A marking gauge is one of the most-used tools in hand tool woodworking — and one of the most underestimated. Once you know how to set and use one accurately, your joinery will improve immediately. This guide covers everything a beginner needs to know.
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What Is a Marking Gauge?
A marking gauge scribes a line parallel to an edge or face of a piece of timber. It consists of a beam, a fence (or stock) that slides along it, and a marking pin or blade at the end. You set the fence to your required distance, lock it in place, and run the gauge along the wood to leave a precise scored line.
That scored line is more accurate than a pencil mark — it won't smudge, it's consistent along the full length, and a sharp chisel or saw can register directly into it.
Types of Marking Gauge
Pin Gauge (Scratch Gauge)
The most common type. A hardened steel pin scribes the line. Works well across the grain and along the grain on most timbers. The Joseph Marples 8" Beech Marking Gauge is a traditional, well-made choice for general joinery.
Cutting Gauge
Uses a small blade instead of a pin. Cuts cleanly across the grain without tearing fibres — ideal for marking out tenon shoulders and rebates on hardwoods.
Mortice Gauge
Has two pins that can be set independently, allowing you to scribe both sides of a mortice or tenon in a single pass. The Spear & Jackson Mortice Gauge is a quality hardwood and brass option that also includes a single pin for standard marking gauge use.
How to Set a Marking Gauge
- Loosen the locking screw on the fence so it slides freely along the beam.
- Measure your required distance from the pin to the face of the fence using a rule. Slide the fence to that position.
- Lock the fence firmly — any movement during use will throw off your line.
- Test on scrap wood before marking your workpiece. Check the scribed line against your measurement and adjust if needed.
How to Use a Marking Gauge
- Hold the gauge with your fingers wrapped around the fence, pressing it firmly against the face or edge of the timber.
- Tilt the gauge slightly forward in the direction of travel — this helps the pin trail cleanly rather than dig in.
- Push or pull along the grain in a smooth, consistent motion. Apply light pressure — you're scribing, not carving.
- Make two or three light passes rather than one heavy pass for a cleaner, more accurate line.
- Always work from the face side or face edge — the reference surfaces you've already trued up — to keep your marks consistent.
Common Mistakes to Avoid
- Fence not tight enough — even slight movement will give you an inconsistent line. Always check the lock before marking.
- Too much pressure — a heavy hand tears the grain rather than scribing it cleanly. Let the pin do the work.
- Working from the wrong face — always reference from your face side and face edge, not from a rough or untrued surface.
- Dull pin — a worn pin drags and tears. Sharpen or replace it regularly.
Marking Gauges at Cherry Tree Tools
Browse our full range of Marking & Measuring tools, including the Joseph Marples Beech Marking Gauge and the Spear & Jackson Mortice Gauge — from trusted brands including Joseph Marples, Spear & Jackson and Footprint Tools.
For the chisels and saws you'll be using alongside your marking gauge, see our Chisels & Wood Carving Tools and Saws collections.