An easy way to make a pivot or hinge (as for a folding lawn chair) is to drill through the pieces and fasten them with a bolt and nut. But metal wears the wood down, leaving a sloppy fit.

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Separate the wood and the metal with plastic tubing. Select tubing that fits the bolt snugly. Then, drill through the wooden pieces to fit the tubing's outside diameter. Cut a length of tubing as a bushing for each wooden part, and assemble the parts as shown above.
—Bob Kettler, Cincinnati, Ohio