Stewart Fastener 18SA Ship Auger Bit 1-1/8 X 18 Inch

Product Description

The STEWART FASTENER 18SA is a ship auger bit designed for boring large-diameter holes through heavy timber, dimensional lumber, and similar dense materials. This bit measures 1-1/8 inches in diameter and 18 inches in overall length, giving tradespeople the reach needed to drill through thick structural members in a single pass. Ship auger bits are commonly used by electricians, plumbers, and general contractors when running conduit, pipe, or cable through framing or timber where standard spade bits or shorter auger bits cannot reach.

The 18SA is suited for applications requiring deep, clean-bore holes in wood substrates. Typical use cases include rough-in drilling for mechanical, electrical, and plumbing trades in new construction or retrofit work where access is limited and a long-reach bit is necessary. The 18-inch length is particularly useful when working through multiple plates, headers, or heavy timber framing without repositioning.

Key Features

• 1-1/8 inch diameter for large-bore hole requirements
• 18-inch overall length for deep-reach drilling through thick framing members
• Ship auger design provides clean, efficient material removal in dense wood
• Compatible with standard hex-shank or round-shank drill chucks used in heavy-duty drills

Compatibility

Designed for use in heavy-duty corded drills and right-angle drills capable of accepting a standard auger bit shank. Consult your drill manufacturer specifications for maximum bit diameter and length compatibility.

Installation Notes

This bit is intended for use by electricians, plumbers, and carpenters performing rough-in drilling. Secure the workpiece before drilling and use a drill with sufficient torque for large-diameter boring. Follow applicable codes such as NEC or IPC for hole sizing and placement relative to framing members. Wear appropriate eye protection and ensure the work area is clear of embedded fasteners before drilling.

Technical Specifications

• Diameter: 1-1/8 inches
• Length: 18 inches
• Bit Type: Ship Auger

Standard Information

• Brand: STEWART FASTENER
• Manufacturer Part Number: 18SA