A dovetail table saw is part of the trunnion design that controls the elevation of the blade. The “dovetail” of the trunnion assembly helps keep the blade inline when raising/lower, whereas there is a slight pivot movement seen in normal trunnion design. The advantage of a trunnion design is accuracy, smoothness and less vibration.
To learn more check out the following video:
Tablesaw Talk - Tool Talk with Harvey!
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