Should Dowels Be Tight?

Dowels can run a few thousandths of an inch larger or smaller than their specified diameter, leaving them tight or loose in the mating holes. Here's an easy way to make sure that the dowels fit snug. For a 1⁄ 4 " dowel, for example, drill a 1⁄ 4 " hole in scrap. Test-fit the dowel in the hole.

Should a dowel hole be the same size as the dowel length or slightly longer?

You are correct in stating "dowels should not be forced into a hole" Remember also that most wood (including some dowels) will expand and contract in humid/moist weather. Best to match up dowels with the (nearly) same size hole.

How can I make my dowels tighter?

If your dowel is now too small for its hole, wind cotton or linen thread around the tip of the dowel to make it thicker. Then coat the wood and thread with glue, and reassemble. Another way to fit a shrunken dowel into the hole is with a shim. Shims can be purchased where wood is sold.

Marcus Vance

Marcus Vance

Cybersecurity & Digital Privacy Researcher

Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.