The Dovetail Joint
Dovetails can be cut by hand or by machines, often with an electric router and using one of a range of commercially available jigs or templates. Although it is technically a straight forward process, hand-cutting dovetails requires a high degree of accuracy to ensure a snug fit and so can be difficult to master. The pins and tails must fit together with no gap between them so that the joint interlocks tightly with no movement. Thus the cutting of dovetails by hand is regarded as a mark of skill on the part of the craftsperson.
The angle of slope varies according to the wood used. Typically the slope is 1:6 for softwoods and a shallower 1:8 slope for hardwoods. Often a slope of 1:7 is used as a compromise – perhaps using a dovetail template for marking out.
When being cut by hand, there are two schools of thought as to whether the pins or the tails should be cut first. For pins first, the pins are laid out and cut by the chosen method, then the outline of the pins is transferred to the face of the tail board. For tails first, the tails are laid out and cut and then the outline is transferred to the end grain of the pin board. Each has advantages and it is a personal choice as to which is chosen.
Hand cut dovetails can often be distinguished from machine-cut dovetails by the width of the pins. It is possible to have pins that are almost triangular when cut by hand that are not possible when cut with a router, owing to the thickness of the router bit’s shank. These narrow pins are known as London Pins.
Types of dovetail
Through Dovetail
A through dovetail joint
Through dovetails are common in carcass and box construction. Traditionally, the dovetails would have often be covered by a veneer. However, dovetails have become a signature of craftsmanship and are generally considered a feature, so they are rarely concealed in contemporary work.
Use for:
• Carcass and box construction
Half-blind dovetail
A half-blind dovetail joint
A half-blind dovetail is used when the craftsman does not wish end grain to be visible from the front of the item. The tails are housed in sockets in the ends of the board that is to be the front of the item so that their ends cannot be seen.
Half-blind dovetails are commonly used to fasten drawer fronts to drawer sides. This is an alternative to the practice of attaching false fronts to drawers constructed using through dovetails.
Use for:
• Attaching drawer fronts
Sliding dovetail
A sliding dovetail joint
The sliding dovetail is a method of joining two boards at right angles, where the intersection occurs within the field of one of the boards, that is not at the end. This joint provides the interlocking strength of a dovetail. Sliding dovetails are assembled by sliding the tail into the socket. It is common to slightly taper the socket, making it
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