The Brace: Before the Drill Press, This Was How We Made Holes
A brace is a hand-powered drill with a crank mechanism that converts rotary motion into boring torque. It predates the electric drill by centuries and still does certain work better.
How a brace works
A brace uses a U-shaped crank (the sweep) to convert hand rotation into drilling torque. The operator presses down on the head with one hand and rotates the sweep with the other. The mechanical advantage is significant: a 10-inch sweep produces enough torque to bore a 1-inch hole through hardwood with moderate effort. The speed is slow compared to a power drill, but the torque-to-effort ratio is excellent, and the control is absolute.
The bits
Auger bits are the standard for braces. They have a lead screw that pulls the bit into the wood, cutting lips that sever the fibers, and a twist body that clears chips. The result is a clean, straight hole with smooth walls. Expansion bits bore adjustable-diameter holes. Center bits bore shallow flat-bottomed holes. Screwdriver bits turn large slotted screws. The square-taper chuck on a brace accepts all of these, making it a multi-tool before multi-tools existed.
When a brace beats a drill
A brace is silent. It requires no electricity, no battery, and no cord. It produces zero dust in an enclosed space because the cutting speed is low enough that chips fall as curls, not as airborne particles. For boring a few holes in a timber frame, driving large screws into hardwood, or working in a space without power, a brace is not a compromise. It is the right tool. There is also a quality of connection between hand and wood that a power drill removes entirely.
What to look for
A good brace has a smooth sweep with no wobble, a chuck that grips firmly with no play, and a ratchet mechanism that allows partial-turn operation in tight spaces. Stanley, Millers Falls, and North Bros. made the best American braces. Look for a sweep size of 8 to 10 inches for general use. Check the jaws of the chuck for wear: they should close evenly on a round bit and grip with no slippage. The ratchet should click cleanly in both directions.
Restoring a brace
Most estate-sale braces need only cleaning and lubrication. Remove surface rust with steel wool and light oil. Clean the chuck jaws with a wire brush. Apply a drop of machine oil to the ratchet mechanism and the head bearing. If the head does not spin freely, the bearing may need cleaning or replacement. The sweep should rotate smoothly with no grinding. Once cleaned and oiled, a brace from 1920 works exactly as well as it did new. The mechanism has no wear parts that degrade under normal use.
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