Pin Gauges vs. Slicing Gauges

25 Apr

Pin gauges and slicing gauges fall under the umbrella of marking gauges and are primarily used to scribe lines for joinery. Pin gauges are simple and inexpensive. They consist of a steel pin mounted near the end of a bar that’s most often made of wood. Without refinement, the pin makes a V-shaped cut that tends to rip the fibers when marking across the grain, as for the tenon. On slicing gauge (often called cutting gauges), the pin is replaced by a knife-like cutter that typically is flat on the outside face and beveled on the inside. This wedge shape pulls the main body of the gauge tight to the edge of the stock and discourages the blade from wandering. This profile also leads to tighter joinery because bevel is on the waste side of the cut.

A modern variation of the slicing gauge is the wheel gauge, which uses a beveled circular cutter mounted at the end of a bar or a round steel shaft. The cutter does not rotate during use. When a section of its edge dulls, it can be loosened and rotated to expose a new section.

The all-metal versions of the wheel gauge come with disk-shaped fences that typically are smaller than the rectangular wood fences common to traditional slicing gauges. To me they feel awkward and provide too little bearing surface along the edge of the workpiece. Still many folks I know would be reluctant o give theirs up.

If you have a pin gauge, you can convert it to slicing gauge. Just file the pin’s outside face flat and its inside face on an angle to form an edge that actually will cut the wood.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: