A marking gauge, also known as a scratch gauge,[1] is used in woodworking and metalworking to mark out lines for cutting or other operations.[2] The purpose of the gauge is to scribe a line parallel to a reference edge or surface. It is used in joinery and sheetmetal operations.
The gauge consists of a beam, a headstock, and a scribing or marking implement, typically a pin, knife, pen or wheel. The headstock slides along the beam, and is locked in place by various means: a locking screw, cam lever, or a wedge. The marking implement is fixed to one end of the beam.
- ^ International Textbook Company (1903), International library of technology, vol. 31, International Textbook Company, p. 11.
- ^ Tolpin, Jim (2007), Measure Twice, Cut Once (3rd ed.), Popular Woodworking Books, p. 64, ISBN 978-1-55870-809-9.