Does 1/4" = 1/4"?


Frank Speyerer

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If you want to get really persnickety, it's actually 6mm which is more or less a hair under a full quarter of an inch which is why it gets labeled that way, if it's truly Baltic Birch which is not manufactured in the states, thus the metric thickness measurement. Same holds true for the other common thicknesses.

1/2 is actually 12mm

3/4 is actually 18mm

Know those "undersized for plywood" straight router bits that pretty much every manufacturer makes? Track down 6mm, 12mm and 18mm bits if you do a lot of dado work in Baltic birch. The joints will be pretty much spot-on.

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