What are the proportions for a dovetail joint?

Dovetail angles are usually expressed as ratios — the most common being 1:6 and 1:8 (said “one in eight,” and also written as 6:1 or 8:1).

What is the ratio of tail to pin in a dovetail joint?

The line between that end point and starting point will be the angle of your tail and pin sides. 6:1 (9.5°) and 8:1 (7.1°) dovetail ratios are the most common (though you’ll often see 4:1 and 10:1 as well).

What ratio is a 14 degree dovetail?

This 14° marker equates to a ratio of 1:4. When used with thinner stock, the 14° angle results in a better looking joint. This different angle also gives you a slightly stronger dovetail interlock on the thinner material.

What is the formula for measuring dovetails?

To obtain dimension x for measuring male dovetails, add 1 to the cotangent of one-half the dovetail angle α, multiply by diameter D of the rods used, and add the product to dimension α.

What are the rules for dovetail joints?

The space between half pins is divided between pins and tails. Fine work the pins 4mm > 6mm, larger work 7mm > 12mm. To have a desirable appearance the pins smaller than the tails. Your tails should be around 18mm > 35mm for fine work like drawers and 35mm > 55mm on larger work like a chest.

What is a 6 to 1 dovetail?

A 1:6 ratio – that’s one unit horizontal with six matching units drawn vertical – lays out as a 9.5 degree angle.

How do you mark out a dovetail joint?

Mark out the two ‘half-pins’ at the edges on the first piece of wood. The ‘pins’ are the bits of wood between the tails so there are two half-pins; one each side. The general rule is that they measure half the thickness of timber plus around a mm, so the two dots on the shoulder line are 7mm in from each edge.

What is the best dovetail ratio?

Dovetail angles are usually expressed as ratios — the most common being 1:6 and 1:8 (said “one in eight,” and also written as 6:1 or 8:1). As a general rule of thumb: Use 1:6 for softwoods. Use 1:8 for hardwoods.

What is the best angle for a dovetail joint?

Lower (7° to 9°) angles are often advised for joining hardwoods, while higher angles (10° to 14°) are recommended for softwoods and even higher angles (14° to 18°) for half-blind dovetails.

What is the most common dovetail angle?

Percy Blandford, who has been writing about woodworking for a long time, writes in “The Woodworker’s Bible” that any angle between 7.5° and 10° is acceptable. The ideal, he says, is 8.5° for softwoods and 7.5° when joining hardwoods.

How big should a dovetail joint be?

Typically we use 1 ½” – 2” deep dovetails that are about 2” less deep than the joist, and 4” less deep than the girt – but that is just a starting point – the loads and reactions have to be calculated from there.

What are common dovetail sizes?

Dovetails come in several different types and sizes depending on manufacturer, but the most common are the 11 mm and 3⁄8 inch (9.5 mm). Some other less known, but currently commercially available dovetail mounts, are 12, 13, 13.5, 14, 14.5, 16, 16.5, 17 and 19 mm.

What is 11mm dovetail?

The standard 22 tip-off dovetail in the US is 3/8″ at the bottom and up to 1/2″ at the top. The European 11mm dovetail is typically 11mm at the top and perhaps 8mm at the bottom. The 11mm dovetail typically has a 60 degree angle from the bottom inside corner to the top where the 3/8″ is typically 45 degrees.

Should dovetail joints be glued?

Michael Dresdner: The only areas that require glue on dovetails are the diagonal faces. All the diagonal faces are long grain, all the square faces are end grain, and all the flat faces abut end grain. Therefore, you need only apply glue to the diagonal faces on the tails or pins, or both.

What is the weakness of dovetail joint?

The disadvantages of dovetail joints are that they can be fairly difficult to mark out and cut, and if they are made badly these joints lose the advantages listed above. Depending on the project, function, and design, there are a number of different types of dovetail joints to choose from.

What is tail aspect ratio?

Tail Aspect Ratio The higher the aspect ratio, the more the lift changes per degree of angle of attack change. This means that for a given tail area, a higher aspect ratio tail will provide a larger stability increment because its lift will vary more rapidly with angle of attack than a lower aspect ratio surface.

What is the tail on a dovetail joint?

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.

How many pins are in a dovetail joint?

There is usually a three pin setup but more or less pins can be used depending on how much strength and aesthetics you want.

What is the ratio of vertical tail?

A typical aspect ratio for a vertical tail is in the range of 1.3 to 2.0 (here the aspect ratio is based on the span from root-to-tip as the span from tip-to-tip has no meaning in the case of a vertical stabilizer).

What is a standard dovetail?

Standard dovetail joints have evenly spaced cut pins and tails, traditional dovetails have wide-cut pins and smaller tails. Standard cut pins and tails offer more strength in the drawer, traditional is not quite so strong but are often specified because of their traditional finish.

What is the minimum thickness for a dovetail?

Structurally I have looked for pin strength in dovetails as the dovetailed aspect is always strong because it is always at least as wide and mostly wider than the pins. In my own work I aim for a minimum size of 1/4″ and mostly 3/8″.

What is an English dovetail joint?

A dovetail joint is a locking joint. The English dovetail construction tends to allow for the largest possible drawer storage capacity. French dovetail construction is used for more elaborate features such a curved, bowed design.

Which part of a dovetail do you cut first?

Cutting the dovetail pins first makes sense. It’s easier to hold the pin board in place to mark the tails than it is to hold the tail board against the end of what will be the pin board. Also, the walls of the pins provide a good surface for the awl as you mark the tails.1 Feb 1996

What is the most popular dovetail joint?

Single-lap Dovetail The single-lap (known to many folks as a half-blind dovetail) is the best known of the dovetails since it’s used to join the front to the sides of a drawer.

Which is better English or French dovetail?

While both English and French dovetail construction are very sturdy and high quality, English dovetail construction is slightly sturdier with the trade-off of being more expensive and time-consuming to produce.

What is stronger dovetail or finger joint?

The interlocking design of the dovetail creates a strong bond that can withstand a lot of stress. On the other hand, a box joint, also known as a finger joint, is strong in terms of sheer surface area and glue surface, making it suitable for joining the corners of a box or a drawer.

Mike Walker

Repair and Construction Expert. WoodiesDIY.tv Owner