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The marking implement is chosen depending upon the operation to be performed. Some marking gauges have the capability to allow a number of implements to be fitted, others do not; and a woodworker will often have a number of different types. A steel pin is used when scribing with the grain. A steel knife is used when scribing across the grain.
A wood scribe is a tool for marking wood by scratching the surface visibly. A wood scribe is often used with a try square for accurate scribing. A marking gauge is a more specific form of wood scribe used to accurately mark wood for cutting, often for laying out mortise and tenon joints.
Like the simpler marking gauge, a mortise gauge has a locking thumb screw slide for adjusting the distance of the scribe from the edge of the wood. It has two protruding pins, often called "spurs", [ 3 ] which are designed to scribe parallel lines marking both sides of a mortise at the same time. [ 4 ]
A marking knife or striking knife is a woodworking layout tool used for accurately marking workpieces. [1] It is used to cut a visible line, which can then be used to guide a hand saw , chisel or plane when making woodworking joints and other operations. [ 2 ]
In Europe, the earliest known wooden ard (at Lavagone in Italy) dates from around 2300–2000 BC, but the earliest scratch marks date from 3500–3000 BC. [8] All of these were bow ards, also depicted in the rock drawings of Bohuslän , Sweden, Copper Age stelae of Valcamonica (3000–2200 BC) and Fontanalba , France.
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The scratch awl is basically a steel spike with its tip sharpened to a fine point. The tip of the spike is drawn across the timber, leaving a shallow groove. It may also be used to mark a point by pressing the tip into the timber. [2] It is generally used when dimensioning and for laying out with the grain. It may also be used across the grain.
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