What is auger?
An auger is a hand-operated boring tool featuring a spiral flute (helical cutting edge) designed specifically for drilling holes in wood. It consists of a T-shaped handle at the top and a screw-tipped shaft at the bottom that cuts into the wood while the spiral channel efficiently removes shavings from the hole.
Application
The auger is one of the oldest boring tools in woodworking and has been used by carpenters and joiners for centuries. Despite the widespread adoption of power tools, the auger remains a valued instrument in many workshops.
How it works: The auger is operated by turning the T-handle manually. The lead screw at the tip pulls the tool into the wood, while the helical flute carries wood chips upward and out of the hole. This design allows for deep, clean holes without the bit becoming jammed.
Common uses: Augers are still widely used in timber-frame construction, restoration of historic buildings, and situations where no electricity is available. They are ideal for boring mortise holes, dowel holes, and other traditional wood joints. Carpenters appreciate the level of control an auger offers compared to power drills, particularly in delicate or precision work.
Types and sizes: Augers come in various diameters, typically ranging from 6 to 30 millimetres (approximately 1/4 to 1-1/4 inches). Short augers are suited for fine work, while long-shaft versions can bore through thick beams. Modern auger bits are also available for use with brace drills and power drills, combining the auger’s cutting geometry with mechanical drive.
Related terms
- Brace and bit
- Twist drill
- Mortise joint
- Dowel
- Forstner bit
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