Clamping aids come through when duty cauls

Because most clamp jaws are less than 2 in. wide, tightening the clamps directs the clamping pressure to only a small section of the workpiece. As a result, joints (and entire woodworking projects) can be pulled out of square, A good solution to this effect is to use wood cauls when gluing up your projects.

Wood cauls are simply strips of wood that are slipped bet ween clamps and the workpiece to distribute the clamping pressure evenly. Woodworkers have been using them for centuries to help create strong, square joints. You can use any hardwood, or even strips of plywood, to make your own wood cauls. Be sure to have plenty on hand before beginning the glue-up.

Wood cauls

Clamping & gluing techniques

Fixed ciamp heads meet in middle

Shop-built clamp extender

Wood Working for Amateur Craftsman

Wood Working for Amateur Craftsman

THIS book is one of the series of Handbooks on industrial subjects being published by the Popular Mechanics Company. Like Popular Mechanics Magazine, and like the other books in this series, it is written so you can understand it. The purpose of Popular Mechanics Handbooks is to supply a growing demand for high-class, up-to-date and accurate text-books, suitable for home study as well as for class use, on all mechanical subjects. The textand illustrations, in each instance, have been prepared expressly for this series by well known experts, and revised by the editor of Popular Mechanics.

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