But it also brands the joint as machine cut. This steeper angle certainly makes for a strong joint. Many of these early jigs were designed to work with a 14° bit. The first dovetail jigs were limited to evenly spaced, half-blind dovetails with equally sized pins and tails. Things changed when dovetail jigs first arrived on the scene. That’s because precision measuring tools weren’t commonly available, but craftsmen could easily measure a slope to define the angles. Traditionally, hand-cut dovetails were laid out using a ratio that defined a slope angle. The reason for this is the angle of the tails, which are cut by the dovetail bit, must match the template used to cut the pins for a perfect-fitting joint. But when it comes to choosing router bits, chances are your jig will make that decision for you. Selecting the right angle for a dovetail joint is an important concern.
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