Diablo Auger Drill Bit DAG1140 1-1/8 Inch Wood Boring Tool (7-1/2 Inch Length 7/16 Hex Shank Dura-Tip Dual Edge Nail-Embedded Clean Hole Boring)

Diablo DAG1140 1-1/8" x 7-1/2" Dura-Tip Self-Feed Nail-Embedded Wood Auger Drill Bit

The Diablo DAG1140 1-1/8-inch wood auger drill bit bores large-diameter pass-through runs for electrical conduit and Schedule 40 plumbing lines, penetrates multi-ply structural timber studs, drills through heavy floor joists, and drills nail-embedded framing without binding. Measuring 7-1/2 inches in overall length with a 5-1/2-inch usable drilling depth and a 7/16-inch quick-change power hex shank, this high-speed steel boring accessory features a threaded Dura-Tip self-feeding screw point and dual precision-milled cutting spurs to slice directly through hidden fasteners. Engineered with a two-step cutting geometry that reduces rotational friction to maximize cordless battery runtime, deep high-volume flutes for rapid chip ejection, and precision Swiss craftsmanship, it provides residential electricians, plumbers, and framing contractors with clean, burr-free boring performance across demanding timber structures.

Best Used For:

• Plumbing Supply Line and Waste Pipe Rough-In: Boring 1-1/8-inch clean holes through wall studs, floor joists, and double top plates to run 3/4-inch copper, PEX, and PVC water lines.
• Electrical Service Routing and Conduit Runs: Drilling precise, chatter-free pass-through channels in multi-ply timber headers and structural beams for heavy wiring bundles and conduit.
• Nail-Embedded Remodeling and Demolition Framing: Penetrating old-growth lumber, reclaimed structural beams, and subfloor assemblies containing embedded steel framing nails without tip fracture.

Key Performance & Safety Features

• Self-Feeding Dura-Tip™ Point: Threaded lead screw draws the bit effortlessly through dry and green timber, eliminating manual feed strain while penetrating embedded framing nails.
• Dual Precision Cutting Edges: Twin scoring spurs slice clean outer hole perimeters before chip removal to prevent splintering and exit blowout.
• Two-Step Cutting Geometry: Progressive cutting profile reduces rotational torque resistance, significantly lowering battery drain on cordless drills and impact wrenches.
• Deep Chip Evacuation Flutes: Wide polished flutes quickly eject wood shavings out of deep holes to eliminate clogging and reduce friction heat.
• 7/16-Inch Quick-Change Hex Shank: Heavy-duty power hex shank provides non-slip chuck grip and locks securely into 7/16" quick-change adapters, drill chucks, and high-torque impact tools.
• High-Speed Steel Metallurgy: Premium heat-treated steel core withstands heavy torsional impact forces from compact cordless power tools.

What's Included

• (1) Diablo DAG1140 1-1/8" Diameter x 7-1/2" Length Nail-Embedded Wood Auger Drill Bit

Technical Specifications

Pro-Tip: When boring 1-1/8-inch holes through stacked wall plates or deep headers with a high-torque right-angle drill, maintain a steady perpendicular angle and allow the Dura-Tip lead screw to pull the bit naturally at moderate RPM; this technique ensures clean chip clearance and prevents motor stall.