Mortice Gauge

A mortise gauge is a woodworking tool used by a carpenter or joiner to scribe mortise and tenon joints on wood prior to cutting. Mortise gauges are commonly made of hardwood[1] with brass fittings.[2]

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”,[2] which are designed to scribe parallel lines marking both sides of a mortise at the same time.[3] One of the pins is adjustable, attached to a sliding fence,[4] so that mortises of different widths can be marked.[1]

Some mortise gauges are designed with one retractable spur, so that they can be used as marking gauges as well;[5] however, because the mortise gauge is an expensive and high precision tool, many carpenters prefer to have a separate marking gauge for general use.[4]

For complex joints, some mortise gauges have a double-beam design which allows the gauge to be wrapped around a tool such as a chisel for extra accuracy.[6]


  • ^ a b Woodwork: A Step-by-Step Photographic Guide to Successful Woodworking. DK Publishing. 19 April 2010. pp. 38–. ISBN cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:”””””””‘””‘”}.mw-parser-output .citation .cs1-lock-free a{background:url(“//”)no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url(“//”)no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url(“//”)no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url(“//”)no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
  • ^ a b The Mortise Gauge. Technology Student
  • ^ What is MORTISE GAUGE? definition of MORTISE GAUGE (Science Dictionary). The Science Dictionary
  • ^ a b New Track Media (April 1998). American Woodworker. New Track Media. pp. 47–. ISSN 1074-9152.
  • ^ A Short Guide to Mortise and Marking Gauges. Tools for Working Wood
  • ^ Jim Tolpin (2 July 2007). Measure Twice, Cut Once: Simple Steps to Measure, Scale, Draw and Make the Perfect Cut-Every Time. Popular Woodworking Books. pp. 86–. ISBN 1-55870-809-X.