The Marking Gauge: Your Layout Secret Weapon

The marking gauge creates consistent parallel lines from an edge. It’s one of the most underused layout tools in many shops.

Gauge Types

Wheel gauges use a rotating cutter that slices fibers cleanly. They excel on cross-grain work and leave crisp lines for chisel work.

Pin gauges scratch a line with a pointed steel pin. Simple and effective, though they tear cross-grain fibers.

Mortise gauges have two pins for marking both sides of a mortise in one pass.

Setting Up

Set the fence distance by measuring from the cutter to the fence face. Use a combination square or ruler for accuracy.

Lock the fence firmly. Test on scrap before marking good stock. Adjust until the line lands exactly where needed.

Making Clean Lines

Hold the fence tight against the reference edge. Tilt the gauge slightly away from you so the cutter leads.

Make one confident pass. Multiple light strokes create fuzzy lines. Let the tool do the cutting.

For deep lines in joinery work, score once then deepen with a second firm pass.

Maintenance

Keep the cutter sharp. A dull gauge tears rather than cuts. Hone wheel cutters on a fine stone. Replace worn pins.