Irwin Industrial Tool Co 49910 Solid Center Auger Bit

Product Description

The IRWIN INDUSTRIAL TOOL CO 49910 is a 5/8 inch solid center auger bit engineered for boring clean, precise holes in wood. The solid center construction adds rigidity along the full length of the bit, reducing flex and deflection during heavy-duty boring operations. At 7-1/2 inches overall length with a 4-1/2 inch twist length, this bit handles typical framing, rough carpentry, and electrical rough-in tasks where electricians and carpenters need consistent hole diameter and straight entry. Full-length heat treatment strengthens the twist at high-stress zones, extending service life in demanding jobsite conditions.

This auger bit is suited for residential and light commercial construction applications involving wood boring. Electricians use bits in this class for drilling through studs and joists during rough-in wire runs. Carpenters and general contractors reach for solid center auger bits when straight, consistent holes are required in both hard and soft wood species. The coarse screw point pulls the bit forward for fast, controlled starts without pre-drilling. The single spur cutting edge scribes the hole circumference before the main cutting edge engages, producing a cleaner sidewall finish.

Key Features

• Solid center design provides extra rigidity and reduces deflection while boring
• Full-length heat treatment guards against bending in heavy-duty applications and strengthens the twist at high-strain zones
• Wide lands keep the bit tracking straight through the full depth of the bore
• Flutes ground behind the lands channel chips to the inside of the bit, away from the outer diameter for a faster, cleaner cut
• Single spur cutting edge scribes the hole circumference for a smoother finish
• Coarse screw point enables fast starting and consistent feed rate in hard and soft woods

Compatibility

Designed as a standard-shank solid center auger bit compatible with hand braces and power drills accepting auger-style bit shanks, suitable for use in hard and soft wood materials.

Installation Notes

Installation is performed by carpenters, electricians, and general contractors using a hand brace or power drill. Ensure the chuck is fully tightened before use and that the workpiece is secured to prevent movement during boring. When boring through structural members, follow applicable building codes regarding hole size and placement relative to member depth. Inspect the bit for damage before each use and replace if the screw point or spurs show excessive wear.