I use Vernier calipers to measure my progress when turning tenons. I set the caliper jaws to the desired diameter of the tenon, and then hold the jaws against the turning in progress until they slip over the tenon section. To prevent the tips of the caliper jaws from catching on the spinning workpiece, I grind a slight radius on them. This also allows them to easily slide onto the tenon once it reaches the proper diameter.
—Judy Silfer, Tucson, Arizona
