A Deep-Reach Cam Clamp

Toolmaking is a key part of boatbuilding. Many of the specialized devices we need can’t be bought off the shelf; they must be made by the builder. Lapstrake planking provides an excellent example: the builder must temporarily hold overlapping planks in place so they can be riveted, clench-nailed, or glued together. Temporary screws, wooden braces, or specialized clamps can work for this, but nothing suits the task as well as a shop-made cam clamp.

The clamp shown here has a deep reach, so it works even with very wide planks—for example those used in Nordic boat types. It is lightweight, which is important because the weight of heavy steel clamps can distort thin lapstrake planks and get in the way of correctly assessing fairness and fit. Finally, this type of clamp is quick and easy to use, which is especially important for a solo builder rushing to hang a long, unwieldy plank fresh out of the steambox.

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