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.

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