEM-style solid center auger bit for use with standard brace-style and compatible power drill chucks that accept auger bit shanks in residential and commercial wood-framing applications.

Installation Notes

This bit is installed by licensed electricians, plumbers, and carpenters for drilling through wood framing during rough-in work. Ensure the chuck is fully secured before operating. When boring through structural members, verify local building codes regarding minimum remaining wood thickness to maintain structural integrity. Inspect the bit for cracks or deformation before each use, and do not use a damaged bit.