Cam Fittings

The cam fitting is a discreet knock-down joint for carcases constructed from man-made boards. It is used to make corner joints, or for holding shelves and vertical dividers. A round-head metal dowel screwed into the vertical component or side panel locates with a cam-action boss set in the underside of the horizontal component or shelf. Turning the boss with a screwdriver pulls the joint tight. The standard straight dowel is made with a coarse thread that screws directly into the board. Another

type of dowel screws into a plastic or metal insert. Double-ended dowels secure straight end-to-end joints, and a cranked version is used for mitres.

Cam Fixing Dowell Specifications

1 Fitting the dowels

For a corner joint, set a marking gauge to half the thickness of the board and scribe a line on the inside of the side panel. Mark off two centres equidistant from each edge; a wide panel may require another dowel in the middle. Drill pilot holes for coarse-threaded dowels, and screw them in place.

Cam Dowel Jig

2 Inserting cam-action bosses

Scribe a line centrally on the end of the shelf and, using the side panel as a guide, mark out the positions of clearance holes for the dowels. Drill the holes to the required depth. On the underside, use a Forstner bit to drill stopped holes that intercept the centre of the dowel holes, and insert the bosses.

Wood Work Joints

3 Assembling the joint

Each boss is marked with an arrow that should point towards the side panel. Assemble the joint with a dowel in each hole, then turn the bosses with a screwdriver to lock the components together.

Locking Cam And Dowel Joint

Chapter 2 4 Although woodworking machinery produces work with ease and accuracy, handtools are still important in joint-making. It is often more convenient to hand-make a limited number of joints, and it is impossible to make certain joints with a power tool. This glossary lists joint-making hand-tools, power tools and machinery; special jigs and templates are found with the relevant joints.

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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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